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  • Arisumi T. 1982. Endosperm Balance Number among New Guinea-Indonesian Impatiens species. Journal of Heredity 73:5765.
  • Averett JE. 1980. Polyploidy in plant taxa. In: LewisWH, ed. Polyploidy, biological relevance. New York : Plenum Press, 269273.
  • Baker, BS, Carpenter, ATC, Esposito MS, Esposito RE, Sandier L. 1976. The genetic control of meiosis. Annual Review of Genetics 10: 53134.
  • Bamberg JB, Hanneman RE Jr. 1991. Rapid ploidy screening of tuber-hearing Solanum (potato) species through pollen diametermeasurement. American Potato Journal 68: 279285.
  • Berdhal JD, Barker RE. 1991. Characterization of autotetraploid Russian wildrye produced with nitrous oxyde. Crop Science 31: 11531155.
  • Bingham ET. 1971. Isolation of haploids of tetraploid alfalfa. Crop Science 11: 433435.
  • Bingham ET. 1980. Maximizing heterozygosity in autopolyploids. In: LewisWH, ed. Polyploidy, biological relevance. New York : Plenum Press, 471490.
  • Bingham ET. 1990. Backcrossing tetraploidy into diploid Medicago falcata L. using 2n eggs. Crop Science 30: 13531354.
  • Bingham ET, McCoy TJ. 1979. Cultivated alfalfa at the diploid level: origin, reproductive stability and yield of seed and forage. Crop Science 19: 97101.
  • Bingham ET, Saunders JW. 1974. Chromosome manipulations in alfalfa: scaling the cultivated tetraploid to seven ploicly levels. Crop Science 14: 474477.
  • Bingham ET, Smith RR, Casler MD. 1991. Reproduction dynamics of polyploid forage legumes and grasses. In: VeronesiK, BullitaS, CareldaS, eds. Ploidy and chromosome manipulation in forage breeding. Proc. of the 17th Meeting of the fodder crops section of Eucarpia, Alghero, Italy, 14–18 October, 713.
  • Bino RJ, Van Tuyl JM, De Vries JN. 1990. Flow cytometric determination of relative nuclear DNA contents in bicellulate and tricellulate pollen. Annals of Botany 65: 38.
  • Borrill M, Lindner, R. 1971. Diploid-tetraploid sympatry in Dactylis (Gramineae). New Phytologist 70: 11111124.
  • Briggs D, Walters SM. 1984. Plant variation and evolution. Cambridge : Cambridge University Press.
  • Bringhurst RS. 1990. Cytogenetics and evolution in American Fragaria. HortScience 25: 879881.
  • Brochman C, Soltis PS, Soltis DE. 1992. Recurrent formation and polyphyly of nordic polyploids in Draba (Brassicaceae). American Journal of Botany 79: 673688.
  • Bullita S, Smith RR. 1992. Preliminary evidence for the presence of 2n pollen in Trifolium nigrescens Viv. and its relevance to the evolution of Trifolium re-pens L. In: MarianiA, TavolettiS, eds. Gametes with somatic chromosome number in the evolution and breeding of polyploid polysomic species: achievements and perspectives, 6772.
  • Camadro EL, Peloquin SJ. 1980. The occurrence and frequency of 2n pollen in three diploid Solanums from Northwest Argentina. Theoretical and Applied Genetics 56: 1115.
  • Chaboudez P. 1989. Modes de reproduction et variabitié génétique des populations de Chondrilla juncea L.: implications dans la lutte microbiologique contre cette mauvaise herbe. Thése Univ. Sci. Tech. Languedoc, Montpellier, France.
  • Conicella CA, Barone CA, Del Giudice A, Fruciante L, Monti LM. 1991. Cytological evidence of SDR-FDR mixture in the formation of 2n eggs in a potato diploid clone. Theoretical and Applied Genetics 81: 5963.
  • Darlington CD. 1937. Recent advances in cytology. Philadelphia : Blakinston's Son & Co. Inc.
  • Darlington CD. 1956. Chromosome botany and the origins of cultivated plants. London : George Allen & Unwin Ltd.
  • D'Amato F. 1989. Polyploidy in cell differentiation. Caryologis 42: 183211.
  • De Haan A, Maceira NO, Lumaret R, Delay J. 1992. Production of 2n gametes in diploid subspecies of Dactylis gomerata L. 2. Occurrence and frequency of 2n eggs. Annals of Botany 69: 345350.
  • De Jong H, Tai GCC, Russell WA, Johnston GR, Proudfoot KG. 1981. Yield potential and genotype-environment interactions of tetraploid–diploid (4x-2x) potato hybrids. American Potato Journal 58: 191199.
  • De Jong H, Tai GCC. 1991. Evaluation of potato hybrids obtained from tetraploid-diploid crosses. 1. Parent-offspring relationships. Plant Breeding 107: 177182.
  • Den Nijs APM, Stephenson AG. 1988. Potential of unreduced pollen for breeding tetraploid perennial ryegrass. In: CrestiM, GoriP, PaciniE, eds. Sexual reproduction in higher plants. Berlin : Springer-Verlag, 131136.
  • Den Nijs APM, Winkelhorst GD. 1989. Sexual polyploidization in perennial ryegrass breeding (Lolium perenne). XII Eucarpia Congress, Gottingen, Germany.
  • Den Nijs JCM, Sorgdrager K, Stoop J. 1985. Biosystematic studies of the Rumex acetosella complex. IX. Cytogeography of the complex in the Iberian Peninsula and taxonomic discussion. Botanica Helvetica 95: 141156.
  • Den Nijs TPM, Peloquin SJ. 1977a. Polyploid evolution via 2n gametes. American Potato Journal 54: 377386.
  • Den Nijs TPM, Peloquin SJ. 1977 6. 2n gametes in potato species and their function in sexual polyploidization. Euphytica 26: 585600.
  • De Wet JMJ. 1971. Reversible tetraploidy as an evolutionary mechanism. Evolution 25: 545549.
  • De Wet JMJ. 1980. Origins of polyploids. In: LewisWH, ed. Polyploidy, biological relevance. New York : Plenum Press, 316.
  • De Wet JMJ. 1986. Hybridization and polyploidy in the Poaceae. In: SoderstromTR, HiluKW, CampbellCS, BarkworthNE, eds. Grass systematics and evolution. Washington , D.C. , London : Smithsonian Institution Press, 188194.
  • Dobzhansky T, Ayala FJ, Stebbins GL, Valentine JW. 1977. Evolution. San Francisco : WH. Freeman and Company.
  • Dodson EO, Dodson P. 1976. Evolution: process and product. New York : Van Nostrand Company.
  • Douches DS, Quiros CF. 1987. Use of 4x-2x crosses to determine gene-centromere map distance of isozyme loci in Solanum species. Genome 29: 519527.
  • Douches DS, Quiros CF. 1988. Genetic recombination in a diploid synaptic mutant and a Solanum tuberosum× S. chacoense diploid hybrid. Heredity 60: 183191.
  • Dunbier MW, Bingham ET. 1975. Maximum heterozygosity in alfalfa: results derived using haploid-derived autotetraploids. Crop Science 15: 527531.
  • Dweikat IM, Lyrene PM. 1988. Production and viability of unreduced gametes in triploid interspecific blueberry hybrids. Theoretical and Applied Genetics 76: 555559.
  • Eckenwalder JE, Brown BP. 1986. Polyploid speciation in hybrid morning glories of Ipomoea L. sect. Quamoclit Griseb. Canadian Journal of Genetics and Cytology 28: 1720.
  • Ehlenfeldt MK, Hanneman RE Jr. 1988. Genetic control of Endosperm Balance Number (EBN): Three additive loci in a threshold-like system. Theoretical and Applied Genetics 75:825832.
  • Ehredorfer F. 1980. Polyploidy and distribution. In: LewisWH, ed. Polyploidy, biological relevance. New York : Plenum Press, 4560.
  • Eijlander R. 1988. Manipulation of the 2n-gametes frequencies in Solanum pollen. Euphytica 39: 4550.
  • Evans GM, Rahman MM. 1990. The basis of low grain yield and infertility in autotetraploid barley (Hordeum vulgare). Heredity 64: 305313.
  • Fagerberg WR, Davis TM, Matthews LJ. 1990. Comparison of tetraploid and single gene-induced gigas variants in chickpea (Cicer arietinum I. II. Morphological and anatomical leaf characters. American Journal of Botany 77: 300304.
  • Felber F. 1991. Establishment of a tetraploid cytotype in a diploid population: effect of relative fitness of the cytotypes. Journal of Evolutionary Biology 4: 195207.
  • Felber F. 1994. Hybridization rate and its consequences in gene flow in a narrow hybrid zone between diploid and tetraploid Anthoxanthum alpinum (Poaceae)(in prep.).
  • Fowler NL, Levin DA. 1984. Ecological constraints on the establishment of a novel polyploid in competition with its diploid progenitor. The American Naturalist 124: 703711.
  • Freyre R, Iwanaga M, Orjeda G. 1991. Use of Ipomoeo trifida(HBK.) G. don germ plasm for sweet-potato improvement. 2. Fertility of synthetic hexaploids and triploids with 2n gametes trifida, and their interspecific crossability with sweet potato. Genome 34: 209214.
  • Gadella TWJ. 1988. Some notes on the origin of polyploidy in Hieracium pilosella aggr. Acta Botanica Neerl. 37: 515522.
  • Galbraith DW, Harkins K, Maddox JM, Ayres NM, Sharma DP, Firoozabady E. 1983. Rapid flow cytometric analysis of the cell type in intact plant tissues. Science 220: 10491051.
  • Goldblatt P. 1980. Polyploidy in angiosperms: monocotyledons. In: LewisWH, ed. Polyploidy, biological relevance. New York : Plenum Press, 219239.
  • Grant V. 1981. Plum speciation. 2nd edn. New York : Columbia University Press.
  • Groose RW, Kojis WP, Bingham ET. 1988. Combining ability differences between isogenic diploid and tetraploid alfalfa. Crop Science 28: 710.
  • Groose RW, Talbert LE, Kojis WP, Bingham ET. 1989. 1 regressive heterosis in autotetraploid alfalfa: studies using two types of inbreds. Crop Science 29: 11731177.
  • Hahn SK, Bai KV, Asiedu R. 1990. Tetraploids, triploids, and 2n pollen from diploid interspecific crosses with cassava. Theoretical and Applied Genetics 79: 433439.
  • Hague LM, Jones RN. 1987. Cytogenetics of Lolium perenne. 4. Colchicine induced variation in diploids. Theoretical and Applied Genetics 74: 233241.
  • Harlan JR, De Wet JMJ. 1975. On 6. Winge and a prayer: the origins of polyploidy. The Botanical Review 41: 361690.
  • Hermsen JGT. 1984a. Nature, evolution, and breeding of Polyploids. Iowa State Journal of Research 58: 411420.
  • Hermsen JGT. 1984b. Mechanisms and genetic implications of 2n-gamete formation. Iowa State Journal of Research 58:421434.
  • Hermsen JGT. 1984c. The potential of meiotic polyploidization in breeding allogamous crops. Iowa State Journal of Research 58:435448.
  • Humbert-Droz C, Felber F. 1992. Etude biométrique des stomates et des grains de pollen comme indicateurs du degré de Polyploïdie chez Anthoxanthum alpinum Love et Love. Bulletin tie la Société Neuchâteloise de Sciences Naturelles 115: 3145.
  • Iwanaga M. 1984. Discovery of a synaptic mutant in potato haploids and its usefulness for potato breeding. Theoretical and Applied Genetics 68: 8793.
  • Iwanaga M, Freyre R, Orjeda G. 1991 a. Use of Ipomoea trifida (HBK.) G. don germplasm for sweet potato improvement. 1. Development of synthetic hexaploids of I. trifida by ploidy-level manipulations. Genome 34: 201208.
  • Iwanaga M, Ortiz R, Cipar MS, Peloquin SJ. 1991 b. A restorer gene for genetic-cytoplasmic male sterility in cultivated potatoes. American Potato Journal 68: 1928.
  • Iwanaga M, Peloquin SJ. 1982. Origin and evolution of cultivated tetraploid potatoes via 2n gametes. Theoretical and Applied Genetics 61: 161169.
  • Jackson RC. 1976. Evolution and systematic significance of polyploidy. Annual Review of Ecology and Systematics 7: 209234.
  • Jackson RC, Casey J. 1980. Cytogenetics of polyploids. In: LewisWH, ed. Polyploidy, biological relevance. New York : Plenum Press, 1744.
  • Jansen RC, Den Nijs APM. 1990. The statistical analysis of 2n and 4n pollen formation in Lolium perenne using pollen diameters. Proceedings of the 16th Meeting of the Fodder Crop Section of Eucarpia, Wageningen , The Netherlands , 1822 November.
  • Jansen RC, Den Nijs APM. 1993. A statistical mixture model for estimating the proportion of unreduced pollen grain in perennial ryegrass (Lolium perenne L.) via the size of pollen grain. Euphytica 70: 205215.
  • Jay M, Reybaud J, Blaise S, Carder D. 1991. Evolution and differentiation of Lotus corniculatus/Lotus alpinus populations from French south-western Alps. III. Conclusions. Evolutionary Trends in Plants 5: 157160.
  • Johnston SA, Den Nijs TPN, Peloquin SJ, Hanneman RE Jr. 1980. The significance of genetic balance to endosperm development in interspecific crosses. Theoretical and Applied Genetics 57: 59.
  • Johnston SA, Hanneman RE Jr. 1980. Support of the Endosperm Balance Number hypothesis utilizing some tuber-bearing Solanum species. American Potato Journal 57: 714.
  • Johnston SA, Hanneman RE Jr. 1982. Manipulations of endosperm balance number overcome crossing barters between diploid Solanum species. Science 217: 446448.
  • Jones A. 1990. Unreduced pollen in a wild tetraploid relative of sweetpotato. Journal of the American Society of Horticultural Science 115: 512516.
  • Jongedijk E. 1985. The pattern of megasporogenesis and megagametogenesis in diploid Solanum species hybrids; its relevance to the origin of 2n eggs and the induction of apomixis. Euphytica 34: 599611.
  • Jongedijk E. 1987. A rapid methyl salicyclatc clearing technique for routine phase-contrast observations on female meiosis in Solanum. Journal of Microscopy 146: 157162.
  • Jongedijk E, Hutten RCB, Van Der Wolk JMASA, Schuurmans Stekhoven SIJ. 1991a. Synaptic mutants in potato, Solanum tuberosum L. III. Effect of the Sd-1/ds-1 locus (desynapsis) on genetic recombination in male and female meiosis. Genome 34: 121130.
  • Jongedijk E, Ramanna MS. 1988. Synaptic mutants in potato, Solanum tuberosum L. I. Expression and identity of genes for desynapsis. Genome 30: 664670.
  • Jongedijk E, Ramanna MS. 1989. Synaptic mutants in potato, Solanum tuberosum L. 11. Concurrent reduction of chiasma frequencies in male and female meiosis of ds-1 (desynapsis) mutants. Genome 32: 10541062.
  • Jongedijk E, Ramanna MS, Sawor Z, Hermsen JGT. 1991b. Formation of first division restitution (KDK) 2n-megaspores through pseudohomotypic division in ds-1 (desynapsis) mutants of diploid potato: routine production of tetraploid progeny from 2xFDR×2xFDR crosses. Theoretical and Applied Genetics 82: 645656.
  • Karpechenko GD. 1927. The production of polyploid gametes in hybrids. Hereditas 9: 349368.
  • Kaul MLH, Murthy TGK. 1985. Mutant genes affecting higher plant meiosis. Theoretical and Applied Genetics 70: 449466.
  • Keeler KH, Kwankin B, Barnes PW, Galbraith DW. 1987. Polyploid polymorphism in Andropoyon qerardii. Genome 29: 374379.
  • Koduru PRK, Rao MK. 1981. Cytogenetics of synaptic mutants in higher plants. Theoretical and Applied Genetics 59: 197214.
  • Lelley T, Mahmoud AA, Lein V. 1987. Genetics and cytology of unreduced gametes in cultivated rye (Secale cereale L.). Genome 29: 635638.
  • Levin DA. 1975. Minority cytotype exclusion in local plant populations. Taxon 24: 3543.
  • Levin DA. 1983. Polyploidy and novelty in flowering plants. The American Naturalist 122: 125.
  • Lewis WH. 1980. Polyploidy in species populations. In: LewisWH, ed. Polyploidy biological relevance. New York : Plenum Press, 103144.
  • Love SL, Rhode BB, Nugent PE. 1986. Controlled pollination transfer of a nuclear male-sterile gene from a diploid to a tetraploid watermelon line. Euphytica 35: 633638.
  • Lumaret R. 1988. Cytology, genetics, and evolution in the genus Dactylis. CRC Critical Reviews in Plant Sciences 7: 5591.
  • Lumaret R. 1991. The diplogamete method and ploicly manipulation in fodder crops breeding. In: DenNijsAPM, ElgersmaA, eds. Fodder crops breeding: achievements, novel strategies and biotechnology. Wageningen : Pudoc, 95100.
  • Lumaret R, Barrientos E. 1990. Phylogenic relationships and gene flow between sympatric diploid and tetraploid plants of Dactylis glomerata (Gramineae). Plant Systematics and Evolution 169: 8196.
  • Lumaret R, Bretagnolle F, Maceira NO. 1992. 2N gamete frequency and bilateral polyploidization in Dactylis glomerata L. In: MarianiA, TavolettiS, eds. Gametes with somatic chromosome number in the evolution and breeding of polyploid polysomic species: achievements and perspectives. Perugia, Italy, 1521.
  • Lumaret R, Maceira NO, De Haan A, Delay J. 1989. Screening of 2n gametes to produce new tetraploid material from diploids in Dactylis glomerata L. XVI International Grassland Congress, Nice, France.
  • Maceira NO. 1990. Signification évolutive de la polyploidie: mecanismes et consequences. Exemple de Dactylis glomerata L. (Graminaceae). These Univ. Sci. Techn. Languedoc, Montpellier, France.
  • Maceira NO, De Haan AA, Lumaret R, Billon M, Delay J. 1992. Production of 2n gametes in diploid subspecies of Dactylis glomerata L. 1. Occurrence and frequency ol 2n pollen. Annals of Botany 69: 335343.
  • Maizonnier D. 1976. Production de tétraploïdes et de trisomiques naturels chez le Petunia. Annales d'Amélioration ties Plantes 26: 305318.
  • Mariani A, Tavoletti S, Veronesi F. 1991. Cytology of 2n gamete formation in the Medicago saliva complex. In: VeronesiF, BullitaS, CareldaS, eds. Ploidy and chromosome manipulation in forage breeding. Proceedings of the 17th Meeting of the fodder crops section of Eucarpia, Alghero, Italy, 14–18 October, 6067.
  • Mariani A, Tavoletti S, Veronesi F. 1992. Alfalfa evolution and breeding through 2n gametes. In: MarianiA, TavolettiS, eds. Gametes with somatic chromosome number in the evolution and breeding of polyploid polysomic species: achievements and perspectives. Perugia, Italy, 7381.
  • Masuelli RW, Camadro EL, Mendiburu AO. 1992. 2n gametes in Solanum commersonii and cytological mechanisms of triplandroid formation in triploid hybrids of Solanum commersonii×Solanum gourlayi. Genome 35: 864869.
  • Mayr E. 1963. Populations, species and evolution. New York : Academic Press.
  • McCoy TJ. 1982. Inheritance of 2n pollen formation in diploid alfalfa (Medicago saliva L.). Canadian Journal of Genetics and Cytology 24: 315323.
  • McCoy TJ. 1992. Genome manipulation and molecular genetic analysis of alfalfa (Medicago saliva L.). In: MarianiA, TavolettiS, eds. Gametes with somatic chromosome number in the evolution and breeding of polyploid polysomic species: achievements and perspectives. Perugia, Italy, 5559.
  • McCoy TJ, Rowe DE. 1986. Single cross alfalfa (Medicago saliva L.) hybrids produced via 2n gametes and somatic chromosome doubling: experimental and theoretical comparisons. Theoretical and Applied Genetics 72: 8083.
  • McElroy AR. 1991. Expected levels of heterozygosity in auto-tetraploid progeny populations. Euphytica 55: 117123.
  • McHale NA. 1983. Environmental induction of high frequency 2n pollen formation in diploid Solanum. Canadian Journal of Genetics and Cytology 25: 609615.
  • Mendiburu AO, Peloquin SJ. 1976. Sexual polyploidization and depolyploidization: some terminology and definitions. Theoretical and Applied Genetics 48: 137143.
  • Mendiburu AO, Peloquin SJ. 1977a. The significance of 2n gametes in potato breeding. Theoretical and Applied Genetics 49: 5361.
  • Mendiburu AO, Peloquin SJ. 1977b. Bilateral sexual polyploidization in potatoes. Euphytica 26: 573583.
  • Mendiburu AO, Peloquin SJ. 1979. Gene-centromere mapping by 4x-2x matings in potatoes. Theoretical and Applied Genetics 54: 177180.
  • Mitton JB, Grant MC. 1984. Associations among protein heterozygosity, growth rate, and developmental homeostatis. Annual Review of Ecology and Systematics 15: 479499.
  • Mok DW, Peloquin SJ. 1975a. Three mechanisms of 2n pollen formation in diploid potatoes. Canadian Journal of Genetics and Cytology 17: 217225.
  • Mok DW, Peloquin SJ. 1975b. The inheritance of three mechanisms of diplandroid (2n pollen) formation in diploid potatoes. Heredity 35: 295302.
  • Mok DW, Peloquin SJ, Mendiburu AO. 1976. Genetic evidence for mode of 2n pollen formation and S-locus mapping in potatoes. Potato Research 19: 157164.
  • Mousset-Declas C, Colas F, Trontin J-F. 1992. Variation in 2n gamete production in red clover (Trifolium pratense L.): effect of temperature and genotype. In: MarianiA, TavolettiS, eds. Gametes with somatic chromosome number in the evolution and breeding of polyploid polysomic species: achievements and perspectives. Perugia, Italy, 6165.
  • Mulinix CA, Iezzoni AF. 1988. Microgametophytic selection in two alfalfa (Medicago sativa L.) clones. Theoretical and Applied Genetics 75: 917922.
  • Myers JR, Gritton ET, Struckmeyer BE. 1984. Production of 2n pollen and further characterization of the calyx carpellaris (cc) trait in the pea. Crop Science 24: 10631069.
  • Nassar NMA. 1992. Production of triploid cassava, Manihot esculenta Crantz by hybrid diploid gametes. Field Crops Research 30: 173192.
  • Needham DC, Erickson HT. 1992. Fecundity of tetraploid x diploid crosses and fertility of the resulting triploids in Salpiglosis sinuata. HortScience 27: 835837.
  • Negri V, Falcinelli M. 1991. Policy disformity in some genotypes of Lotus tenuis Wald. et Kit. (2n = 2x = 12). Proc SVII Eucarpia Meeting, Alghero 14–17 November 1991.
  • Negri V, Veronesi F. 1989. Evidence for the existence of 2n gametes in Lotus tennis Wald. et Kit. (2n = 4x = 24). Theoretical and Applied Genetics 78: 400404.
  • Nel PM. 1975. Crossing over and diploid egg formation in the elongate mutant of maize. Genetics 79: 435450.
  • Ness BD, Soltis DE, Soltis PS. 1989. Autopolyploidy in Heuchera micrantha (Saxifragaceae). American Journal of Botany 76: 614626.
  • Orjeda G, Freyre R, Iwanaga M. 1990. Production of 2n pollen in diploid I pomoea trifida, a putative wild ancestor of sweet-potato. Journal of Heredity 81: 462467.
  • Ortiz R, Freyre R, Peloquin SJ, Iwanaga M. 1991 a. Adaptation to day length and yield stability of families from 4x-2x crosses in potato. Euphytica 56: 187195.
  • Ortiz R, Peloquin SK. 1991 a. Breeding for 2n egg production in haploid x species 2x potato hybrids. American Potato Journal 68: 691703.
  • Ortiz R, Peloquin SJ. 1991b. A new method of producing 4x hybrid true potato seed. Euphytica 57: 103107.
  • Ortiz R, Peloquin SJ, Freyre R, Iwanaga M. 1991b. Efficiency of potato breeding using FDR 2n gametes for multi-trait selection and progeny testing. Theoretical and Applied Genetics 82: 602608.
  • Ortiz R, Vorsa N, Bruederle LP, Laverty T. 1992. Occurrence of unreduced pollen in diploid blueberry species, Vaccinium sect. Cyanococcus. Theoretical and Applied Genetics 85: 5560.
  • Parrott WA. 1985. The selection, use, and inheritance of 2n gametes in red clover. Ph D thesis, Univ. Wisconsin, Madison , USA .
  • Parrott WA, Hanneman RE Jr. 1988. Megasporogenesis in normal and a synaptic-mutant (sy-2) of Solanum commersonii Dun. Genome 30: 536539.
  • Parrott WA, Smith RR. 1984. Production of 2n pollen in red clover. Crop Science 24: 469472.
  • Parrott WA, Smith RR. 1986a. Evidence for the existence of Gametes wit/i the somatic chromosome number endosperm balance number in the true clovers (Trifolium spp.) Canadian Journal of Genetics and Cytology 28: 281286.
  • Parrott WA, Smith RR. 1986b. Recurrent selection for 2n pollen formation in red clover. Crop Science 26: 11321135.
  • Parrott WA, Smith RR, Smith MM. 1985. Bilateral sexual tetraploidization in red clover. Canadian Journal of Genetics and Cytology 27: 6468.
  • Peloquin SJ, Chujoy JE, Werner JE. 1992. 4x hybrid progeny from 2x-2x crosses in potato. In: MarianiA, TavolettiS, eds. Gametes with somatic chromosome number in the evolution and breeding of polyploid polysomic species: achievements and perspectives. Perugia, Italy, 2329.
  • Peloquin SJ, Yerk GL, Werner JE, Darmo E. 1989. Potato breeding with haploids and 2n gametes. Genome 32: 10521059.
  • Pfeiffer TW, Bingham ET. 1983. Abnormal meiosis in alfalfa, Medicago saliva: cytology of 2n egg and 4n pollen formation. Canadian Journal of Genetics and Cytology 25: 107112.
  • Pringle GJ, Murray BG. 1992a. Polyploidy and aneuploidy in the tamarillo Cyphomandra betacea (Cav.) Sendt. (Solanaceae), I. Spontaneous polyploidy and features of the euploids. Plant Breeding 108: 132138.
  • Pringle GJ, Murray BG. 1992b. Polyploidy and aneuploidy in the tamarillo Cyphomandra betacea (Cav.) Sendt. (Solanaceae).II. Induction of tetraploidy, interploidy crosses and aneuploidy. Plant Breeding 108: 139148.
  • Pundir RPS, Rao NK, Van Der Maesen LJG. 1983. Induced autotetraploidy in chickpea (Cicer arietinum L.). Theoretical and Applied Genetics 65: 119122.
  • Rabe EW, Haufler CH. 1992. Incipient polyploid speciation in the maidenhair fern (Adiantum pedatum; Adiantaceae). American Journal of Botany 79: 701707.
  • Ramanna MS. 1974. The origin of unreduced microspores due to aberrant cytokinesis in the meiocytes of potato and its genetic significance. Euphytica 23: 2030.
  • Ramanna MS. 1979. A re-examination of the mechanisms of 2n gametes formation in potato and its implications for breeding. Euphytica 28: 537561.
  • Ramanna MS. 1983. First division restitution gametes through fertile desynaptic mutants of potato. Euphytica 32: 337350.
  • Ramanna MS. 1992. The use of 2n-gametes in breeding polysomic polyploid species; some achievements and perspectives. In: MarianiA, TavolettiS, eds. Gametes with somatic chromosome number in the evolution and breeding of polyploid polysomic species: achievements and perspectives. Perugia, Italy, 9199.
  • Ray M, Tokach MK. 1992. Cytology of 2n pollen formation in diploid crested wheatgrass, Agropyron cristatum. Crop Science 32: 13611365.
  • Rhoades MM, Dempsey E. 1966. Induction of chromosome doubling by the elongate gene in maize. Genetics 54: 505522.
  • Roose ML, Gottlieb LD. 1976. Genetic and biochemical consequences of polyploidy in Tragopogon. Evolution 30: 818830.
  • Ross H, Langton FA. 1974. Origin of unreduced embryo sacs in diploid potatoes. Nature 247: 378379.
  • Sala CA, Camadro EL, Salaberry MT, Mendiburu AO. 1989. Cytological mechanism of 2n pollen formation and unilateral sexual polyploidization in Lolium. Euphytica 43: 16.
  • Sato TN, Maceira NO, Lumaret R, Jacquard P. 1993. Flowering characteristics and fertility of interploidy progeny from normal and 2n gametes in Dactylis glomerata L. New Phytologist 124: 309319.
  • Sexton OJ. 1980. Polyploidy in animal evolution. In: LewisWH, ed. Polyploidy, biological relevance. New York : Plenum Press, 379381.
  • Sgorbati S, Masci SM, Soler V, Marchi M. 1989. Rapid cytofluorimetric determination of leaf nuclear DNA content in the polyploid series Ranunculus marsicus (R. auricomus agg., Ranunculaeceae). Plant Systematic and Evolution 167: 219226.
  • Shoemaker-Megalos B, Ballington JR. 1988. Unreduced pollen frequencies versus hybrid production in diploid-tetra-ploid Vaccinium crosses. Euphytica 39: 271278.
  • Shore JS. 1991. Tetrasomic inheritance and isozyme variation in Turnera ulmifolia vars. elegans Urb. and intermedia Urb. (Turneraceae). Heredity 66: 305312.
  • Simpson CE, Davis KS. 1983. Meiotic behaviour of a male fertile triploid Arachis L. hybrid. Crop Science 11: 325327.
  • Singh AK, Moss JP, Smartt J. 1990. Ploidy manipulations for interspecific gene transfer. Advances in Agronomy 43: 199240.
  • Soltis DE. 1984. Autopolyploidy in Tolmiea menziesii (Saxifragaceae). American Journal of Botany 71: 11711174.
  • Soltis DE, Soltis PS. 1989. Genetic consequences of autopolyploidy in Tolmiea (Saxifragaceae). Evolution 43: 586594.
  • Soltis DE, Soltis PS. 1993. Molecular data and the dynamic nature of polyploidy. CRC Critical Reviews in Plant Sciences 12: 243273.
  • Southworth D, Pfahler P. 1992. The effects of genotype and ploidy level on pollen surface sculpturing in maize (Zea mays L.). American Journal of Botany 79: 14181422.
  • Stebbins GL. 1947. Types of polyploids: their classification and significance. Advances in Genetics 1: 403429.
  • Stebbins, GL. 1970. Variation and evolution in plants: Progress during the last twenty years. In: HechtMK. SterreWD, eds. Essays in Honor of Th. Dobzhansky. New York : Plenum Press, 173208.
  • Stebbins GL. 1971. Chromosomal Evolution in Higher Plants. Reading , MA : Addison-Wesley.
  • Stebbins GL. 1975. The role of polyploid complexes in the evolution of North American grasslands. Taxon 24: 91106.
  • Stebbins GL. 1980. Polyploidy in plants: unsolved problems and prospects. In: LewisWH, ed. Polyploidy, biological relevance. New York : Plenum Press, 495520.
  • Stebbins GL. 1985. Polyploidy, hybridization, and the invasion of new habitats. Annals of the Missouri Botanical Garden 72: 824832.
  • Stelly DM, Peloquin SJ. 1985. Screening for 2n female gametophytes, female fertility, and 2x × 4x crossability in potatoes (Solanum spp.). American Potato Journal 62: 519529.
  • Stelly DM, Peloquin SJ. 1986a. Formation of 2n gametophytes in diploid tuber-bearing Solanum. American Journal of Botany 73: 13511363.
  • Stelly DM, Peloquin SJ. 1986b. Diploid female gametophyte formation in 24-chromosome potatoes: genetic evidence for the prevalence of the second meiotic division restitution mode. Canadian Journal of Genetics and Cytology 28: 101108.
  • Stelly DM, Peloquin SJ, Palmer RG, Crane CF. 1984. Mayer's hemalum-methyl salicyclate: a stain-clearing technique for observations within whole ovules. Stain Technology 59: 155161.
  • Tal M. 1980. Physiology of polyploids. In: LewisWH, ed. Polyploidy, biological relevance. New York : Plenum Press, 6175.
  • Tan GY, Dunn GM. 1973. Relationship of stomatal length and frequency and pollen-grain diameter to ploidy level in Bromus inermis Lyess. Crop Science 13: 332334.
  • Tavoletti S. 1991. Cytology of 2n egg production in Medicago saliva ssp. falcata. In: VeronesiF, BullitaS, CareldaS, eds. Ploidy and chromosome manipulation in forage breeding. Proceedings of the 17th Meeting of the fodder crops section of Eucarpia, Alghero, Italy, 14–18 October, 162164.
  • Tavoletti S, Mariani A, Veronesi F. 1991a. Cytological analysis of macro- and microsporogenesis of a diploid alfalfa clone producing male and female 2n gametes. Crop Science 31: 12581263.
  • Tavoletti S, Mariani A, Veronesi F. 1991b. Phenotypic recurrent selection for 2n pollen and 2n egg production in diploid alfalfa. Euphytica 57: 97102.
  • Taylor NL, Wiseman EO. 1985. Methodology and breeding of tetraploid red clover. Proc. of the XV Int. Grassland Cong., 244246.
  • Taylor NL, Wiseman EO. 1987. Triploids and tetraploids from 4x-2x crosses in red clover. Crop Science 27: 1418.
  • Thompson JD, Lumaret R. 1992. The evolutionary dynamics of polyploid plants: origins, establishment and persistence. Trends in Ecology and Evolution 7: 302306.
  • Tomekpe K, Lumaret R. 1991. Association between quantitative traits and allozyme heterozygosity in a tetrasomic species: Dactylis glomerata L. Evolution 45: 359370.
  • Van Dijk P, Hartog M, Van Delden W. 1992. Single cytotype areas in autopolyploid Plantago media L. Biological Journal of the Linnean Society 46: 315332.
  • Van Dijk P, Van Delden W. 1990. Evidence for autotetraploidy in Plantago media and comparisons between natural and artificial cytotypes concerning cell size and fertility. Heredity 65: 344357.
  • Van Santen E. 1988. Germplasm transfer in Dactylis L. PhD thesis, Univ. of Wisconsin, Madison , USA .
  • Van Santen E, Casler MD. 1986. Evaluation of indirect ploidy indicators in Dactylis L. subspecies. Crop Science 26: 848852.
  • Van Santen E, Casler MD. 1990. Forage quality and yield in 4x progeny from interploidy crosses in Dactylis L. Crop Science 30: 3539.
  • Van Santen E, Hugessen PM, Casler MD. 1991. Identification and frequency of tetraploid progeny from 2x-4x and 4x-2x crosses in Dactylis. Genome 34: 273278.
  • Van Tuyl JM, De Vries JN, Bino RJ, Kwakkenbos TAM. 1989. Identification of 2n-pollen producing interspecific hybrids of Lilium by flow cytometry. Cytologia 54: 737745.
  • Veilleux R. 1985. Diploid and polyploid gametes in crop plants: Mechanisms of formation and utilization in plant breeding. Plant Breeding Review 3: 252288.
  • Veilleux RE, Lauer FI. 1981. Variation for 2n pollen production in clones of Solanum phureja Juz. and Buk. Theoretical and Applied Genetics 59: 95100.
  • Veilleux RE, McHale NA, Lauer FI. 1982. Unreduced gametes in diploid Solanum. Frequency and types of spindle abnormalities. Canadian Journal of Genetics and Cytology 24: 301314.
  • Veronesi F, Mariani A, Bingham ET. 1986. Unreduced gametes in diploid Medicago and their importance in alfalfa breeding. Theoretical and Applied Genetics 72: 3741.
  • Veronesi F, Mariani A, Tavoletti S. 1988. Screening for 2n gamete producers in diploid species of genus Medicago. Genet. Agr. 42: 187200.
  • Veronesi F, Mariani A, Tavoletti S. 1989. 2n gametes producers in diploid species of genus Medicago. XVI International Grassland Congress, Nice, France.
  • Veronesi F, Tavoletti S, Mariani A. 1990. Identification of 2n and 4n gamete producers in an experimental population of diploid Medicago. Journal of Genetics and Breeding 44: 143148.
  • Vorsa N, Bingham ET. 1979. Cytology of 2n pollen formation in diploid alfalfa, Medicago saliva. Canadian Journal of Genetics and Cytology 21: 525530.
  • Wagenvoort M, Den Nijs APM. 1992. Implications of 2n-pollen for breeding tetraploid perennial ryegrass. In: MarianiA, TavolettiS, eds. Gametes with somatic chromosome nun/her in the evolution and breeding of polyploid polysomic species: achievements and perspectives. Perugia, Italy, 514.
  • Wagenvoort M, De Vries-Van Hulten M, Winkelhorst GD, Den Nijs APM. 1990. Cytological mechanisms responsible for 2n pollen production and unilateral sexual polyploidization in perennial ryegrass (Lolium perenne). Proceedings of the 16th Meeting of the Fodder Crop Section of Eucarpia, Wageningen, The Netherlands, 18–22 November.
  • Watanabe K, Peloquin SJ. 1989. Occurrence of 2n pollen and ps gene frequencies in cultivated groups and their related wild species in tuber-bearing Solanum. Theoretical and Applied Genetics 78: 329336.
  • Watanabe K, Peloquin SJ. 1991. The occurrence and frequency of 2n pollen in 2x, 4x, and 6x wild, tuber-bearing Solanums species from Mexico, and Central and South America. Theoretical and Applied Genetics 82: 621626.
  • Watanabe K, Peloquin SJ. 1993. Cytological basis of 2n pollen formation in a wide range of 2x, 4x, and 6x taxa from tuber-bearing Solanum species. Genome 36: 813.
  • Watanabe K, Peloquin SJ, Endo M. 1991. Genetic significance of mode of polyploidization: somatic doubling or 2n gametes Genome 34: 2834.
  • Werner JE, Peloquin SJ. 1987. Frequency and mechanisms of 2n egg formation in haploid tuberosum-wild species FI hybrids. American Potato Journal 64: 641654.
  • Werner JE, Douches DS, Freyre R. 1992. Use of half-tetrad analysis to discriminate between two types of 2n egg formation in a potato haploid. Genome 35: 741745.
  • Werner JE, Peloquin SJ. 1991a. Occurrence and mechanisms of 2n egg formation in 2x potato. Genome 34: 975982.
  • Werner JE, Peloquin SJ. 1991b. Yield and tuber characteristics of 4x progeny from 2x × 2x crosses. Potato Research 34: 261267.
  • Werner JE, Peloquin SJ. 1991c. Significance of allelic diversity and 2n gametes for approaching maximum heterozygosity in 4x potatoes. Euphytica 58: 2129.
  • Winge O. 1917. The chromosomes. Their numbers and general importance. Carlsberg. Lab., Copenhagen C.R. Trav. 13: 131275.
  • Wolf PG, Soltis DE, Soltis PS. 1990. Chloroplast-DNA and allozymic variation in diploid and autotetraploid Heuchera grossullariifolia (Saxifragaceae). American Journal of Botany 77: 232244.
  • Zhang G, Campenot MK, McGann LE, Cass DD. 1992. Flow cytometric characteristics of sperm cells isolated from pollen of Zea Mays L. Plant Physiology 99: 5459.
  • Zhang Y, Lespinasse Y, Salesses G. 1988. Mise en evidence de quelques anomalies méïotiques conduisant à la formation de gametes mâles non réduits chez le pommier cultivé(Malux×domestica Borkh.). Cytologia 53: 749755.
  • Zohary D, Nur U. 1959. Natural triploids in the orchard grass, Dactilis glomerata L., polyploid complex and their significance for gene flow from diploid to tetraploid levels. Evolution 13: 311317.