Identification of random amplified polymorphic DNA (RAPD) markers highly linked to sex determination in the red alga Gracilaria gracilis

Authors

  • E. A. Martinez,

    Corresponding author
    1. Laboratoire de Génétique et Evolution des Populations Végétales, UPRESA CNRS 8016, GDR 1002, FR 1818, Université des Sciences et Technologies de Lille I, Bât. SN2, 59655 Villeneuve d’Ascq Cedex, France
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  • C. Destombe,

    1. Laboratoire de Génétique et Evolution des Populations Végétales, UPRESA CNRS 8016, GDR 1002, FR 1818, Université des Sciences et Technologies de Lille I, Bât. SN2, 59655 Villeneuve d’Ascq Cedex, France
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  • M. C. Quillet,

    1. Laboratoire de Génétique et Evolution des Populations Végétales, UPRESA CNRS 8016, GDR 1002, FR 1818, Université des Sciences et Technologies de Lille I, Bât. SN2, 59655 Villeneuve d’Ascq Cedex, France
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  • M. Valero

    1. Laboratoire de Génétique et Evolution des Populations Végétales, UPRESA CNRS 8016, GDR 1002, FR 1818, Université des Sciences et Technologies de Lille I, Bât. SN2, 59655 Villeneuve d’Ascq Cedex, France
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  • *

    Present addresses:Departamento de Ecología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Casilla 114-D, Santiago, Chile;†Equipe de Physiologie et Morphogenèse Végétale, USTL-INRA, Université des Sciences et Technologies de Lille I, Bât. SN2, 59655 Villeneuve d’Ascq Cedex, France.

M. Valero. Fax: +33 3 20 43 69 79; E-mail:myriam.valero@univ-lille1.fr

Abstract

The random amplified polymorphic DNA (RAPD) technique was employed in the haplo-diploid dioecious species Gracilaria gracilis to identify sex-linked PCR markers. Sixty-nine decamer oligonucleotide primers were tested on two bulks of DNA, one from five haploid males and the other from five haploid females. One of these primers (OPD13) generated a 430-bp fragment specific to males and a 620-bp fragment specific to females. The diploid individuals (tetrasporophytes) showed the co-occurrence of these two fragments. In order to verify the linkage between the sexual phenotypes and these markers, a progeny array of 59 haploid individuals (male and female) born on a diploid individual was analysed, in all of which the two markers produced by the OPD13 primer segregated perfectly with sex.

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