aAuthor for correspondence. E-mail: mike_hart@sfu.ca
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Allelic inheritance in naturally occurring parthenogenetic offspring of the gonochoric sea star Patiria miniata
Article first published online: 11 MAR 2009
DOI: 10.1111/j.1744-7410.2008.00165.x
© 2009, The Authors. Journal compilation © 2009, The American Microscopical Society, Inc.
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How to Cite
Sunday, J., Raeburn, L., Stewart, H. and Hart, M. W. (2009), Allelic inheritance in naturally occurring parthenogenetic offspring of the gonochoric sea star Patiria miniata. Invertebrate Biology, 128: 276–282. doi: 10.1111/j.1744-7410.2008.00165.x
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aAuthor for correspondence. E-mail: mike_hart@sfu.ca
Publication History
- Issue published online: 14 SEP 2009
- Article first published online: 11 MAR 2009
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Keywords:
- 1-methyladenine;
- automixis;
- thelytoky;
- mating systems
Abstract. In laboratory studies of fertilization using the gonochoric broadcast-spawning asterinid sea star Patiria miniata, we found many cases in which some mature eggs spawned by females formed cleavage-stage embryos and feeding bipinnaria larvae without fertilization by sperm. Segregation of maternal microsatellite alleles among the parthenogenetic offspring of known heterozygous females was consistent with several specific modes of asexual reproduction, including polar body suppression. Cryptic outcrossing by sperm contamination was ruled out by the failure to observe non-maternal alleles. The potential for asexual reproduction by the normally outcrossing members of P. miniata may suggest a shared propensity for asexuality among asterinid species from several clades in which isolated adults can produce offspring without outcrossing.