Evidence of amictic reproduction in the brittle-star Ophiomyxa brevirima |
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| Authors: | F K Garrett P V Mladenov G P Wallis |
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| Institution: | (1) Department of Zoology, University of Otago, P.O. Box 56, Dunedin, New Zealand, NZ;(2) Center for Gene Research, University of Otago, P.O. Box 56, Dunedin, New Zealand, NZ;(3) Department of Marine Science, University of Otago, P.O. Box 56, Dunedin, New Zealand, NZ |
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| Abstract: | Ophiomyxa brevirima is a direct-developing species of brittle-star found around the coast of New Zealand. The mode of reproduction of this ophiuroid
was studied using isozyme electrophoresis of mother and brooded offspring. Multi-locus assessment of the genotypes of 35 adult
females and their brooded offspring was undertaken. A minimum of 45% of broods assessed showed evidence of amictic reproduction,
with all offspring in these broods possessing genotypes that were identical to the genotype of their heterozygous mother.
In most other broods there was evidence of segregation. These observations are interpreted as evidence of both sexual and
asexual reproduction in this ophiuroid species.
Received: 19 November 1996 / Accepted: 28 January 1997 |
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