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Paradoxical polyemb...
Paradoxical polyembryony? Embryonic cloning in an ancient order of marine bryozoans
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Hughes, R. N. (författare)
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D'Amato, M. E. (författare)
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Bishop, J. D. D. (författare)
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visa fler...
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Carvalho, G. R. (författare)
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Craig, S. F. (författare)
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- Hansson, Lars Johan (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för marin ekologi,Department of Marine Ecology
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Harley, M. A. (författare)
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Pemberton, A. J. (författare)
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visa färre...
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(creator_code:org_t)
- 2005
- 2005
- Engelska.
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Ingår i: Biology Letters. - 1744-9561. ; 1:2, s. 178-180
- Relaterad länk:
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https://gup.ub.gu.se...
Abstract
Ämnesord
Stäng
- Prolific polyembryony is reported in few major taxa, but its occurrence has generated theoretical debate on potential conflict between sexual and asexual reproduction. It is, therefore, important to genetically confirm a widely cited inference, based on microscopy, that polyembryony characterizes marine bryozoans of the order Cyclostomata. Microsatellite genotyping of brooded embryos and maternal colonies conclusively demonstrated polyembryony, while genetic variation among broods within colonies indicated outcrossing via water-borne sperm, in the rocky-shore species Crisia denticulata. The characteristically voluminous brood chamber of cyclostomes is judged to be an adaptation linked to larval cloning and hence an indicator of polyembryony. We speculate that although the almost universal occurrence of polyembryony among crown-group Cyclostomata is probably attributable to phylogenetic constraint, adaptive consequences are likely to be significant.
Ämnesord
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Nyckelord
- clonal reproduction
- cross-fertilization
- larvae
- microsatellites
- phylogenetic constraint
- cyclostome bryozoans
- hypothesis
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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