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- W2051223369 abstract "Summary The sea anemone genus Epiactis provides an unusually good opportunity to study the evolution of brooding and mating systems. The four Epiactis species on the Pacific coast of North America all brood their offspring up to the juvenile stage, but each has a different combination of internal vs. external brooding and gonochory vs. simultaneous or gynodioecious hermaphroditism. Two of the four species (E. prolifera and E. lisbethae) were indistinguishable with allozymes (20 loci), but could be differentiated using multilocus DNA fingerprinting. Phylogenetic analyses of the allozyme data by distance and parsimony methods using three outgroups suggest that the four nominal Epiactis species are polyphyletic, with the two internal brooders evolving independently of the two external brooders. This topology does not allow inferences about the evolutionary order of hermaphroditism, dioecy and gynodioecy. Separate sexes and obligate outcrossing are of ten believed to be ancestral, with hermaphroditism and the potential for self-fertilization being favored in taxa where restricted dispersal promotes inbreeding. Previous studies of population genetic structure in these Epiactis species is consistent with this hypothesis, as even the cross-fertile species were highly inbred." @default.
- W2051223369 created "2016-06-24" @default.
- W2051223369 creator A5029684871 @default.
- W2051223369 date "1996-12-01" @default.
- W2051223369 modified "2023-09-27" @default.
- W2051223369 title "The evolution of mating systems in a group of brooding sea anemones (Epiactis)" @default.
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- W2051223369 doi "https://doi.org/10.1080/07924259.1996.9672549" @default.
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