Molecular genetics and speciation in Elliptio and its relationships to other taxa of North American Unionidae (Bivalvia)

摘要: The genetic relationships among 30 populations of 11 species and five genera North American Unionidae were assessed by using standard allozyme procedures. Emphasis was on Elliptio Fusconaia. Multi-dimensional scaling based a matrix Nei's (1972) distances substantiated the immunoelectrophoretic results Davis&Fuller 1981, which demonstrated distinct divergent taxonomic groups Anodontinae, Margaritiferinae, Ambleminae, plus die close relationship Fusconaia, justifies their inclusion within same tribe. Genetic distance appears to increase regularly with time since divergence taxa. E. complanata group is an apparently recent radiation probably actively radiating today. I values this range from 0.90 0.99. Considerable heterozygosity, numerous polymorphic loci, much interpopuladon phenotypic diversity also recorded for group. Some taxa mat have been considered synonyms are be valid species. Reasons low unionid discussed. Standard analyses shown great value assessing