Genetic relationships of several Amblemini species (Bivalvia : Unionidae)in Arkansas

摘要

Allozyme analysis of 16 loci was utilized to determine the genetic relationships for four species of mussels in the Tribe Amblemini (Amblema plicata plicata (Say), Plectomerus dombeyanus (Valenciennes), Quadrula pustulosa pustulosa (I. Lea), and Q. quadrula (Rafinesque)). Conspecific genetic distance was quite low between populations for each species, with ranges of 0.012-0.113. The congeneric distance for Q. p. pustulosa and Q. quadrula was determined to be 0.333. Distances between genera ranged from 0.396 to 0.787, similar ranges to those of other unionid species studied. Genetic distance of Amblema and Plectomerus was greater than that expected based on previous studies, with Plectomerus more closely related to Quadrula than to Amblema.