High levels of shared allozyme polymorphism among strongly differentiated congeneric clams of the genus Astarte (Bivalvia: Mollusca)
Article Abstract:
High levels of shared allozyme polymorphism have been found in three species of strongly differentiated congeneric clams of the Astarte genus. Biochemical genetic variation at 12 allozyme loci has been studied in the sympatrically occurring species from one location off the coast of Newfoundland, on the east coast of Canada. Time of speciation events seems consistent with the period proposed for rapid speciation in North Atlantic bivalves after major extinction event. Allozyme variation in the species was only related to allele frequency differences. No absolute, or fixed, differences were seen. Absence of diagnostic allelic differences is quite unusual.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Population structure in a south-eastern US freshwater fish, heterandria formosa. II. Gene flow and biogeography within the St. Johns river drainage
Article Abstract:
A research study was conducted to examine the patterns of gene flow at a fine scale with the St. Johns River drainage to test the predictions that the value within a drainage should be equal or greater than that among drainages. Four isozyme systems were used to characterize population structure and gene flow. The results showed no isolation by distance within two forks of the St. Johns drainage, but significant differentiations were apparent between two forks.
Publication Name: Heredity
Subject: Biological sciences
ISSN: 0018-067X
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Oxidative modification of a Cephalosporin C acylase from Pseudomonas strain N176 and site-directed mutagenesis of the gene
- Abstracts: Discriminant analysis of ribotype profiles of Escherichia coli for differentiating human and nonhuman sources of fecal pollution
- Abstracts: Associative overdominance, heterozygosity and fitness. Microsatellite polymorphism and genetic impact of restocking in Mediterranean brown trout (Salmo trutta L.)
- Abstracts: Allozyme diversity and genetic structure of European populations of Sorbus aucuparia L. (Rosaceae: Maloideae)