Article Abstract:
Population disjunction on isozyme variation and its effects have been studied in the widespread Pilgerodendron uviferum. It was concluded that total range, along with information on the degree of among-population isolation, may be a better predictor of levels of polymorphism than range size by itself. In 20 populations along the total range, eleven of the 14 putative genetic loci were polymorphic in at least one population and six of them were polymorphic in more than one population.
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Article Abstract:
Microsatellite variation in solitary and social tuco-tucos, ctenomyid rodents of Argentina, has been studied with emphasis on molecular properties and population dynamics. The role of microsatellite structure in generating differences was assessed. It appears that structural properties of microsatellite markers may give important insights into the population-level processes underlying the variation. The less social species is Ctenomys haigi and the more social one is C. sociabilis.
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Article Abstract:
Haplotype frequency distribution and discriminatory power of two mtDNA fragments has been studied in a marine pelagic teleost, Atlantic herring. Data suggest that the very skewed haplotype distribution of many mtDNA markers may be one of the reasons for the more infrequent detection of population differentiation compared to microsatellites.
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