Gene exchange in a ground cricket hybrid zone

Article Abstract:

Random amplification of polymorphic DNA (RAPD) markers helps analyze the genetic aspects of two species of crickets, Allonemobius fasciatus and Allonemobius socius. These markers suggest a limited gene flow between A. socius and A. fasciatus and indicate that the two species form different taxa. The data based on these studies concur with those based on allozyme marker assays. However, the RAPD assay is a more efficient technique, the sensitivity increasing with the number of diagnostic fragments.

Crickets

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Genetic regulation of border zone formation in female mastomys (Praomys coucha) adrenal cortex

Article Abstract:

A single autosomal recessive gene, bzf, controls border zone formation in the adrenal cortex of the female wild-colored inbred mastomys, Praomys coucha strain, MWC. The genetic analysis of F(sub 1), F(sub 2), and the backcross progenies between MWC and the chamois-colored inbred strain MCC indicates that border formation is 0% in F(sub 1) females. Border zone formation is 25.8% in the F(sub 2) females, 0% in backcross females between F(sub 1) and MCC, and 47.7% in females between F(sub 1) and MWC.

Research, Genetic regulation, Adrenal cortex

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Separating the wheat from the chaff: patterns of genetic differentiation in high gene flow species

Article Abstract:

Various statistical methods can be used to maximize the signal-to-noise ratio in genetic studies of marine species and analyze patterns of genetic differentiation in high gene flow organisms. However, statistical tests alone are not enough to guide decisions about identification and management of stocks of marine species. A quantitative method is proposed to correct for bias arising from a common sampling problem by understanding the biology and life history of the target species.

Models, Biodiversity, Biological diversity conservation, Biodiversity conservation, Species diversity, Population genetics, Marine biology, Gene frequency

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