Unusual intraindividual variation of the nuclear 18S rRNA gene is widespread within the acipenseridae

Article Abstract:

A survey of almost all Eurasian acipenseriform species was conducted for examining 18S rDNA variation for investigating the hypothesis that intraindividual variation originated after the evolutionary split between Acipenseridae and Polyodontidae. A discussion is presented on the results obtained from the survey and the variation observed in the two segments of 18S rRNA gene in relation to acipenseriform rDNA evolution and evolutionary relationships within the Acipenseriformes.

New York, Polymerase chain reaction, RNA, Actinopterygii

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Genetic divergence of Connecticut Melanoplus femurrubrum populations

Article Abstract:

Melanoplus femurrubrum populations were surveyed within the state of Connecticut for genetic diversity at multiple genetic markers including three mitochondrial and one nuclear gene regions. Estimates of genetic diversity revealed higher mitochondrial diversity in the northern region but nearly equal diversity for the internal transcribed spacers for the ribosomal DNA cluster gene.

Connecticut, Usage, Genetic markers, Grasshoppers

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Population genetic variation and structure of the invasive weed Mikania micrantha in Southern China: consequences of rapid range expansion

Article Abstract:

A perennial creeping vine called Mikania micrantha in southern China was used to study genetic consequences of populations with rapid range expansion. Substantial amounts of intraspecific and within-population variation were revealed and it was interpreted that multiple introductions played a major role in spreading these invasive plants.

China, Growth, Weeds, Company growth, Intraspecific genetic variation

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