Genetic structure in the perennial grasses Lolium perenne and Agrostis curtisii

Article Abstract:

Perennial ryegrass and bristle-leaved bent were studied for genetic variation. Approximately 30 populations of each species were analyzed from 7 and 5 regions, respectively, across southern Britain. For bristle-leaved bent, results suggest populations from nearby regions showed greater similarity than those from farther away. Ryegrass, an agricultural species, showed the reverse. This major interruption of genetic variation occurred without significant ecological consequences.

Grasses

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Allozyme diversity and genetic structure of European populations of Sorbus aucuparia L. (Rosaceae: Maloideae)

Article Abstract:

Populations of European rowan trees have been examined for gene flow and colonization patterns. A selection of 6 enzymes were chosen for study in 17 populations ranging from Finland to the Pyrenees. Gene flow estimates and distances between pairs of populations correlated significantly. Finnish populations showed the greatest genetic differentiation from southern populations.

Trees, Trees (Plants)

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Genetic differentiation and relationship between genetic and geographical distance in Danish sea trout (Salmo trutta L.) populations

Article Abstract:

Tissue samples from brown trout distributed over four river systems were genetically analyzed. The 24 samples were divided into 3 phylogenetic groups, suggesting populations within river systems tended to be more closely related to each other than to populations from other systems. Distance has been seen as a significant factor in limiting gene flow.

Mitochondrial DNA, Trout

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