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The Apportionment of Genetic Variation Within and Among Populations of Desmodium nudiflorum

Barbara A. Schaal and William G. Smith
Evolution
Vol. 34, No. 2 (Mar., 1980), pp. 214-221
DOI: 10.2307/2407385
Stable URL: http://www.jstor.org/stable/2407385
Page Count: 8
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The Apportionment of Genetic Variation Within and Among Populations of Desmodium nudiflorum
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Abstract

The apportionment of genetic variation within and among populations of Desmodium nudiflorum (L) DC was determined. Allozyme frequencies within populations conform to Hardy-Weinberg expectations and no population substructure was detected. Within populations FST values average 0.015 and are not significant. Most of the genetic diversity within a population, 75%, is due to differences between individuals rather than differences between subpopulations. In contrast, there is significant genetic differentiation between populations. Standardized genetic variances average 0.165 Each population contains a unique set of polymorphic loci; loci which are polymorphic in more than one population have significant differences in gene frequencies. A large portion of the genetic diversity of the species, 47.4%, is not represented within individual populations. Genetic distances between populations average 0.014 and are independent of geographical distance. The genetic structure of D. nudiflorum is most similar to a random patchwork.

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