<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Genetic diversity was analyzed in 19 ecotypes of the diploid oat <italic>A. strigosa</italic> originating from various geographical regions of the world. Six isoenzyme systems (AAT, ACP, EST, LAP, MDH, PX) were studied and 16 loci were identified. Only two loci (<italic>Est4</italic> and <italic>Mdh2</italic>) were polymorphic. Ecotypes were characterized by the percentage of polymorphic loci (P=3.3%), the mean number of alleles per locus (A=1.04) and intrapopulation diversity (HS=0.013). Total genetic diversity (HT=0.07) and interpopulation diversity (DST=0.057) were examined as well. The value of the coefficient of gene differentiation (GST=0.821) indicated that diversity among populations was an important contributor to total variability. Genetic similarity between <italic>A. strigosa</italic> populations was very high (IN=0.94). Cluster analysis did not demonstrate strongly differentiated groups among the ecotypes examined.</abstract>

Genetic diversity was analyzed in 19 ecotypes of the diploid oat A. strigosa originating from various geographical regions of the world. Six isoenzyme systems (AAT, ACP, EST, LAP, MDH, PX) were studied and 16 loci were identified. Only two loci (Est4 and Mdh2) were polymorphic. Ecotypes were characterized by the percentage of polymorphic loci (P=3.3%), the mean number of alleles per locus (A=1.04) and intrapopulation diversity (HS=0.013). Total genetic diversity (HT=0.07) and interpopulation diversity (DST=0.057) were examined as well. The value of the coefficient of gene differentiation (GST=0.821) indicated that diversity among populations was an important contributor to total variability. Genetic similarity between A. strigosa populations was very high (IN=0.94). Cluster analysis did not demonstrate strongly differentiated groups among the ecotypes examined.

Genetic diversity of <italic>Avena strigosa</italic> Schreb. ecotypes on the basis of isoenzyme markers

Department of Medical Biology, University of Warmia and Mazury in Olsztyn, Żołnierska 14c, 10-561 Olsztyn, Poland

Biodiversity Research and Conservation

Genetic diversity of  Schreb. ecotypes on the basis of isoenzyme markers

Genetic diversity was analyzed in 19 ecotypes of the diploid oat A. strigosa originating from various geographical regions of the world. Six isoenzyme systems...

Genetic diversity of Avena strigosa Schreb. ecotypes on the basis of isoenzyme markers

Publié en ligne: 25 oct. 2010

Pages: 23 - 28

DOI: https://doi.org/10.2478/v10119-009-0013-3

Mots clés
isozyme, genetic diversity, genetic similarity, plant germplasm

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