Aspartate aminotransferase allozyme variation in a germplasm collection of the domesticated lentil (Lens culinaris)

• Published in: Theoretical and applied genetics 1984-08, Vol.68 (5), p.441-448
• Main Authors: Skibinski, D.O.F, Rasool, D, Erskine, W
• Format: Article
• Language: English
• Subjects: Agronomy. Soil science and plant productions; aspartate aminotransferase; Biological and medical sciences; Classical and quantitative genetics. Population genetics. Molecular genetics; Fundamental and applied biological sciences. Psychology; Generalities. Genetics. Plant material; Genetics and breeding of economic plants; Genetics of eukaryotes. Biological and molecular evolution; geographical variation; germplasm; Lens culinaris; loci; Population genetics, reproduction patterns; yields
• ISSN: 0040-5752; 1432-2242
• DOI: 10.1007/BF00254816

Variation at a polymorphic Aspartate aminotransferase locus was assayed in a sample of 298 accessions from the ICARDA germplasm collection of the domesticated lentil (Lens culinaris). Two alleles Aat-1 (F) and Aat-1 (S) were detected with global frequencies of 0.51 and 0.49, respectively. Fifty-nine percent of accessions were polymorphic for both alleles. The frequency of outcrossing was estimated from the observed heterozygosity to be about 1%. This is higher than direct estimates of outcrossing and implicates selection in favour of heterozygous gene combinations. Significant variation in allele frequency and in the occurrence of polymorphic accessions was observed between countries or geographic areas. Significant associations were observed between the allozymes and agronomic characters. In particular high frequency of Aat-1 (F) appeared to be associated with late flowering and maturity and low yield.