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Genetic control of diaphorase and phosphoglucomutase isozyme variants in hexaploid oat



Genetic control of diaphorase and phosphoglucomutase isozyme variants in hexaploid oat



Journal of Heredity 85(4): 303-306



Inheritance of diaphorase and phosphoglucomutase isozyme variants was investigated in nine F-2 populations of hexaploid oat (Avena spp.) using starch gel electrophoresis. Three independent diaphorase loci-Dia-1, Dia-2, and Dia 3-were hypothesized to determine eight zymogram phenotypes. An active (Dia-1) and a null (dia-1) allele were found at the Dia-1 locus, in agreement with a previous study Allele Dia-2 was assumed to be fixed at the second locus, and codominant alleles (Dia-3a and Dia-3b) and a null allele (dia-3) were found at the Dia-3 locus. Three independent phosphoglucomutase loci-Pgm-1, Pgm-2, and Pgm-3-were hypothesized to determine seven zymogram phenotypes. Allele Pgm-1 was assumed to be fixed at the first locus, and codominant (Pgm-2a and Pgm-2b) alleles and a null (pgm-2) allele were found at the Pgm-2 locus. Codominant (Pgm-3a and Pgm-3b) alleles and a null (pgm-3) allele were found at the Pgm-3 locus. Comigration of alleles Pgm-2b and Pgm-3a was observed. Allelic frequencies in cultivated and wild oat were compared, based on an interpretation of zymograph phenotypes of 1,410 hexaploid oat accessions from previous studies.

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Accession: 002390533

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