Rr. Matiello et al., GENETIC-VARIABILITY THROUGH ISOZIMIC POLYMORPHISMS IN HEXAPLOID OATS, Pesquisa agropecuaria brasileira (1977), 33(6), 1998, pp. 913-918
Analysis of isozymes have many applications in plant breeding speciall
y in the study of genetic variability. Isozymes are direct product of
genic expression and may help to understand the evolutionary relation
between species, and allow to identify the potential genotypes for bre
eding programs. This work aimed to identify genetic variability throug
h esterase polymorphism and to estimate genetic similarity among three
hexaploid oat groups. Nine cultivated oat genotypes, three introducti
ons of A. sterilis L., and 16 introductions of A. fatua L. were used.
Wide polymorphisms of isozyme were observed within and between studied
groups. The electrophoretic analysis showed 13 different bands with a
nodical migration between the genotypes. Although several bands were c
ommon for all genotypes, some of them were typical for a particular he
xaploid group. These results indicate high genetic similarity between
cultivated oat and A. fatua group. The A. sterilis group was more dive
rgent, due to a more differentiated electrophoretic pattern.