科研之友
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摘要
the genetics of resistance to stem rust was determined in three resistant oat genotypes (karma, avemex and calandria) by analysis of progenies derived from their crosses with the susceptible varieties chihuahua and opalo. segregation in the f3 generations of karma progeny was adjusted to two dominant complementary genes (1:8:7, for resistant, segregating and susceptible). for avemex, the phenotypic ratio for the same generations was 1:2:1 indicating the presence of a dominant gene. the calandria progeny segregated in the phenotypic proportion of 3:1 of resistant and susceptible, which indicates that in this progenitor one dominant gene confers resistance.
