Separation of epistatic, additive and dominant effects on corn.
DOI:
https://doi.org/10.15517/am.v13i1.12231Abstract
The inheritance of host to stunt maize was studied
under natural field conditions. Inbred lines P1 (moderately
resistant) and P2 (susceptible) and their F1, F2, [BC(P1) and
BC(P2)] progenies were evaluated at two seasons at sea level,
in Veracruz in 1999. Significant epistatic effects were noted
to the resistance to stunt corn; however, the dominant
genetics effects were greater and more important than
additive and epistatic effects. The data showed that resistance
to stunt corn was controlled by only a few major genes. The
F1 hybrid showed high tolerance, indicating dominance and
mid-parent heterosis for resistance was also observed. The
data indicate that a back-crossing procedure can be used to
transfer the resistance factors into elite lines. Some form of
recurrent selection in populations having a degree of
resistance also is suggested.
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