Heterotic pattern in su1 sweet corn hybrids originating from native breeds
DOI:
https://doi.org/10.29312/remexca.v15i8.3844Keywords:
ASCA, Ducillo del Noroeste, genetic improvement, GCAAbstract
The introgression of genes originating from native Maíz Dulce breeds from Mexico to non-sweet parent lines was carried out; as a hypothesis, the use of recurrent selection is an alternative for the transfer of the sweetness gene to non-sweet lines for the formation of hybrids. In the research, we look for parent lines with general and specific combining ability with the aim of creating a heterotic pattern for the formation of sweet corn hybrids with su1 sweetness gene because in Mexico there is no seed production of this genetic material. Lines CML311, CML78, LUG282, LUG03, and LUG20 and the breeds Dulcillo del Noroeste and Maíz Dulce. Genetic crossbreeding designs, line by progeny tester and North Carolina Design II; we measured the effects of general and specific combining ability of lines and crosses; a combined analysis of variance of three evaluations in two evaluation cycles and multiple selection indices of the variables of the best crosses were performed to establish heterotic groups; years of evaluation, from 2017 to 2021 in Zapopan, Jalisco. In conclusion, we found three parent lines that belong to the maternal heterotic group with germplasm of Dulcillo del Noroeste and LUG282 and four parent lines for the paternal heterotic group with germplasm of maize dulce and CML311. The results showed a contribution to the transfer of the su1 sweetness gene to non-sweet lines; the hybrid crosses developed presented quality in plant and ear.
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