Evaluation of tropical maize (Zea mays) inbred lines as sources of favorable alleles to improve elite single corn hybrids.
Keywords:Lines, progenitors, hybrids, favorable alleles.
Progenitors of three single corn hybrids were
crossed with 23 lines with the purpose of identifying donor
lines for improving grain yield of AN1 x AN2, SSE232-33-30
x SSE255-18-19 and SSE255-18-19 x M.L.S4-1. Lines per se
and their crosses among hybrid parents were evaluated
separately in three environments in Mexico during 1997.
Statistically-significant differences for grain yield among
donor lines for minimally-based estimations of favorable
alleles μG and μ were found. The highest values of
favorable alleles were detected in three tropical lines
CML258, CML264 and CML273 and three subtropical
CML311, CML312 and CML319. The improvement of grain
yield in each elite hybrid appears possible with several donor
lines. The modified procedure of identify donor lines of
favorable alleles μ , showed more efficiency than μG
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