S sub(1)selection for early maturity in an open pollinated maize variety and its effect on other important characters
2004
Mosisa Worku (Bako Agricultural Research Center, Bako (Ethiopia)) | Hadji Tuna (Bako Agricultural Research Center, Bako (Ethiopia)) | Dagne Wagary (Bako Agricultural Research Center, Bako (Ethiopia)) | Legese Wolde (Bako Agricultural Research Center, Bako (Ethiopia)) | Wonde Abera (Bako Agricultural Research Center, Bako (Ethiopia))
Two cycles of S sub(1)selection were applied to the open-pollinated maize (Zea mays L.)variety, Beletech. The objective of this research was to develop an earlier version of Beletech without decreasing grain yield. The method included development of St lines, testing of S sub(1)lines across locations, selection among St lines and recombination of the selected lines. Progress made was evaluated by testing the two cycles of Beletech (Beletech C sub(1)and Beletech C sub(2)) and other elite maize populations across locations in a randomised complete block design. Analysis of variance for days to silking showed significant differences (P less than or equal to 0.05)among the genotypes. The two cycles of selection resulted in a reduction in days to silking (6.28%), more grain yield (6.92%)and a lower ear height (12.84%). This indicated that the S sub(1)selection had been successful in increasing the frequencies of the favourable alleles at those loci affecting grain yield in line with improving for early maturity. In addition, the improved version of Beletech could be a good source of lodging and inbreeding depression resistant lines.
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