Testing of Combining Ability of Early Maturity Maize Inbred Lines
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Abstract
The objective of this study was to evaluate combining ability of early maturity maize inbred lines developed from DOA using line x tester mating design. One hundred and twenty crosses were obtained from 60 inbred lines and 2 testers. The experimental design was 10 x 13 Alpha Lattice with two replications tested in 2023 dry season. The crosses were tested with two elite hybrids and eight commercial hybrids. NS5 was used as check variety. The results showed that four testcross hybrids namely Nei641045 x Nei532005 (1,596 kg/rai), Nei641049 x Nei532005 (1,539 kg/rai), Nei641004 x TF5 (1,457 kg/rai) and Nei641013 x TF5 (1,441 kg/rai) gave a higher yield than NS5 (1,245 kg/rai). Furthermore, the testcross hybrids namely Nei641045 x Nei532005, Nei641049 x Nei532005 and Nei641004 x TF5 had lower seed moisture content than NS5 (38.34%). Seed moisture content of the hybrids were 34.44 34.85 and 35.22%, respectively. Eleven early maturity maize inbred lines namely Nei641045, Nei641004, Nei641012, Nei641013, Nei641049, Nei641044, Nei641050, Nei641040, Nei641016, Nei641056, and Nei641020 had good general combining ability which are suitable for use as testers for yield evaluation.
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