Estimation of genetic variance in open pollinated variety with reference to expected grain from selection [Egypt]
1986
El-Hosary, A.A. (Zagazig Univ., Moshtohor (Egypt). Faculty of Agriculture)
Additive (QA2), dominance (QD2) variances and expected advances from different methods of selection for grain yield were calculated within the adapted Egyptian open-pollinated variety of maize "American Early" by using Design I. Data were collected on grain yield per plant (g) plant and ear heights (cm) ear length, ear diameter (cm) number of rows per ear, and number of kernels per row. QA2 was significant and greater than QD2 for all the studied traits. QD2 was insignificant for all the studied characters. High heritability values were detected for all traits. The predicted genetic advance per cycle for improvement of the variety under study using mass selection one six, modified ear to row selection, half-sib family selection, full-sib family selection, progeny test and S1 family selection were, 8.34, 3.52, 5.4, 13.2, 14.09 amd 16.6% respectively. The S1 family, full-sib family and test cross were the best methods to improve the variety under study.
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