COMBINING ABILITY OF NINE WHITE MAIZE INBRED LINES FOR YIELD AND SOME AGRONOMIC TRAITS | ||
| Menoufia Journal of Plant Production | ||
| Article 1, Volume 2, Issue 5, September and October 2017, Pages 407-417 PDF (438.2 K) | ||
| Document Type: original papers | ||
| DOI: 10.21608/mjppf.2017.176293 | ||
| Authors | ||
| A.K. Mostafa; M.A.A. Mostafa | ||
| Maize Res. Dep., Field Crops Res. Institute, ARC | ||
| Abstract | ||
| Combining ability analysis was conducted for grain yield, yield components and some agronomic traits, i.e. days to 50% silking, plant and ear heights in a half- diallel cross system involving nine white maize inbred lines. The results indicated that variance due to both general (GCA) and (SCA) specific combining ability was highly significant for all studied traits, indicating the importance of both additive and non-additive gene effects in the inheritance of studied traits. The magnitude of the ratio of general to specific combining ability variance (δ2 GCA, δ2 SCA) indicated that the additive was more important than non-additive gene action in the inheritance of studied traits. Estimation of GCA effects of parents revealed that, parent P2, P3 and P9 were the best combiner for grain yield and some of its components, while the best general combiner for earliness were P1, P7 and P8. The best crosses P1 X P9 and P3XP9 had the positive SCA effects and the highest performance for grain yield. Such suppression inbred lines and crosses can be utilized in the national hybrid breeding program to produce high yielding hybrids. | ||
| Keywords | ||
| White maize; GCA; SCA; Additive; Non-additive variance | ||
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