ESTIMATION OF GENETIC PARAMETERS USING FIVE POPULATIONS OF SOME BREAD WHEAT CRESSES | ||
| Journal of Plant Production | ||
| Article 3, Volume 31, Issue 8, August 2006, Pages 4863-4871 PDF (114.98 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2006.236075 | ||
| Author | ||
| Sabah H. Abo Elala, | ||
| National Wheat Res. Program, Field Crops Res. Inst., Agri. Res. Center | ||
| Abstract | ||
| Two experiments were carried out using two crosses namely Giza 168 x Gemmeiza 7 and lrina x Sids 1. Five populations (P1, P2, F1, F2 and F3) for each cross were used in this investigation. Significant positive heterotic effects were obtained for number of spikesfplant and grain yieldipiant in the first cross. On the other hand, significant negative heterotic effects were found for number of kernelsfspike, number of spikes per plant and grain yield per plant in the second cross Over dominance towards the higher parent for number, of kernelsfspike and grain yield per plant observed in the first cross. inbreeding depression estimates were found to be significant for all studied attributes except for number of spikesfplant and grain yieldfplant in the first cross. On the other side inbreeding depression were significant negative for kernel weight in the second cross. F2 deviation (E1) were significant for all studied characters for two crosses except for number of spikeslplant and grain yieldfplant in the first cross. Moreover, F3 deviation (E2) were significant for all studied characters in two crosses except for grain yieldfplant in the first cross. The (additive — additive x dominance) gene effect was significant for all studied characters in two crosses. These results suggest the potential for obtaining further improvement in most studied characters. in addition, dominance and epistasis were found to be significant for most of the studIed attributes. High to medium values of heritability estimates were found to be associated with high and moderate expected and actual grain in most characters. This obtained results indicated that selection for the studied characters could be used in the early generations but may more effective if post poned to late one. These study concluded that it may be take in considration the first cross (Giza 168 x Gm. 9) to improve the breeding program in the national wheat research program. | ||
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