ANALYSIS OF YIELD AND ITS COMPONENTS USING FIVE PARAMETERS FOR THREE BREAD WHEAT CROSSES | ||
| Egyptian Journal of Agricultural Research | ||
| Article 14, Volume 89, Issue 3, September 2011, Pages 993-1003 PDF (336.44 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2011.176690 | ||
| Author | ||
| WAFAA A. EL–AWADY | ||
| Wheat Research Department, Field Crops Research Institute, Agricultural Research Center, Giza, Egypt. | ||
| Abstract | ||
| This investigation was carried out at Etay El- Barod research station. Five populations (P1, P2, F1, F2 and F3) for three cross namely Sakha 93 x Line32, Giza 168 x Line 42 and Sakha 93 x Giza 168 were used in this investigation to study the genetic behavior of yield and its components. Significant positive heterotic effects were obtained for most of the characters studied in the F1 generations. However, significant negative heterotic effects were found for all other characters except for no.of spikes/plant in the first and third crosses, and no.of spikes/plant ,and grain yield/plant, in the second cross. Inbreeding depression estimates were found for kernels weight in the first cross, no.of kernels/spikes and kernels weight in the second cross, no.of spike/plant and grain yield/plant in the third one. The (additive, and additive x dominance )gene effects were significant for number of spikes/plant, number of kernels/spike and grain yield/plant in the second cross. Dominance gene effect (h) was significantly positive for number of kernels/spike and grain yield/plant in the three crosses. Significance of these components indicated that, both additive and dominance gene effects are important in the inheritance of these characters. In addition, dominance and epistasis were found to be significant for most of the studied attributes. Moreover, high to medium values of heritability estimates were associated with high and moderate expected and actual gain in most studied characters. These obtained results prove that selection for the studied characters could be used in the early generations but would be more effective if postponed to late ones. | ||
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