ESTIMATION OF GENETIC PARAMETERS FOR YIELD AND YIELD COMPONENTS AND SOME AGRONOMIC CHARACTERS IN TWO CROSSES OF BREAD WHEAT (Tritium aestivum L.) | ||
| Journal of Agricultural Chemistry and Biotechnology | ||
| Article 6, Volume 34, Issue 5, May 2009, Pages 4293-4300 PDF (617.78 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jacb.2009.93107 | ||
| Authors | ||
| A.A.M. Aboshosha1; S. M. Hammad2 | ||
| 1Dept of Genetics, Fac. Of Agric.,Kafrelsheikh Univ. | ||
| 2Wheat Research Dept., Field Crops Research Institute, ARC. Egypt | ||
| Abstract | ||
| Three cultivars of bread wheat; Sakha 69, Sakha 93 and Sakha 94 were crossed in all six generations. P1, P2, F1, F2, BC1 and BC2 were obtained for two crosses;(Sakha 69 × Sakha 93) and (Sakha 93 × Sakha 94) to determine genetic parameters for number of days to heading and maturity, plant height, number of spikes per plant, number of kernels per spike, 100-kernel weight and grain yield per plant. The experiment was conducted at Sakha Agricultural Research Station during the growing seasons 2005/06, 2006/07 and 2007/08. Data revealed the presence of highly significant differences among crosses, among populations within crosses as well as among populations within each cross for all studied characters. The calculated values of A, B and C scaling tests for all studied characters in the two crosses were significant except for plant height in the second cross. The additive effect was more important and greater than the dominance effect for 100- kernels weight and grain yield per plant for the two crosses, while the dominance effect was more important and greater than the additive effect for days to heading and maturity for the two crosses and also for number of spikes per plant in the first cross. Heritability in broad and narrow sense indicated the importance of the non-additive variance components in the inheritance of the all studied characters except 100-kernel weight in the first cross. Heritability estimates in narrow sense were low to moderate for all the studied traits in the two crosses, ranged from 22.88% for grain yield per plant in the second cross to 69.10% for 100 kernels weight in the first cross. The expected genetic advance estimates in the F2 were low for number of days to heading, number of days to maturity, number of spikes per plant and 100-kernel weight in two crosses. The same trend were found for, plant height, number of kernels per spike and grain yield per plant in the second cross. While, indicated high for plant height, number of kernels per spike and grain yield per plant in the first cross. | ||
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