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[9004140.] رقم البحث : 9004140 - |
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Inheritance of yield and itscomponents in two bread wheat crosses under normal and water stress conditions / |
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قطاع الدراسات الزراعية / General |
| تخصص البحث : General |
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Assiut Journal of Agricultural Sciences / |
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يوسف خيرى انور ( ajas@aun.edu.eg - 01226313930 ) - مؤلف رئيسي |
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Quantitative traits, gene action, dominance, additive, epistasis |
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The present investigation was conducted at Shandaweel Agricultural Research Station – Field Crops Research Institute (FCRI), Agricultural Research Center(ARC) through threesuccessivewinter seasons from 2015/16 to 2017/18. The experimental material included six populations i.e.P1, P2, F1,F2, BC1, and BC2 for two bread wheat crosses vizShandaweel 1 × Sids 1 and Line 1 × Sids 12. Six parameters model was applied for studying inheritance of seven agronomic traits; days to heading (DH), no. of spikes/plant (S/P), plant height (PLH), biological yield / plant (BY), grain yield/plant (GY),100-grain weight (100-KW), and no. of kernels/spike (K/S) under normal irrigation (5 irrigations) and water stress conditions (3 irrigations). The results showed significant or highly significant differences among the included materials.Mean performance of F1 generation in cross 1 and cross 2 override mid-parents or/and best parent for most of the reviewed traits under investigation except plant height in cross 2 under stress conditions.The results of scaling tests indicated that at least one of thesescales is significant and additive-dominance model is inadequate, consequently six parameters model is applicable.The results indicated that gene main effect was highly significant for all the studied traits. Additive gene effect was significant for most of the traits in combinations of the crosses and environments. The results showed that non-allelic interactionswere significant or highly significant with positive sign for some traits and with negative sign for the others. The results indicated that duplicate epistasis was predominant while complementary epistasis was found onlyin one case.The average degree of dominance indicated presence of partial, complete, and over dominance. Broad, narrow sense heritability and genetic advance valueswere moderate to high.The results of the current investigation revealed that the included material can be used for producing high yielding lines under stress water conditions deploying selection in early generation for some traits andin advanced generation in the others. |
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