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Genetical studieson yield and some agronomic characters in aome bread wheat (Tnticum aestivum, L.) crosses
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Abstract: Parents (Pi&P2), F1, F2 Bc1 and Bc2 of three bread wheat (Triticum aestivum, L.) crosses IRENA/PBW343, IRENA/GEMMEIZA 9 and Gemmeiza 9/SIDS 7 were grown during the three successive seasons, 2003/2004, 2004/2005 and 2005/2006 at the experimental farm of EI-Gemmeiza Agric. Res. Station, ARC, Egypt. The non-allelic interaction, scaling tests (A,B,C and D) coupled with six types of gene action were estimated in addition to determining the adequacy of genetic model controlling the genetic system of the inheritance of some economic traits. Heading date, maturity date, plant height, number of spikes/plant, number of kernels/spike, 100 kernel weight and grain yield/plant were studied.
Analysis of variance indicated significant differences among the studied generations for all studied traits. Results indicated the presence of non-allelic interaction for the significant values in all traits and crosses except few casses in which the values did not reach the significant levels. In the six parameters model, the additive component (a) as well as dominance component (d) were significant in most casses. Additive x additive (aa) was significant in all casses except heading date and number of spikes/plant in the second cross (IRENA/GEMMEIZA 9) and number of spikes/plant and grain yield/plant in the third cross. Additive x dominance (ad) component was insignificant in the second cross (IRENA/GEMMEIZA 9) and third cross (GEMMEIZA 9/SIDS7) for number of spikes/plant and 100 kernel weight. Also, dominance x dominance (dd) was significant for all traits in all crosses except number of spikes/plant for second cross.
Significant positive or negative heterosis values based on better parents values were obtained for all crosses and traits except in case of maturity date for the second cross. All crosses showed significant inbreeding depression except heading date in the first cross (IRENA/PBW 343). High heritability estimates in broad sense were observed for all studied traits for all crosses. Narrow sense heritability ranged from 13.89% to 66.34% for heading date in first and third cross, respectively. High genetic advance was associated with high heritability estimates for 100 kernel weight and grain yield/plant. Moderate to low genetic advance were detected for other traits in the three crosses.
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| Publication year |
2006
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| Pages |
4949-4962
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| Availability location |
FCRIuser(معهد بحوث المحاصيل الحقلية) -9 ش الجامعة جيزة -مركز البحوث الزراعية
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| Availability number |
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| Organization Name |
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| City |
القاهرة
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| serial title |
مجلة جامعة المنصورة للعلوم الزراعية
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| Department |
Wheat Research
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| Author(s) from ARC |
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| Agris Categories |
Plant propagation
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AGROVOC
TERMS |
Genetic engineering.
Hybridization.
Triticum.
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| Publication Type |
Journal
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