| Titles |
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English :
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USING BIPLOT TECHNIQUE IN WHEAT BREEDING UNDER DIFFERENT ENVIRONMENTAL STRESSES
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Arabic :
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استخدام طريقة المحاور الثنائية في تربية القمح تحت ظروف اجهادات بيئية مختلفة
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| Abstract |
Biplot technique was used in this study to investigate the genetic behavior and to identify suitable wheat genotypes to be grown under drought and heat stresses. Three field experiments were conducted at the Experimental Farm Kom-ombo Agric. Res. Sta. during two successive seasons 2004/2005 and 2005/2006 , to evaluate, correlation and multiple traits selection under different stresses. The average yield of improved cultivars was significantly better than the average of landraces under near optimum as well as drought and heat stress conditions. Wheat genotypes differently responded to different environmental conditions. The results indicated that drought and heat stress reduced number of days to heading, number of days to physiological maturity, grain filling period, plant height, grain filling rate, number of spikes/m2 , number of kernels / spike , 1000-kernel weight , and grain yield in t/ha, by an average of (7.14% and 13.98%), (5.44% and 14.97%), (2.68% and 16.48%),(5.17% and 10.48%), (13.82% and 13.66%), (10.55% and 19.95%), (9.17% and 22.50%), (9.06% and 22.06%) and (16.23% and 27.75%), respectively, compared with the recommended normal planting date and normal irrigation at the depletion of 50% of the available soil moisture.
The biplot visual analysis indicated that the tested cultivars and three landraces (Lr7, Lr11 and Lr14) were inside one sector had cultivar V21 (Sids 1) as its vertex and all tested environment markers in the two seasons and over seasons proving that they were the best productive genotypes in all tested environments. The pattern of genotype x environment interaction in biplot graphs clearly identified tolerant genotypes to heat stress and water stress conditions.
Two genotype by trait (GT) biplots including 9 and 11 characters explained 76.26% and 68.47% of the total variation of their standardized data, respectively. These GT biplots were enough to graphically illustrate correlations between and among yield, yield components, susceptibility indices to heat and water stress and some agronomic characters. The results indicated that drought and heat stress tolerance were closely correlated. Using GT biplot as a tool for multi-traits selection proved its usefulness for this object.
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| Publication year |
2006
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| Pages |
167-200
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| Availability location |
9 شارع الجامعة- الجيزة
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| Availability number |
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| Organization Name |
Field Crops Research Institute (FCRI)
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| serial title |
المجلة المصرية لتربية النبات
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| Author(s) from ARC |
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| Agris Categories |
Agriculture - General aspects
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AGROVOC
TERMS |
Breeding methods.
Wheats.
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| Publication Type |
Journal
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