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English :
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Studies of correlation and both coefficient analysis for some yield attributes in some bread wheat genotypes under two environments
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Arabic :
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دراسة الارتباط وتحليل معامل المرور لبعض مكونات المحصول في بعض التراكيب الوراثية لقمح الخبز تحت بيئتين مختلفتين
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| Abstract |
This study was conducted at Res. farm of Shandaweel Agric. Res. station, wjric. Res. Cen. (ARC) Egypt, during the period of 2001/2002 - 2003/2004 seasons, to estimates of phenotypic, genotypic correlations and path coefficient analysis in five bread wheat genotypes, F1 hybrids and three F2 populations under two treatments of irrigation (normal and drought stress).
The results showed that grain yield/plant had positive and significant correlations with each of number of spikes/plant, 100 kernel weight, plant height and days to maturity under the two treatments of irrigation in the parents and F1 hybrids for both magnitudes of correlations. Meanwhile, in the F2 populations grain yield/plant showed varied values of correlations from positive and significant to insignificant in both phenotypic and genotypic correlations according to cross with previous traits. Similarly, phenotypic and genotypic correlations between grain yield/plant and each f number of kernels/spike and days to heading were negative in the parents only under normal irrigation, while the relationships of these traits was positive in the F1 hybrids under the two treatments of irrigation.
Also, the results revealed that number of spikes / plant had positive and significant correlation with each of 100 kernel weight and days to maturity in the parents under the two irrigation treatments and positive insignificant correlations with each of plant height and days to heading in all studied genotypes under the irrigation treatments, while it showed negative and significant correlations with number of kernels/spike in the parents and in the F2 populations of crosses No 2 (p2 x p3) and No. 3 (p4 x p5).
The phenotypic and genotypic correlations were positive and significant between number of kernels / spike and each of kernel weight and number of days to heading in the parents under normal irrigation and in the Fi hybrids with kernel weight and plant height. Meanwhile, in the F1 generations the relationships differed from positive to negative correlations according to population.
Also, the relationships between 100 kernel weight and each of plant height, days to heading and days to maturity varied from positive to negative significant or insignificant according to genotypes and irrigation treatments. Plant height revealed positive correlations with days to heading in the parents and Fi hybrids under the two irrigation treatments and cross No 1 (Pi x P2) in the F2 generation under drought stress only.
Days to heading showed negative correlations with days to maturity in the parents and in the F1 hybrids under normal irrigation, while had positive and significant Drrelations under drought stress with all studied generations.
Path coefficient analysis under normal irrigation showed that grain yield was directly affected by number of kernels/spike in all studied generations and number of Dikes/plant in the (Fi hybrids and cross No3 in F2 population). Meanwhile, under drought stress , grain yield was affected directly by number of spikes/plant in the parents and in the F2 population of cross No3, number of kernels/spike in the in the F2 populations of crosses No. 1 and 2 and 100 Kernel weight in the parents and in F2 population of cross No. 2.
These results revealed that selection for lines having high number of spikes, number of kernels/spike and heavy kernel weight will result in lines having high yielding ability
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| Publication year |
2005
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| Pages |
785-799
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| Availability location |
معهد بحوث المحاصيل الحقلية-- 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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| 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 genetics and breedingPlant physiology - Growth and developmentPlant physiology - Reproduction
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AGROVOC
TERMS |
Soft wheat.
Wheat flour.
Wheats.
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| Publication Type |
Journal
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