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Genetical Studies on Physiological and Morphological and their Relation with Wheat Yield
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Abstract: A half dialed cross among five common wheat varieties and lines were evaluated in both F1 and F2 generation Were used to estimate general and specific combining abilities and correlation between grain yield / plant each of flag leaf area (FLA), leaf angle (LA), leaf area Index (LAI), specific leaf weight (SLW), relative growth rate(RGR), Chlorophyll ( A, B and carotenes), and some yield components in F1 and grain yield and yield components in F2 (LAI), (SLW) , and chlorophyll were measured at two periods ( 10 and 15 weeks after planting ). Significant mean squares for genotype of parents , crosses, and parents vs. crosses were detected in both generations except parents for (SLW) at the 1st period and parents for (SLW) at the 1st period and parents vs. crosses for *LA), (LAI) at the 1st period and (SLW) at the 2nd period in F1 generation . The parents P2 and P5 were the top of the tested parents in grain yield per plant. Correlation coefficient estimates between grain yield per plant and each of flag leaf area (FLA), leaf angle (LA) specific leaf weight (SLW) at the 1st and 2nd periods, (RGR), number of spikes / plant and 1000-kernelweight in F1, and number of spikes / plant, number of kernels / spike and 1000-kernel weight in F2 were positive and significant .
The mean squares associated with general specific combing ability were significant for all characters in both generations. High GCA/SCA ratio which exceeded than unity were detected for ( FLA), ( LA) and ( SLW) in F1 generation and most the studied characters in F2 generation. The parental line ( P1) had the best combiner for leaf angle ( LA) and low ( LAI), ( SLW) at the 2nd period, (RGR), chlorophyll at the 1st and 2nd periods and number of spikes per plant. Also, the variety ( P5) was the best combiner for ( FLA), ( LAI) at the 1st period, ( SLW) at the 1st period, chlorophylls at the 1st and 2nd periods, number of kernels per spik, 1000-kernel weight and grain yield per plant .
The five crosses (1×2), ( 1×5 ), ( 2×5), (3×4) and ( 4×5) gave significantly positive ( Sij) for grain yield / plant as well as most studied characters for F1 generation. The six crosses (1×2), ( 1×4 ), ( 1×4), ( 2×3), ( 2×5), and (3×4) gave significantly positive ( Sij) for grain yield / plant as well as most studied characters for F2 generation. Generally, the results obtained from F2 data were nearly similar to those obtained from F1 data .
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| Publication year |
2007
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| Pages |
194-206
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| Availability location |
معهد بحوث المحاصيل الحقلية- 9شارع الجامعة- الجيزة
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| Availability number |
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| Organization Name |
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| serial title |
Alexandria Sci. Exchange J.
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| Author(s) from ARC |
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| Agris Categories |
Agricultural research
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AGROVOC
TERMS |
Wheats.
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| Publication Type |
Journal
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