| Titles |
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English :
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Contributions of different traits in seed yield through two cycles of pedigree line selection in sesame (Sesamum indicum L.)
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Arabic :
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مساهمة الصفات المختلفة في المحصول خلال دورتين من الانتخاب المنسب في السمسم
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| Abstract |
The genetic materials used in this study were the F2, F3, F4, and F5 generations of two populations in sesame to study the response of pedigree line selection and contributions of studied traits in seed yield and oil at Shandaweel Research Station Farm, Oil Crops Section, Agricultural Research Center, Egypt . The results could be summarized as follow : -
1 - The analysis of variance exerted highly significant differences among F3 families for studied traits, reflecting the genetic variances among obtained families of both base populations .
2 - The means after two cycles of pedigree line selection presented positive direct response of 49.12, 45.17 and 41.83; and 45.78, 31.37 and 22.30% in seed yield/plant with seed yield/plant as selection criterion over the best parent, bulk and the check Shandaweel 3 for population 1 and 2, respectively. The indirect positive response in seed yield/plant via other selection criteria out yielded less or negative values after two cycles of selection. These results reflect that the direct selection for seed yield/plant is more effective for its improvement in both studied populations.
3 - Genotypic correlation coefficients were increased after two cycles of selection compared to the base population between seed yield/plant and each of length of fruiting zone, number of capsules/plant, length of capsule and seed index with different selection criteria for one or both populations.
4 - In most cases, the combinations of two or three for the stutied traits increased their contributions (R2) in seed yield after the two cycles of selection compare to the base populations.
5 - It could be concluded that the high R2 used as strong evidence to detect the best traits combinations for indirect selection for seed yield.
6 - The oil percentage means of best 5 selections after two cycles of were 55.88 and 57.29% in population 1 and 2, respectively. These values reflected direct response of 3.55, - 0.09 and 1.05; and 5.44, 2.06 and 3.60% over the best parent, bulk and check Shandaweel 3 for population 1 and 2, respectively. Seed index has highest genotypic correlation traits with oil percentage.
Key words: Contributions, different traits, seed yield, pedigree line selection, sesame
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| Publication year |
2005
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| Pages |
125-141
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| Availability location |
معهد بحوث المحاصيل الحقلية - مركز البحوث الزراعية - 8 ش الجامعه - الجيزه
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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 أسيوط للعلوم الزراعية
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| Department |
Oil Crops Research
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| Author(s) from ARC |
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| Agris Categories |
Plant genetics and breeding
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AGROVOC
TERMS |
Genetics.
Sesamum.
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| Publication Type |
Journal
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