| Titles |
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English :
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Inheritance of yield and its attributes in five canola (brassica napusl.) crosses using six parameters model
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Arabic :
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وراثة المحصول والصفات المتعلقة به في خمس هجن من الكانولا
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| Abstract |
This study was carried out during three successive seasons 2000,2001 and 2002 at the Shandaweel Agriculture Experimental Research Station. Six parameters model for five canola crosses were used to study inheritance system, type of gene action, heterosis, heritability and expected genetic advance for yield and its attributes. Scaling test ( A, B and C) provides evidence for the failure of a simple genetic model to explain the genetic mechanism controlling yield and its attributes in crosses except cross no. 1 ( Serw 4*Serw 6) for days to 50% flowering, cross no. 2 ( Serw 4*Pactol) for fruiting zone and cross no. 4 ( Serw 6*Dippe) for number of siliqua/plant . Both additive and dominance gene action and their interactions (additive x additive, additive x dominance and dominance x dominance) were significant with great importance of dominance for inheritance studied traits in most crosses. Moreover, additive x additive comes in second order after dominance in most crosses for plant height, fruiting zone, number of racemes/plant, number of siliqua/plant, 1000-seed weight and seed yield/plant.
In cases of adequency of a simple additive dominance model, the dominance genetic variance (H) had the major part of total genetic variance (cross no. 1), resulting in ۏ√H/D >1 for days to 50% flowering. While additive variance (D) was greater in magnitude than corresponding dominance, resulting in√ H/D <1 for fruiting zone (cross no. 2) and number of siliqua/plant (cross no. 5 (Pactol x spring rape )). The "F" values indicated that the increasing alleles were more frequent in most crosses for studied traits.
Negative and significant heterosis effect was found for flowering in three crosses over mid and better parent. Otherwise, positive and significant heterosis was recorded for other traits in most crosses. Narrow sense heritability recorded 54.73, 77.77 and 36.66% for days to 50%flowering (cross no. 1), fruiting zone (cross no. 2)and number of siliqua/plant (cross no. 5), resulting in expected genetic advance of 5.2, 26.08 and 13.39% respectively.
Key Word: six parameters model, canola, yield
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| Publication year |
2004
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| Availability location |
معهد بحوث المحاصيل الحقلية - مركز البحوث الزراعية - ش الجامعه - 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 أسيوط للعلوم الزراعية
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| Department |
Oil Crops Research
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| Author(s) from ARC |
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| External authors (outside ARC) |
عاطف أبو الوفا أحمد
قسم المحاصيل - كلية الزراعة - جامعة أسيوط
عبد الحاكم يونس علام
قسم المحاصيل - كلية الزراعة - جامعة أسيوط
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| Agris Categories |
Plant genetics and breeding
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AGROVOC
TERMS |
Genetic inheritance.
Population genetics.
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| Publication Type |
Journal
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