Gene action for grain yield, its components and quality traits in Basmati rice (Oryza sativa L.)
2010
Anil Kumar | Mani, S.C.
The components of genetic variance for grain yield, important yield components and certain quality traits were studied in seven crosses among eight basmati parental lines. The character means over six generations were subjected to scaling test. In the presence of epistasis, six parameter model was used to detect epistasis. The genetic analysis revealed the importance of additive components (d) for plant height, number of grains / panicle, panicle length, 1000-grain weight and kenel elongation ratio; dominance (h) and epistatic components for grain yield / plant, 1000-grain weight, panicle length, number of grains / panicle in most of the crosses. Dominance effect was important for kernel L / B ratio. Among the digenic interactions additive × additive (i) and dominance × dominance (l) effects contributed more for most of the characters. Additive × dominance (j) gene effect was important for 1000-grain weight in the cross C1, C3, C4 and C7; for grain yield per plant in C5 and C7 and for plant height, number of grains per panicle, number of effective tillers per plant, panicle length in C3 and C5.In general, the crosses revealed duplicate type non- allelic interactions for grain yield/plant. All the crosses exhibited heterosis in F1and inbreeding depression in F2 generation.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Indian Council of Agricultural Research