Gene action in a five parent diallel cross of spring wheat (Triticum aestivum L.)
2003
Khan, A.S. | Habib, I. (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Breeding and Genetics)
In the present study graphic analysis was made for 5x5 diallel cross involving wheat varieties/lines viz., Tobari-66, SARC-1, 4943, 4072 and 4770 to determine genetic mechanism controlling some important yield components during crop season 2001-2002. Number of tillers per plant and grain weight per spike were governed by over-dominance type of gene action while plant height and peduncle length were controlled by partial dominance with additive type of gene action. Whereas, 1000-grain weight exhibited partial dominance type of gene action. Genotype Tobari-66 possessed maximum dominant genes for plant height and peduncle length and SARC-1 for number of tillers per plant. While genotype 4072 had maximum dominant genes for traits like grain weight per spike and 1000- grain weight. Epistasis was absent for all the above mentioned traits. For the traits like plant height, peduncle length and 1000- grain weight, selection in early generation will be fruitful whereas delayed selection should be preferred for the traits like number of tillers per plant and grain weight per spike.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
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