Summary
Gene effects, and interactions, and associations between days-to-flower initiation and maturity, number of secondary branches and siliquae per plant, and 1,000-seed weight and yield per plant were studied in a cross of Indian mustard (Brassica juncea (L.) Czern & Coss) using the parents and F1, F2, F3, B1, B2, B11, B12, B21, B22, B1S, B2S, B1F1, B2F1, B1bip, B2bip, F2P1, F2F1, and F2bip generations. A linked digenic model was adequate for all characters studied. According to this model, the main effects, additive and interactions between linked pairs of genes, were present in varying proportions for days-to-flower initiation and maturity and number of siliquae per plant. The contribution of linked epistatic effects, however, was much greater than that of additive effects. Dominance effects contributed significantly to the inheritance of days-to-flower initiation. Duplicate epistasis was observed for all traits except 1,000-seed weight where epistasis was of the complementary type. A complete association among the genes of similar effect (increasing or decreasing) was observed for number of secondary branches and siliquae, and yield per plant. Coupling phase linkage was observed for days-to-flower initiation whereas repulsion phase linkage was observed for daysto-maturity and 1,000-seed weight.
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References
Anand IJ, Rawat OD (1978) Combining ability studies on Indian mustard (Brassica juncea Coss). Z Pflanzenzücht 81:241–247
Badwal SS, Singh M, Labana KS, Chaurasia BD (1976) General versus specific combining ability in raya (Brassica jtuncea L. Czern & Coss). J Res, Punjab Agric Univ 13:319–323
Cavalli LL (1952) An analysis of linkage. In: Reeve ECR, Weddington CH (eds) Quantitative inheritance. HMSO, London, pp 135–144
Chaudhary SK, Sharma SK (1982) Notes on the inheritance of some quantitative characters in a cross of Indian mustard. Indian J Agric Sci 52:23–25
Chauhan YS, Singh D (1979) Genetic architecture of some quantitative characters in Indian mustard. Indian J Genet 39:255–262
Comstock RE, Robinson HF, Harvey PH (1949) A breeding procedure designed to make maximum use of both general and specific combining ability. Agron J 41:360–361
Govil SK, Chaubey CN, Chauhan YS (1981) Combining ability studies in Indian mustard. Indian J Agric Sci 51:623–626
Jensen NF (1970) A diallel selective mating system for cereal breeding. Crop Sci 10:629–635
Jinks JL, Jones RM (1958) Estimation of the components of heterosis. Genetics 43:223–234
Jinks JL, Perkins JM (1969) The detection of linked epistatic genes for a metric trait. Heredity 24:465–475
Kashi Ram, Ram Krishna, Chauhan YS, Katiyar RP (1976) Partial diallel analysis in F3 generation of Indian mustard. Indian J Agric Sci 46:229–232
Labana KS, Tirath Ram, Badwal SS, Mehan DK (1978) Combining ability analysis in the Indian mustard. Crop Improv 5:37–44
Rehman S, Joardar OI, Eunus AM (1977) Diallel analysis of some quantitative characters of Brassica juncea L. Genet Agrar 31:1–2
Singh AB, Chauhan YS, Singh P (1981) Genetics of yield in Indian mustard. Indian J Genet 41:130–136
Singh D, Singh D, Verma RS (1970) Heritability and degree of dominance in Indian mustard (Brassica juncea L. Czern Coss). Indian J Agric Sci 40:283–287
Yadava AK, Yadava TP, Prakash Kumar (1979) Combining ability studies by line x tester analysis in Indian mustard. Crop Improv 6:141–147
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Communicated by A. R. Hallauer
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Sachan, J.N., Singh, B. Linked epistasis for six quantitative traits in Indian mustard (Brassica juncea (L.) Czern & Coss). Theoret. Appl. Genetics 71, 644–647 (1986). https://doi.org/10.1007/BF00264269
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DOI: https://doi.org/10.1007/BF00264269