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ASSESSMENT OF GENETIC VARIATION FOR YIELD AND YIELD COMPONENTS IN MUNGBEAN (VIGNA RADIATA (L.) WILCZEK) USING GENERATION MEAN ANALYSIS

G. S. S. KHATTAK, M. ASHRAF* AND M. S. KHAN

Abstract: The genetic variation for yield and some important yield components was assessed in two sets of crosses involving four parents through generation mean analysis. The mean data of six populations (both parents, F₁, BC₁, BC₂ and F₂) were subjected to joint scaling test. In the presence of epistasis, six-parameter model was used to detect all types of gene actions. Both the crosses had shown complex genetic behaviour for all the traits examined, except branches per plant in cross 6601 x NM 92 and pod cluster per plant in cross ML-5 x NM 54. The additive (d) and dominant (h) components of genetic variation were significant for all the traits in both the crosses, but dominant (h) component was non-significant for branches per plant and 1000 seed weight in cross ML-5 x NM 54, and for pod bearing nodes on main stem in cross 6601 x NM 92. The duplicate type of non-allelic interactions were found for pod cluster per plant and 1000 seed weight in cross 6601 x NM 92, and for 1000 seed weight in cross ML-5 x NM 54. The complementary type of non-allelic interaction for seed yield per plant was found in both crosses. The intercrossing of F2 plants are recommended to produce best recombinants for the traits having complex genetic behaviour and selection in the latter generations of segregating populations for developing high yielding mungbean genotypes.
 

Nuclear Institute for Food and Agriculture (NIFA), Peshawar, NWFP, Pakistan.
* Department of Botany, University of Agriculture, Faisalabad, Pakistan