Combining ability and heterosis studies in mungbean (Vigna radiataL.Wilczek).
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Date
2015
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Rajendra Agricultural University, Pusa (Samastipur)
Abstract
The present investigation was undertaken to obtain information on combining ability and heterotic response for yield and some important quantitative traits. The experiments were carried out at Breeder Seed Production Unit Farm, Directorate of Seed and Farms, Tirhut College of Agriculture, Dholi, Muzaffarpur, Bihar during 2014-15. Eight lines and four testers were crosses in Line x Tester mating design during Kharif 2014. Total 32 crosses along with 12 parents and one standard check i.e. HUM-16 were evaluated in RBD with three replications during Kharif 2014. The observations were made for 11 yield and yield attributing traits viz., days to 50% flowering, plant height, number of clusters per plant, number of pods per cluster, pod length, seeds per pod, number of root-nodules per plant, 100 seed weight, biological yield per plant, harvest index and seed yield per plant based on the five randomly selected plants of each treatment. The crosses namely HUM-12 x TMV-37, HUM-6 x SML-668, IPM-02-14 x SAMRAT, HUM-6 x TMB-37, IPM-02-3 x PUSA VISHAL, IPM-02-3 x SAMRAT, MEHA x SML-668, NDM-09-18 x PUSA VISHAL, PDM-11 x SAMRAT, PUSA-9531 x SML-668 for days to 50% flowering; HUM-12 x TMB-37, IPM-02-3 x PUSA VISHAL, NDM-09-18 x TMB-37 for number of cluster per plant; HUM-12 x TMB-37, PM-125 x PUSA VISHAL, MEHA x PUSA VISHAL, NDM-09-18 x SML-668, PUSA-9531 x SAMRAT for number of pods per cluster; NDM-09-18 x TMB-37, PUSA-9531 x PUSA VISHAL for Pod length; HUM-12 x SML-668, IPM-02-3 x TMB-37, PDM-11 x PUSA VISHAL, PUSA-9531 x SAMRAT, PUSA-9531 x SML-668 for seeds per pod; HUM-6 x SML-668, PDM-11 x PUSA VISHAL, PDM-11 x SAMRAT, PUSA - 9531 x SML-668 for number of root-nodules per plant; HUM-12 x SML-668, HUM-12 x TMB-37, HUM-6 x TMB-37 for 100-Seeds weight; HUM-12 x TMB-37, HUM-6 x SML-668, IPM-02-14 x SAMRAT, IPM-02-3 x PUSA VISHAL, MEHA x PUSA VISHAL, NDM-09-18 x PUSA VISHAL, PDM-11 x SML-668, PUSA-9531 x SAMRAT for biological yield per plant; HUM-12 x TMB-37, HUM-6 x SML-668, MEHA x PUSA VISHAL, PDM-11 x TMB-37 for harvest index and HUM-12 x TMB-37, HUM-6 x SML-668, IPM-02-14 x SAMRAT, IPM-02-14 x SML-668, IPM-02-3 x PUSA VISHAL, IPM-02-3 x SAMRAT, MEHA x PUSA VISHAL, NDM-09-18 x PUSA VISHAL, NDM-09-18 x TMB-37 for Seed yield per plant was found superior over check HUM-16.
Based on positive and significant GCA effects along with high per se performance NDM-09-18, SML-668, HUM-12, HUM-6 and IPM-02-14 were identified as a best general combiner for yield. These parental lines may be used in hybridization programme to have the superior cross combinations for yieid.
Based on per se performance, SCA and standard heterosis among all crosses, only one cross namely HUM-12 x TMB-37 was found common for seven yield and yield attributing traits except number of root-nodules per plant, seeds per pod, pod length and plant height and other cross namely HUM-6 x SML-668 also found common for five traits Viz. days to 50% flowering, number of root nodules per plant, biological yield per plant, harvest index and seed yield per plant. These two crosses may be exploited in Mungbean improvement programme to enhance the yield.
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