Correlations and path analysis studies on yield and its components in F2 generation of vegetable Indian bean (Lablab purpureus L.) sweet

Abstract

The present research work was carried out at Navsari Agricultural University, Navsari during the rabi-2017 to study correlations among quantitative traits and their direct and indirect effect on pod yield per plant in F2 populations (N1-05-19 x N1-13-465, N1-13-465 x N1-08-203 and N1-05-19 x N1-08-225) of Indian bean. Correlation analysis revealed that, pod yield per plant showed positive and significant correlation with plant height at first picking, branches per plant at first picking, pods per plant, pods per cluster and average pod weight in all the three crosses. This indicated the simultaneous improvement of these characters by selection is possible. Path coefficient analysis revealed that plant height at first picking, pods per plant, average pod weight and fibre content had direct positive effects on pod yield per plant for all the crosses. This indicated that these characters played an important role in expressing high pod yield. Pod length exhibited direct positive effects on pod yield in crosses NI-05-19×NI-13-465 and NI-05-19×NI-08-225 while, shelling ratio and protein content depicted positive direct effect on pod yield per plant in crosses NI-05-19×NI-13-465 and NI-13-465×NI-08-203, indicating that direct selection for these characters may bring about an overall improvement in the pod yield of Indian bean.