tailieunhanh - Association study of morphological and physiological traits with yield in groundnut genotypes under terminal drought condition

Groundnut (2n=4x=40) is an important oilseed crop. India has high both in area and production of groundnut, but low in productivity. The low productivity due to many constraints among them important one is drought, in that terminal drought is a most damaging one. Development of drought tolerant varieties is only a cost-effective method to mitigate the drought effect on agriculture. But, the studies under terminal drought conditions in association with yield and some surrogate/physiological traits were limited. Hence, keeping these in view, present correlation study was conducted by considering 12 morphological and five surrogate traits in 144 groundnut genotypes. The dry pod yield had a positive significant correlation with the number of mature pods, kernel yield at both phenotypic (, ) and genotypic (, ) level under end season drought. Harvest Index (%) had a strong significant positive correlation with dry pod yield in terminal drought condition at both genotypic () and phenotypic level (). the rest of surrogate traits like relative water content, canopy temperature, specific leaf area, and SPAD chlorophyll meter reading had the non significant association with dry pod yield under end season drought expect at RWC and SCMR at 80 days after sowing. | Association study of morphological and physiological traits with yield in groundnut genotypes under terminal drought condition