IDENTIFICATION OF SUPERIOR F6 PROGENIES FOR LATE LEAF SPOT (LLS), POD YIELD AND ITS COMPONENT TRAITS IN FIVE CROSSES OF GROUNDNUT (Arachis hypogaea L.)
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Date
2023-02-24, 2023-02-24
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Publisher
University of Agricultural Sciences, Bangalore
University of Agricultural Sciences, Bangalore
University of Agricultural Sciences, Bangalore
Abstract
Groundnut (Arachis hypogaea L.) is an important oil seed crop and yield levels are significantly affected by the incidence of late leaf spot (LLS) disease. Creation and utilization of genetic variability for LLS disease resistance with yield advantage is the crucial step in groundnut crop improvement. An investigation was carried out to understand genetic variability in F5 and F6 generations of crosses viz., TMV 2 × ICGV 86699, TMV 2 × GBFDS 272, TMV 2 × ICGV 91177, GKVK 4 × ICGV 91177 and GKVK 4 × GBFDS 272 for LLS disease resistance, pod yield and its attributing traits. High GCV, PCV estimates with high heritability coupled with moderate GAM was observed for per cent disease index at 60, 75, 90 and 105 DAS. Estimation of narrow sense heritability using parent offspring regression revealed low to moderate narrow sense heritability for pod yield attributing traits and LLS disease resistance. Among the twenty superior progenies identified for high yield and resistance to LLS, many were from the cross TMV 2 × ICGV 91177, hence this cross was considered as best cross. Twenty superior progenies for LLS disease resistance and also for high pod yield from among the five crosses studied and these lines could be advanced to next generation to achieve stability
Groundnut (Arachis hypogaea L.) is an important oil seed crop and yield levels are significantly affected by the incidence of late leaf spot (LLS) disease. Creation and utilization of genetic variability for LLS disease resistance with yield advantage is the crucial step in groundnut crop improvement. An investigation was carried out to understand genetic variability in F5 and F6 generations of crosses viz., TMV 2 × ICGV 86699, TMV 2 × GBFDS 272, TMV 2 × ICGV 91177, GKVK 4 × ICGV 91177 and GKVK 4 × GBFDS 272 for LLS disease resistance, pod yield and its attributing traits. High GCV, PCV estimates with high heritability coupled with moderate GAM was observed for per cent disease index at 60, 75, 90 and 105 DAS. Estimation of narrow sense heritability using parent offspring regression revealed low to moderate narrow sense heritability for pod yield attributing traits and LLS disease resistance. Among the twenty superior progenies identified for high yield and resistance to LLS, many were from the cross TMV 2 × ICGV 91177, hence this cross was considered as best cross. Twenty superior progenies for LLS disease resistance and also for high pod yield from among the five crosses studied and these lines could be advanced to next generation to achieve stability
Groundnut (Arachis hypogaea L.) is an important oil seed crop and yield levels are significantly affected by the incidence of late leaf spot (LLS) disease. Creation and utilization of genetic variability for LLS disease resistance with yield advantage is the crucial step in groundnut crop improvement. An investigation was carried out to understand genetic variability in F5 and F6 generations of crosses viz., TMV 2 × ICGV 86699, TMV 2 × GBFDS 272, TMV 2 × ICGV 91177, GKVK 4 × ICGV 91177 and GKVK 4 × GBFDS 272 for LLS disease resistance, pod yield and its attributing traits. High GCV, PCV estimates with high heritability coupled with moderate GAM was observed for per cent disease index at 60, 75, 90 and 105 DAS. Estimation of narrow sense heritability using parent offspring regression revealed low to moderate narrow sense heritability for pod yield attributing traits and LLS disease resistance. Among the twenty superior progenies identified for high yield and resistance to LLS, many were from the cross TMV 2 × ICGV 91177, hence this cross was considered as best cross. Twenty superior progenies for LLS disease resistance and also for high pod yield from among the five crosses studied and these lines could be advanced to next generation to achieve stability