GENETIC VARIABILITY STUDIES IN F4 AND F5 SEGREGATING GENERATIONS OF SELECTED CROSSES FOR LATE LEAF SPOT DISEASE RESISTANCE, POD YIELD AND ITS COMPONENT TRAITS IN GROUNDNUT (Arachis hypogaea L.)
| dc.contributor.advisor | SAVITHRAMMA, D.L. | |
| dc.contributor.author | JYOTHI RANJANA, T.P. | |
| dc.date.accessioned | 2021-09-22T09:06:14Z | |
| dc.date.available | 2021-09-22T09:06:14Z | |
| dc.date.issued | 2018-08-01 | |
| dc.description.abstract | Genetic variability for disease resistance is very important for efficient crop improvement in groundnut. An investigation was carried to understand genetic variability of segregating generations for Late Leaf Spot (LLS) disease resistance, pod yield and its component traits. The experimental material of F4 and F5 segregating generations comprised resistant and susceptible parental combinations of crosses GPBD 4 × TMV 2, GPBD 4 × ICGV 99005, ICGVC 13099 × ICGV 86590, GKVK 17 × ICGV 86590, NRCG 12568 × ICGV 91114. Analysis of results revealed moderate GCV, PCV, moderate to high heritability and GAM for pods plant-1, pod yield plant-1, kernel yield plant-1, shelling percentage, SMK per cent in F4 and F5 generations for all five crosses. This indicates presence of additive gene action and selection could be appropriate. High GCV, PCV with moderate to high heritability and GAM was observed for per cent disease index at 75, 90 and115 days after sowing. Hence selection for LLS disease resistance could be carried out for these traits in all five crosses of F5 generation. Estimation of narrow sense heritability using parent offspring regression was carried out. Results revealed moderate narrow sense heritability for pod yield attributing traits and LLS disease resistance indicated additive gene action with high selection efficiency for these traits. Based on the results obtained in F5 generation superior performing progenies for LLS disease resistance coupled with high pod yield were selected in all five crosses of groundnut. | en_US |
| dc.identifier.other | Th-12019 | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810176065 | |
| dc.keywords | Leaf Spot, shelling percentage | en_US |
| dc.language.iso | English | en_US |
| dc.pages | 136 | en_US |
| dc.publisher | University of Agricultural Sciences, Bangalore | en_US |
| dc.sub | Genetics and Plant Breeding | en_US |
| dc.theme | LATE LEAF SPOT DISEASE RESISTANCE | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | GENETIC VARIABILITY STUDIES IN F4 AND F5 SEGREGATING GENERATIONS OF SELECTED CROSSES FOR LATE LEAF SPOT DISEASE RESISTANCE, POD YIELD AND ITS COMPONENT TRAITS IN GROUNDNUT (Arachis hypogaea L.) | en_US |
| dc.type | Thesis | en_US |