Mapping QTL for traits related to water use efficiency, yield and yield related parameters in recombinant inbred line population of Groundnut (Arachis hypogaea L.)
| dc.contributor.advisor | Savithramma, D. L. | |
| dc.contributor.author | SAVITA, S. K. | |
| dc.date.accessioned | 2018-05-25T06:03:25Z | |
| dc.date.available | 2018-05-25T06:03:25Z | |
| dc.date.issued | 2017-08-11 | |
| dc.description.abstract | Drought is the greatest impact on yield losses in groundnut. With the objective of identifying Quantitative trait loci (QTL) controlling traits related to water use efficiency viz., SPAD chlorophyll meter reading, specific leaf area and carbon isotope discrimination in recombinant inbred line (RIL) population of the cross GKVK 4 × NRCG 12473. Linkage map analysis of the 164 loci resulted in the mapping of 105 marker loci on 22 linkage groups (LGs) and total map distance of 763.1 cM was developed. QTL analysis detected a total of four main effect QTL (M-QTL) for SCMR and two QTL for SLA with 8.64 - 11.35% phenotypic variation explained (PVE) and a total of 44 M-QTLs were obtained for pod yield and yield related parameters with PVE % up to 43.74 %. A total of 56 significant epistatic-QTL (E-QTL) interactions were detected with PVE % upto 29.70 %. M-QTL and E-QTL interaction explained a fairly large magnitude of PVE % for traits related to WUE, pod yield and its parameters. Identified linked markers/QTLs have to be validated for its potential use in marker assisted breeding for high WUE. Drought tolerance was quantified by thirteen drought tolerant indices, among them STI, MP, GMP and HMP showed significant high correlation with pod yield under well watered and water stress conditions. This aids for identification of four RILs 1076-3-2, 1647-4-8, 1034-7-3 and 1100-6-8 with high WUE and high pod yield. | en_US |
| dc.identifier.other | Th-11778 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810047511 | |
| dc.language.iso | en | en_US |
| dc.pages | 217 | en_US |
| dc.publisher | UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU | en_US |
| dc.sub | Genetics and Plant Breeding | en_US |
| dc.subject | null | en_US |
| dc.theme | Mapping QTL for traits related to water use efficiency, yield and yield related parameters in recombinant inbred | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | Mapping QTL for traits related to water use efficiency, yield and yield related parameters in recombinant inbred line population of Groundnut (Arachis hypogaea L.) | en_US |
| dc.type | Thesis | en_US |