Thumbnail Image

University of Agricultural Sciences, Bengaluru

University of Agricultural Sciences Bangalore, a premier institution of agricultural education and research in the country, began as a small agricultural research farm in 1899 on 30 acres of land donated by Her Excellency Maharani Kempa Nanjammanni Vani Vilasa Sannidhiyavaru, the Regent of Mysore and appointed Dr. Lehmann, German Scientist to initiate research on soil crop response with a Laboratory in the Directorate of Agriculture. Later under the initiative of the Dewan of Mysore Sir M. Vishweshwaraiah, the Mysore Agriculture Residential School was established in 1913 at Hebbal which offered Licentiate in Agriculture and later offered a diploma programme in agriculture during 1920. The School was upgraded to Agriculture Collegein 1946 which offered four year degree programs in Agriculture. The Government of Mysore headed by Sri. S. Nijalingappa, the then Chief Minister, established the University of Agricultural Sciences on the pattern of Land Grant College system of USA and the University of Agricultural Sciences Act No. 22 was passed in Legislative Assembly in 1963. Dr. Zakir Hussain, the Vice President of India inaugurated the University on 21st August 1964.

Browse

20221
Reset filters
Subject: Genetics and Plant Breeding × Author: BHARATH KUMAR P. JAMBAGI × End date: 2023 × Start date: 2020 × Type: Thesis × Thesis Type: Ph.D ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    IDENTIFICATION AND VALIDATION OF QTL CONTROLLING TRAITS RELATED TO DROUGHT TOLERANCE IN THE RECOMBINANT INBRED POPULATION OF THE CROSS NRCG 12568 × NRCG 12326 IN GROUNDNUT (Arachis hypogaea L.)
    (University of Agricultural Sciences, Bangalore, 2022-12-28) BHARATH KUMAR P. JAMBAGI; D. L. SAVITHRAMMA
    An investigation was carried out with the experimental material consisting of 147 RILs developed from the cross NRCG-12568 × NRCG-12326 during summer 2017 and 2018 at GKVK, Bengaluru under four different conditions viz., Well-watered (WW), Water stress (WS) I -with holding irrigation from 30-45 DAS (flowering period), Water stress II -with holding irrigation from 45-65 DAS (flowering and peg initiation stage), water stress III -with holding irrigation from 65-85 DAS (peg penetration and pod development stage) in augmented design including checks; TMV-2 and GKVK-5. Significant differences among RILs were observed for most of the traits in both the conditions. SCMR, SLA, pods plant-1 and pod yield plant-1 showed more genetic variation exhibiting moderate to high heritability with high genetic advance. Four out of 15 drought tolerant indices tested viz., MP, GMP, HMP and STI were found to be better indicators of drought tolerance. RIL133, RIL126, RIL145 and RIL25 showed higher pod yield in WW and WS conditions in comparison to GKVK 5 across years and locations based on per se performance, biplot analysis and ranking method. A linkage map was developed with 172 SSR markers on 20 linkage groups using genotypic data of 147 RILs. The length of linkage map spanned 2212.87 cM with an average of 11.12 cM inter-maker distance. Twenty-one QTLs were detected with 6.27-13.55% of phenotypic variance explained (PVE) in WW and WS environments. Two major QTLs each for SCMR and days to 50 per cent flowering, three major QTLs for SLA were detected in WS condition at LOD 3.0. A total of 38 Di-QTL interactions with more than 5% PVE were identified at LOD 5.0. The QTLs identified in the study can be utilized for marker assisted back cross breeding after validation. Stable RILs can be tested in multilocations or could be used infuture breeding for drought tolerance.