Study of Drought Tolerance in Recombinant Inbred Lines (RILS) Derived from the Cross of Bpt-5204/ Sahbhagi Dhan
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2017, Vol 7, Issue 4
Abstract
Drought is referred to as low-moisture stress, or is a form of abiotic stress, which is a challenge, posed by the environment to the survival and productivity of a crop that occupies a large area. The development of drought tolerant rice varieties is considered a feasible option to counteract drought stress. However, the breeding efforts to develop varieties with improved productivity are being hindered, due to lack of understanding of inheritance of drought tolerance and poor understanding of physiological basis of yield under water stress. The aim of the present study was to select drought tolerant genotypes from the F6 population of a cross between BPT-5204 (drought susceptible) and SahbhagiDhan (drought tolerant) in lowland ecology by the use of morphological markers and MAS (Marker Assisted Selection), with SSRs available in the public domain. Screening of Eight Hundred and Ten Recombinant Inbred Lines (RILs) for drought was carried out under rainout condition. Molecular studies revealed the presence of maximum of 4 QTLs for drought in a single genotype. However, the drought QTLs detected was on chromosomes 1, 3, 4, 5, 6 and 7. These QTLs were linked to various characters like plant height, panicle length, grain yield, root thickness, root length, root volume, root to shoot ratio, days to 50% flowering, biomass, harvest index and test weight.
Authors and Affiliations
Sonali Kar, D. N. Singh, Krishna Prasad, Anita Pande, Z. A. Haider
Keywords
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