Development of advanced breeding lines of rice for drought tolerance based on physiological and yield traits

The reproductive stage is the most important critical stage in rice where water is needed for the formation of seeds. Water scarcity in this situation drastically reduces yield which in turn hampers farmers' effort towards agriculture. Traditional landraces do have resistant genes inside them against several abiotic and biotic stresses which can act as valuable donors to produce new gene combinations. A high-density SNP based genetic map was constructed by Genotyping by sequencing (GBS) technique using F7 recombinant inbred line (RIL) population developed from Banglami x Ranjit to identify tightly linked markers associated with QTLs. The total map length was 1306.424 cM which had an average inter-marker distance of 0.281 cM. A total of 42 QTLs were identi ed under both reproductive stage drought stress (RS) and non stress (NS) conditions for sixteen different yield and its component traits which explained a phenotypic variance (PVE) of 1.95-13.36 %. Four QTLs explained a PVE ≥ 10% which denotes they are major QTLs. Analysis of the genes present within the QTL regions revealed the presence of 6 candidate genes which were differentially expressed under stress condition. These genes and QTLs will be helpful for marker-assisted pyramiding to improve drought tolerance in rice.

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Genetic analysis for detection of genes associated to drought tolerance in rice accessions belonging to north east India

Verma

Chetia

Sharma

et al. 2022

Mol Biol Rep

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Development of advanced breeding lines of rice for drought tolerance based on physiological and yield traits

Cited by 3 publications

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Identification and characterization of genes for drought tolerance in upland rice cultivar ‘Banglami’ of North East India

Identification and characterization of genes for drought tolerance in upland rice cultivar ‘Banglami’ of North East India

Molecular mapping of drought-responsive QTLs during the reproductive stage of rice using a GBS (genotyping-by-sequencing) based SNP linkage map

Genetic analysis for detection of genes associated to drought tolerance in rice accessions belonging to north east India

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