2021
DOI: 10.3390/plants10020225
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Incorporating Drought and Submergence Tolerance QTL in Rice (Oryza sativa L.)—The Effects under Reproductive Stage Drought and Vegetative Stage Submergence Stresses

Abstract: Drought and submergence have been the major constraint in rice production. The present study was conducted to develop high-yielding rice lines with tolerance to drought and submergence by introgressing Sub1 into a rice line with drought yield QTL (qDTY; QTL = quantitative trait loci) viz. qDTY3.1 and qDTY12.1 using marker-assisted breeding. We report here the effect of different combinations of Sub1 and qDTY on morpho-physiological, agronomical traits and yield under reproductive stage drought stress (RS) and … Show more

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Cited by 14 publications
(4 citation statements)
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“…This implies the possibility of selecting most drought-tolerant lines for their further use by farmers or by the breeding program. Comparable results were reported by Mohd Ikmal et al [ 23 ] in BC1 F4 lines. Spikelet fertility and yield components were significantly reduced by drought stress.…”
Section: Discussionsupporting
confidence: 87%
“…This implies the possibility of selecting most drought-tolerant lines for their further use by farmers or by the breeding program. Comparable results were reported by Mohd Ikmal et al [ 23 ] in BC1 F4 lines. Spikelet fertility and yield components were significantly reduced by drought stress.…”
Section: Discussionsupporting
confidence: 87%
“…A MABC approach was used to obtain drought and submergence-tolerant indica rice lines in the background of the elite variety UKM5, which harbor the drought yield QTLs (qDTY3.1 and qDTY12.1), using IR64-Sub1 as the donor of the submergence tolerance locus Sub1. The best-performing combination was that with Sub1 and qDTY3.1, which was characterized by higher grain yield under drought in the reproductive stage, demonstrating a positive effect of the Sub1 locus on drought tolerance when it was combined with the drought yield QTLs [103]. A similar approach was adopted to increase water-stress tolerance in Improved White Ponni (IWB), a rice variety popular in South India, which is characterized by high yield, fine grain, and high cooking quality, but it is susceptible to drought, salinity, and submergence [104].…”
Section: Contribution Of Germplasm Biodiversity To Improve Rice Respo...mentioning
confidence: 99%
“…Drought tolerant NI (near isogenic) lines, introgressed with two drought tolerant QTLs ( qDTY2.1 and qDTY3.1) , specific to reproductive stage, were developed in the high yielding elite cultivar, Pusa 44, through marker assisted backcross breeding [ 17 ]. In South East Asia, many abiotic stress tolerant varieties have been released for commercial cultivation, following marker-assisted pyramiding of QTLs for drought/salinity/submergence tolerance [ 18 , 19 ]. Several QTLs have been identified for drought tolerance at vegetative stage and reproductive stage for different drought component traits including a few yield under drought QTLs.…”
Section: Introductionmentioning
confidence: 99%