A QTL for high grain yield under lowland drought in the background of popular rice variety Sabitri from Nepal

From QTL to variety-harnessing the benefits of QTLs for drought, flood and salt tolerance in mega rice varieties of India through a multi-institutional network

“…This QTL is suitable for lowland drought conditions and was identified from a cross between tolerant parent Aday sel and susceptible IR64 [52]. qDTY 2.2 is reported to have effect on drought tolerance index, canopy temperature, osmotic adjustment and leaf water content [48].…”

“…This large-effect QTL shows high positive effect on grain yield under severe upland and lowland drought stress and explained 23.4% of the phenotypic variance for grain yield under severe lowland drought[48]. This QTL is reported to be in the close vicinity of HD9 locus controlling heading date in rice, which is associated with earliness under non-stress conditions but here the focus is entirely on the introgression of the QTL regardless of the flowering duration.…”

Mapping Consistent Rice (Oryza sativa L.) Yield QTLs under Drought Stress in Target Rainfed Environments

“…Direct selection for yield under stress in managed stress environments (MSEs) (Venuprasad et al 2007) and target environments (TEs) (Kumar et al 2008; Yadaw et al 2013) is considered a promising approach to improve drought tolerance in rice. However, direct selection for yield under drought in TEs is difficult because of differences in the timing and severity of drought over seasons.…”

Development of Drought Resistance in Rice

“…MAS selected lines showed a greater root mass and higher yield in drought stress. Steele et al, 2006 used There are several QTLs governing grain yield under drought conditions has been identified (Bernier et al, 2007;Kumar et al, 2007;Vikram et al, 2011;Ghimire et al, 2012;Venuprasad et al, 2012;Mishra et al, 2013;Yadaw et al, 2013;. The development of drought tolerance varieties could be made more efficient through the introgression of drought yield QTLs through marker assisted breeding.…”

“…Yield losses ranging from 15 to 50% has been reported (Srividhya et al, 2011). Chronic dry spells even for a short period affects the crop and it becomes more severe when flowering period coincides with the drought period (Boonjung and Fukai, 1996;Saini and Westgate, 2000;Pantuwan et al, 2002;Lanceras et al, 2004;Venuprasad et al, 2008;Sellamuthu et al, 2011;He and Serraj, 2012;Yadaw et al, 2013;Ha et al, 2016).…”