Mapping consistent additive and epistatic QTLs for plant production traits under drought in target populations of environment using locally adapted landrace in rice (<i>Oryza sativa</i> L.)

A total of 36 colocated QTLs associated with plant production traits were mapped using IR62266/Norungan recombinant inbred lines under drought and non-stress conditions in target populations environment. Multi-model composite interval mapping multi-environment analysis detected seven consistent for on chromosomes 1, 2, 3, 6, 10 11. height, number tillers, biomass, spikelet fertility grain yield identified chr. 1 (RM5389-RM11943-RM5794), 2 (RM324-RM5390 RM12460-RM423-RM5345), 3 (RM6329-RM5475-RM16030), 6 (RM508-RM585-RM217), (RM7361-RM8207) 11 (RM209-RM6499) this study have been reported as meta-QTLs drought. Consistent positive allelic contribution from the landrace, Norungan was shown at two while IR62266 showed effect QTL 10. At other four regions confounded stress condition, instance region straw additive all trials, trials allele came IR62266. Epistasis non-additive effects its relative small. Relatively small percentage variation explained by x environment interaction (0.28 - 1.77%), but larger than that across environments (0.05 0.35%). These may genes evolutionarily conserved response to could be ideal candidates rice improvement water-limited environments.