TY - JOUR AU - Vikram, Prashant AU - Swamy, BP Mallikarjuna AU - Dixit, Shalabh AU - Ahmed, Helal Uddin AU - Teresa Sta Cruz, Ma AU - Singh, Alok Kumar AU - Kumar, Arvind PY - 2011 DA - 2011/10/18 TI - qDTY1.1, a major QTL for rice grain yield under reproductive-stage drought stress with a consistent effect in multiple elite genetic backgrounds JO - BMC Genetics SP - 89 VL - 12 IS - 1 AB - Drought is one of the most important abiotic stresses causing drastic reductions in yield in rainfed rice environments. The suitability of grain yield (GY) under drought as a selection criterion has been reported in the past few years. Most of the quantitative trait loci (QTLs) for GY under drought in rice reported so far has been in the background of low-yielding susceptible varieties. Such QTLs have not shown a similar effect in multiple high- yielding drought-susceptible varieties, thus limiting their use in marker-assisted selection. Genetic control of GY under reproductive-stage drought stress (RS) in elite genetic backgrounds was studied in three F3:4 mapping populations derived from crosses of N22, a drought-tolerant aus cultivar, with Swarna, IR64, and MTU1010, three high-yielding popular mega-varieties, with the aim to identify QTLs for GY under RS that show a consistent effect in multiple elite genetic backgrounds. Three populations were phenotyped under RS in the dry seasons (DS) of 2009 and 2010 at IRRI. For genotyping, whole-genome scans for N22/MTU1010 and bulked segregant analysis for N22/Swarna and N22/IR64 were employed using SSR markers. SN - 1471-2156 UR - https://doi.org/10.1186/1471-2156-12-89 DO - 10.1186/1471-2156-12-89 ID - Vikram2011 ER -