Figure 1.
Population development and phenotypic screening strategy used to develop a blast-tolerant BC2F3-derived mapping population for mapping QTLs for high grain yield under drought stress and non-stress conditions.
Table 1.
Details of experiments conducted for identification of QTLs and screening of drought-tolerant lines identified from the mapping population at IRRI and in IRRI-SA.
Figure 2.
Physical map of markers showing segregation distortion, known genes for disease resistance in rice, and QTLs reported for blast resistance in the Moroberekan/CO39 population.
M = markers showing distortion in favour of Moroberekan, S = markers showing distortion in favour of Swarna, N = genes coding for NBS-LRR proteins, and T = QTLs reported for blast resistance in the Moroberekan/CO39 population.
Table 2.
Means ± SED (M), broad-sense heritability (H) and P values for grain yield, days to flowering, and plant height and percentage yield reduction (YR) of trial mean grain yield under stress and non-stress conditions.
Table 3.
Genetic correlation between grain yield (GY), days to flowering (DTF), and plant height (PH) under lowland drought stress and non-stress conditions.
Figure 3.
Heat maps showing the effect of DTF and PH on yield performance of lines under (A) lowland severe stress (LSS), (B) lowland moderate stress (LMS), (C) lowland non-stress (LNS I) and (D) LNS II conditions.
Increasing intensity of colors from yellow to orange indicates increasing yield levels while white color shows the unavailable PH class.
Figure 4.
Circular genome plot showing the positions of QTLs identified for grain yield (adjusted for flowering time) under drought stress and non-stress conditions.
LSS = lowland severe stress, LNS = lowland non-stress, LCS = lowland combined stress, LCNS = lowland combined non-stress, UMS = upland moderate stress.
Table 4.
QTLs for grain yield adjusted for flowering time (GY), plant height (PH), and flowering time (DTF) identified under severe and/or moderate reproductive-stage drought stress and non-stress conditions in DS2011 and DS2012.
Table 5.
Epistatic QTLs affecting grain yield (kg ha-1) adjusted for flowering time under drought stress and non-stress conditions in DS2011 and DS2012.
Figure 5.
Correlation of GY performance of selected lines under drought stress and non-stress conditions in IRRI and IRRI-SA.
Figure 6.
Comparison of gene content of qDTY3.2 and qDTY11.1 based on percentage of genes belonging to seven gene classes within the two QTLs.