During 2009-2010, salt tolerance(ST) of 49 introgression line populations derived from Minghui 86 were evaluated according to performance of STrelated traits including percentage of survival plants, seed setting rate and grain weight per plant under 0.5% salinization (sea water+fresh water) over the whole growth stage. The results indicated that the populations differed in ST even derived from the same subspecies, indica or japonica. The introgression populations originated from japonica parents showed better ST than those originated from indica parents. The four populations with Shennong 265, Y134, Zaoxian 14 and Gayabyeo as donor parents had high percentage of salttolerant lines, 10.04%, 6.98%, 11.83% and 7.9%, respectively. High reproducibility of the results in the two years conformed the high reliability. The hybrids between the restorer lines with ST and Xieqingzao A were evaluated for heterosis under conventional cultivation. Six elite combinations with better performance in panicle number per plant, spikelet number per panicle, 1000grain weight and grain yield per plant were selected from the progenies of Xieqingzao A/salttolerant restore lines under conventional cultivation. Field salt stress over whole growth stage creat favorable conditions for breeding of hybrid rice with ST and high yield potential.
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