关键词: 水稻, 越冬性, 海拔, 农艺性状, 遗传变异

Abstract: Abstract It was analyzed that overwintered character of axillary buds of glutinous rice 89-1 in different altitudes, heritabilities on overwintered character of glutinous rice 89-1 in four different hybrid combination, heritabilities and variation of main agricultural trait in F2 populations of Glutinou89-1/MingHui63 in three different seasons.The results showed that glutinous rice 89-1 could overwinter by axillary buds in low temperature .Grain yields of main and overwintered ratoon season were very close. Heritabilities on overwintered character of glutinou89-1were very diversity in different hybrid combinations. Glutinou89-1/HongMangNuo and Glutinou89-1/FuHui838 were high. Glutinou89-1/MingHui63 and Glutinou89-1/Ce64 were low .Heritabilities of plant height and 1000-grain weights were relatively high,and highest in main crop ,but lowest in overwintered ratoon crop. Heritabilities of grains/panicle and seed set rate were highest in ratoon crop.Averages of Grains/panicle,1000-grain weights,plant height and panicle length in F2 populations of glutinou89-1/MingHui63 were close to F1.They all were nearly normal distribution. Genetic selection did not exist from F1 to F2 progeny.Amount range and coefficient of variation of seed set rate were most in main and overwintered ratoon crop,least in ratoon crop.But average seed set rate of ratoon crop was more . All average seed set rate of three crop were higher with F1 . Seed set rate was bimodal distribution .Genetic selection did exist from F1 to F2 progeny. Selection consequence always was propitious to high seed set rate.

Key words: Rice, Overwintering character of axillary buds, Altitude, Agricultural trait, Heredity and Variation