关键词: 高原粳稻, 收获指数, 高产育种

Abstract: The study chose eight representative varieties of plateau japonica rice and conducted randomized block design to compare the differences in harvest index, yield as well as other main characteristics and analyze their correlations. The results showed that the harvest index of different varieties ranged from 0.499 to 0.545, and there were significant differences in different varieties. The harvest index was positively correlated with yield, 1 000 grain weight, seed setting rate, effective panicles, maximum tiller number and panicle length, but not significant; it was significantly negatively correlated with the plant height, negatively correlated with the total grains per panicle, filled grains per panicle, grain density, but the correlation was not significant. So as to carry out the study of super high yield breeding for plateau japonica rice.

Key words: plateau japonica rice, harvest index, high yield breeding