一、引言由于高海拔地区的生态特殊性,在选育与之相适应的籼型杂交稻组合时,不能照搬长江中下游地区的选育模式。本文通过对18个杂交稻F_1;8个数量性状进行通径分析研究,以期从构成产量的众多因素中,找出起决定作用的主要因素,从而为制定高海拔地区的籼型杂交稻育种目标提供理论依据。 I. INTRODUCTION Due to the ecological specialties of high altitude areas, the selection of corresponding indica hybrid rice can not copy the breeding pattern in the middle and lower reaches of the Yangtze River. In this paper, the path analysis of F_1; 8 quantitative traits in 18 hybrid rice was conducted in order to find out the main factors that play a decisive role in the production of many varieties of rice, so as to make the goal of breeding indica hybrid rice at high altitude Provide a theoretical basis.