30个旱稻品种的主要农艺性状与相关分析

利用SAS等软件对30个旱稻品种的千粒重、株高、单株有效穗数等10个主要农艺性状进行了遗传力、遗传进度、相关系数等参数的分析，特别是进行了性状间的通径分析。结果表明：单株粒数、千粒重、结实率对旱稻单株产量的提高是至关重要的，而穗长、主茎杆粗、单株有效穗数对单株产量作用不大，甚至会出现负相关作用。因此认为，通过对单株粒数、千粒重、结实率的选择，有助于旱稻的培育，加强灌浆期的管理可以有效提高单株产量。

Correlation Analysis of the Main Agronomic Characters Among 30 Upland Rice Varieties

The genetic parameters of heritability, genetic advance, correlation coefficient of the 10 main agronomic characters such as 1 000 grain weight, plant height, effective panicles per plant of 30 varieties upland rice were analysed by using the SAS software, and the path analysis was especially carried out among the agronomic traits. The result indicated that grain weight per plant, 1 000 grain weight and seed set ratio of upland rice were important in improving yield per plant. However, the factors of panicle length, main stem size and effective panicles per plant were not important to the yield per plant and even gave negative impact to the yield per plant. Therefore, it was considered that grain weight per plant, 1 000 grain weight and seed set ratio were important factors in culturing upland rice and that improved management in the grain-filling period increased the rice yield per plant effectively.