浙江省近期育成的杂交稻新组合的主要性状分析

通过对浙江省近期育成的杂交稻新组合的主要性状考查，多数组合具有穗大、粒重、产量高和抗病能力强的特性；在穗重、抗病性及稻米品质等性状上均有不同程度的改进。今后必须在保证足够有效穗数的基础上，使每穗颖花数和结实率得到协调发展；并通过丰富遗传基础来进一步改进稻米品质。

Analysis on Major Characters of the Hybrid Rice Combinations Newly Developed in Zhejiang Province in Recent Years

The major characters of the new hybrid rice combinations developed in Zhejiang Province in recent years were surveyed. The results showed that most of the combinations had a high grain yield with big panicles and heavy grains and a strong disease resistance. Compared with the check hybrids, the newly developed hybrids had been improved to some extent in such characters as panicle weight, disease resistance and grain quality. However, the attention should be paid to the coordination of the number of spikelets per panicle and seed setting rate on the basis of sufficient productive panicles, and to the further improvement of grain quality through enrichment of genetic basis, in the future breeding programs.