摘要
对 198 1— 2 0 0 0年 2 0a来湖南省晚稻品种 (含杂交稻组合 ,下同 )的演变进行了分析。湖南省晚稻品种的演变呈现出如下特点 :杂交稻占主导地位 ,且比例不断扩大 ;威优系统和汕优系统构成杂交稻主体 ;常规稻主栽品种逐步实现优质化 ;品种数目不断增多 ,单个品种播种面积减少 ;超过 68%的品种年播种面积低于 670 0hm2 。对产生这些现象的原因进行了探讨。
The development of late season rice varieties or hybrid combinations in Hunan Province in 20 years (1981-2000) was analyzed. It was found that the development had the distinguishing features of hybrid rice occupying dominant and ever increasing position, the hybrids derived from V20A and Zhenshan 97A being the main body of hybrid rice, conventional rice varieties being gradually replaced by good quality ones, the number of varieties increasing with plant area of a single variety decreasing, over 68% of varieties being grown under less than 6 700 hm 2 every year. These phenomena were also analyzed on their forming reasons and the further development of late season rice breeding was discussed in the paper.
出处
《杂交水稻》
CSCD
北大核心
2003年第1期1-4,共4页
Hybrid Rice
关键词
湖南
晚稻
品种演变
特点
Late season rice
variety development
breeding
Hunan
