期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Analysis of the Nationally Registered Rice Varieties in the Last Decade
1
作者 张现伟 李经勇 +4 位作者 官治文 姚雄 肖人鹏 刘强明 唐永群 《Agricultural Science & Technology》 CAS 2017年第3期487-489,共3页
The nationally registered rice varieties during 2006-2015 were analyzed and there were 49.4 varieties on average annually registered in the last decade. In terms of the structure of varieties, there was a decreasing t... The nationally registered rice varieties during 2006-2015 were analyzed and there were 49.4 varieties on average annually registered in the last decade. In terms of the structure of varieties, there was a decreasing trend for the proportion of three-line hybrid rice varieties but a rapid increase for that of two-line hybrid rice varieties. The percentage of rice varieties developed by scientific research institu- tions was decreasing but that developed by seed companies kept a rapid increase, indicating the commercial breeding conducted by seed companies has become a principal model in rice breeding. With regard to grain quality of varieties, the con- ventional rice varieties showed an increasing trend while the hybrid rice varieties had a decreasing trend in the proportion of high quality varieties, indicating hybrid rice needs improving more in grain quality in breeding programs. 展开更多
关键词 Rice nationauy registered Variety Breeding body Varietal type High-quality rate
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部