Analysis of Approved Rice Varieties and Their Trend in Liaoning Province
In order to understand the change trend of rice varieties approved in Liaoning Province,the varieties,breeding sub-jects,yield,quality and blast resistance of 213 rice varieties approved in 2011～2020 were analyzed.The results showed that conventional japonica rice was the main approved rice variety,accounting for 92.0%.The annual approved number of enterprises and research institutes showed a rising trend.Since 2015,the yield of 55 varieties has exceeded 10000 kg/hm2.The number of approved high-quality rice varieties accounted for 84.98%,the number of approved high-quality rice varieties showed a rising trend,the annual proportion showed a descending trend.The annual average value of chalkiness and alkali digestion value showed a rising trend and fluctuated in the range of 2 and 3 grades respectively.Quality breeding should pay attention to reduce chalkiness and increase alkali digestion value.From 2011 to 2020,the blast resistance of approved varieties increased from 70.0%to 96.2%,showing an upward trend,but the number of highly resistant varieties was still small.This paper analyzed the trend of approved varieties in Liaoning province,and provided strong scientific basis and guiding value for breed selection.
国家科技期刊平台
NSTL
万方数据
