Grey comprehensive evaluation and screening of new hybrid late japonica rice varieties
Cultivation screening was conducted on 30 hybrid late-maturing japonica rice varieties,and a comprehensive evaluation of 8 traits was carried out using grey comprehensive evaluation method.The results showed that 10 varieties,including Yongyou 1540 and Yongyou 12,had G values greater than 0.65,indicating excellent quality;11 varieties,including Yongyou 69 and Yongyou 15,had G values ranging from 0.60 to 0.65,indicating good quality;and 9 varieties,including Yongyou 7826 and Yongyou 1516,had G values less than 0.60,indicating inferior quality.Based on this,it is proposed that 10 varieties with excellent overall traits,such as Yongyou 1540,Yongyou 12,and Yongyou 7850,can be used for production in Jiaxing,northern Zhejiang.