文献类型： 会议论文

第一作者： Chang-xiang Mao

作者： Chang-xiang Mao ¹ ; Yu-min Shi ¹ ; Shan-fu Wei ¹ ; Zhi-ping Song ¹ ; Hang Zhou ¹ ; Wei-hao Wang ¹ ; Li-ping Xie ¹ ; Bai-Long Liu ¹ ;

作者机构： 1.Rice Research Institute, Guangxi Academy of Agricultural Sciences, Nanning,Guangxi, 530007, China

会议名称： International symposium on hybrid rice

主办单位：

页码： 1-10

摘要： The use efficiency (UE) of a crop variety depends on how large its growing area is and how long it lasts in production. UE depends on how perfect rice hybrids and their parental lines are and on some nontechnical factors. This paper analyzes data and statistics of hybrid rice R & D in the past 30 years and notes that the UE of rice hybrids and parental lines has declined both inside and outside of China. This is a major constraint to the sustainable development of hybrid rice in the world. We suggest two ways to increase UE. The technical way includes breeding, a strict evaluation system for hybrids, improving cultural management, parental line purification, raising F1 seed yield, avoiding a fast rotation of hybrids, and encouraging technical innovation. The nontechnical way consists of making policy adjustments, controlling malignant competition, organizing wide cooperation, removing local protectionism, and protecting farmers’ benefits first, to increase UE for sustainable R & D of hybrid rice in China and globally.

分类号： Q781`S334