Since the end of 1940s, China has ever taken breeding and popularization of elite varieties as the important measures for yield increase of rice. About 1,000 va
<正> From 1977 to 1987, new rice varieties Xiangkang 32xuan 5, Xiangzaoxian 3 and HA79317—4 were bred. They had resistance to bacterial blight (BB), rice blast
Background: Tree species represent 20% of the vascular plant species worldwide and they play a crucial role in the global functioning of the biosphere. The Medi