<正> From 1986 to 1993, a set of near-isogenic japonica rice lines with three major genes Xa-3, Xa-4, and Xa-12 for resistance to bacterial blight(Xanthomonas o
The seedlings of indica hybrid rice Weiyou 49 and Weiyou 28 were exposed to 1℃ and 40℃ .and the changes of activity (content) of superoxide dismutase (SOD), c