“740098”是我国74年从国际水稻研究所引进的品系之一(原名:IR2061—464—2—4—5),在湖南省作晚稻栽培,丰产性较好。特别是在大田种植中,当邻近丘的其他品种遭到褐飞虱的严重为害,甚至全部死秆倒伏时,“740098”却保持不受害。在整个晚稻生长期,它完全不需要防治褐飞虱。所以,这个品种在湖南农村深受欢迎,推广面积逐年增大。为了明确“740098”抗褐飞虱的机制,我们在1977-1978年进行了初步研究。 “740098” is one of the strains introduced from the International Rice Research Institute (formerly IR2061-464-2-4-5) in China for 74 years. It is cultivated in late rice in Hunan Province and has good yield. Especially in the field planting, “740098” remains unharmed when other varieties of neighboring mound were severely damaged by brown planthopper, and even all the stalks lodged. Throughout the late rice growing season, it does not need to control the brown planthopper. Therefore, this variety is very popular in rural Hunan, the promotion area increases year by year. In order to clarify the mechanism of “740098” against BPH, we conducted a preliminary study in 1977-1978.