【摘要】 为了开拓抗虫基因源,培育抗性稳定的水稻抗虫品种,采用感虫的栽培稻雄性不育株为母本,以高抗褐稻虱的野生稻为父本进行有性杂交。通过用改良的苗期群体筛选法,对其后代进行抗性鉴定,证实其抗性可以遗传,已成功地获得了抗褐稻虱的杂种后代。并根据飞虱在抗虫植株上的生存率、群体建立、蜜露量和稻株的受害级别等指标与感虫对照种TN1上的差异显著性作比较,综合评定杂种后代对褐稻虱的抗性机制。结果表明,测试的N482（A）/101392组合的F₅、F₆、F₇和H₄等几个后代对褐稻虱的抗性机制均为抗生性。更多还原

【Abstract】 Sexual hybridization was conducted between the male sterile plants of a culti-ted rice variety susceptible to brown planthopper (BPH) Nilaparvata lugens Stal as the female parent and a wild rice highly resistant to BPH as the male parent. Identifications of their progenies for the resistance to BPH were carried out by applying an improved seedling population screening method , the results indicated that the resistance is heritable , and a numble of filial generations resistant to BPH were obtained. Based on the significances of differences between the filial generations and TNI, the susceptible check variety, of a series of resistance indices such as the survival, population establishment, honey-dew amount and damaged levels of rice, etc. , the resistance mechanism of these filial generations to BPH were synthetically evaluated. It was confirmed that all the resistance mechanisms of F5, F6, F7 and H4 from the cross combination N482(A)/101392 are antibiotic.更多还原