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稻飞虱是水稻生产最严重的害虫之一。野生稻拥有丰富的抗虫基因资源,导入系是鉴定和利用野生稻有利基因的有效途径。本研究通过对371份小粒野生稻导入系进行抗褐飞虱和白背飞虱接虫鉴定,分别筛选出了11份抗、72份中抗褐飞虱的材料和7份抗、45份中抗白背飞虱的材料,其中有5份材料兼抗褐飞虱和白背飞虱,这是从小粒野生稻中鉴定出抗白背飞虱材料的首次报道。通过对2份抗性导入系材料与感虫亲本杂交构建的F1和F2群体的抗虫鉴定和分析表明:K41对褐飞虱和白背飞虱的抗性受2对显性抗虫基因通过互补作用所控制;P114对褐飞虱和白背飞虱的抗性都是由1对主效的隐性基因控制。这些结果必将有利于小粒野生稻抗稻飞虱的基因定位和育种利用。
Planthopper is one of the most serious pests in rice production. Wild rice is rich in insect-resistant gene resources, and introduction lines are an effective way to identify and utilize the favorable genes of wild rice. In this study, 371 accession lines of wild rice were identified for resistance to BPH and BPH, 11 materials were screened, 72 were resistant to BPH and 7 were resistant to BPH Lice material, of which five were resistant to BPH and BPH, the first report of the identification of BPH-resistant materials from the germplasm of the small wild rice. Insecticidal identification and analysis of F1 and F2 populations constructed by crossing two resistant lines with susceptible parents showed that the resistance of K41 to BPH and BPPH was affected by two pairs of dominant insect-resistant genes The control of P114 to BPH and BPPH was controlled by a pair of major recessive genes. These results will be conducive to the genetic mapping and breeding of small-sized wild rice against planthopper.