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褐飞虱Nilaparvata lugens(Stl)是杂交水稻的重要虫害,培育高抗褐飞虱的杂交水稻新组合被认为是目前防治飞虱最有效、经济的方法。本研究以分子标记辅助选择培育的抗褐飞虱杂交水稻为材料,通过苗期和成株期的全生育期田间抗性鉴定,对基因聚合改良杂交稻组合的褐飞虱抗性进行综合评价,结果表明,基因聚合改良杂交稻组合的苗期抗性介于抗和中抗水平,田间虫量在7次调查中均低于800头/百丛,远低于2000头/百丛的防治标准,而对照扬两优6号、两优培九和当地农家品种两优63在8月29日到9月10日飞虱发生高峰期的百丛虫量分别最高达到5400头、2030头和10700头,高于或远高于2000头/百丛的防治标准。改良组合川香29A/华恢1462的产量在通城比对照扬两优6号增产11.8%。上述结果表明抗褐飞虱改良杂交稻新组合能够有效抑制稻田褐飞虱种群数量,节约人工和农药成本,增加水稻产量。
Nilaparvata lugens (Stl) is a major insect pest in hybrid rice. The development of a new hybrid rice combination with high resistance to BPH is considered to be the most effective and economical way to control planthoppers. In this study, molecular marker-assisted selection of resistance to brown planthopper rice as a material, through the seedling stage and adult stage of the whole growth period of field resistance evaluation, genetically modified improved hybrid rice combination of resistance to brown planthopper comprehensive evaluation results show that, The seedling stage resistance of hybrid rice improved by hybridization was lower than that of resistant and medium resistant, and the number of insects in field was less than 800 heads per hundred in seven surveys, far lower than the control standards of 2000 heads per hundred. Yangliangyou 6, Liangyoupeijiu and local peasant cultivar Liangyou63 reached the peak of 5400, 2030 and 10700 respectively at the peak of planthopper from August 29 to September 10, which were higher than or far Higher than 2000/100 plex control standards. The yield of the improved combination Chuanxiang 29A / Huahui 1462 increased by 11.8% compared with that of the control Yangliangyou 6. The above results show that the new combination of improved resistance to BPH can effectively reduce the population of BPH population, save labor and pesticide costs and increase the yield of rice.