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比较了我国南宁、越南河内、河静、顺化、胡志明市、九龙江6个褐飞虱地理种群的差异.结果表明:南宁、河内、河静、顺化的褐飞虱种群能致害含Bph1和bph2抗虫基因的水稻品种,而越南胡志明市、九龙江褐飞虱种群的致害能力更强,对含Bph1、bph2、Bph3、bph4抗虫基因的水稻品种均表现为致害或强致害;南宁、河内、河静、顺化褐飞虱若虫在水稻品种TN1、Mudgo、ASD7上的存活率均在52%以上,在Rathu Heenati、Babawee、Ptb33上的存活率均低于44%;胡志明市、九龙江褐飞虱若虫除了在Rathu Heenati上的存活率低于50%外,在其他品种上的存活率都在50%以上.南宁、河内、顺化褐飞虱若虫在TN1、Mudgo、ASD7上的发育历期显著短于在Rathu Heenati、Babawee、Ptb33上的发育历期;河静褐飞虱若虫在TN1、Mudgo、ASD7上的发育历期与在Rathu Heenati、Ptb33上的发育历期差异不显著.胡志明市褐飞虱若虫在TN1、ASD7上的发育历期显著短于在Rathu Heenati、Babawee、Ptb33上的发育历期;九龙江褐飞虱若虫在TN1、Mudgo、ASD7、Rathu Heenati、Babawee、Ptb33上的发育历期差异不显著.选择性试验表明,接虫192h后,南宁、河内褐飞虱若虫在Rathu Heenati、Babawee、Ptb33上的虫口密度显著低于在TN1、Mudgo和ASD7上的虫口密度;河静褐飞虱若虫在Babawee上的虫口密度显著低于在TN1、Mudgo上的虫口密度;顺化、胡志明市褐飞虱若虫在Babawee上的虫口密度显著低于在TN1、Mudgo、ASD7、Rathu Heenati上的虫口密度;九龙江褐飞虱若虫在Babawee、Ptb33上的虫口密度显著低于在TN1、ASD7上的虫口密度.本研究发现,我国南宁褐飞虱田间种群与越南河内、顺化、河静(属于越南中部及北部地区)的褐飞虱田间种群致害性相似,从而为“越南中北部是褐飞虱迁入我国的虫源地”提供了新的证据.
The differences of the geographical populations of the Nilaparvata lugens in Nanning of China, Hanoi, Hejing, Hue, Ho Chi Minh City and Jiulongjiang of China were compared.The results showed that the populations of Nilaparvata lugens (BPN) in Nanning, Hanoi, Insect resistance genes. However, the population of N. lugens in Ho Chi Minh City and Jiulongjiang of Vietnam was more virulent, and all the rice cultivars with Bph1, bph2, Bph3 and bph4 genes had the highest virulence or virulence. Nanning , The survival rates of HNP, HN, HNNN on rice varieties TN1, Mudgo and ASD7 were all over 52%, and the survival rates on Rathu Heenati, Babawee and Ptb33 were both less than 44%; Ho Chi Minh City, Kowloon The survival rate of BPH nymphs was above 50%, except for the survival rate on Rathu Heenati, and the developmental duration of nylotrophic nylori in TN1, Mudgo and ASD7 in Nanning, Hanoi and Hue Was shorter than that on Rathu Heenati, Babawee and Ptb33, and no significant difference was observed between the developmental duration of N. nymphenica nymphs on TN1, Mudgo and ASD7 and the developmental duration on Rathu Heenati and Ptb33. TN1, A. The developmental duration of SD7 was significantly shorter than that on Rathu Heenati, Babawee and Ptb33, and the developmental duration of N. lugens nymphs in TN1, Mudgo, ASD7, Rathu Heenati, Babawee and Ptb33 was not significant. The results showed that the population density of Nilaparvata lugens n n nilaparvata nilotica on Rathu Heenati, Babawee and Ptb33 in Nanning and Hanoi was significantly lower than that on TN1, Mudgo and ASD7 after 192 h, and the population density of N. nymphenica on Babawee was significant The population density of the brown planthopper nymphs on Babawee in Hohming was significantly lower than that on TN1, Mudgo, ASD7 and Rathu Heenati in Hue, but the population density of the brown planthopper nymphs in Babawee, Ptb33 Were significantly lower than those in TN1 and ASD7.The field population of BPH in Nanning, China was similar to those in the field populations of HNH in Hanoi, Hue, Huanjing (belonging to central and northern Vietnam) , Thus providing new evidence for “the central and northern part of Vietnam is a source of BPH migration to our country.”