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取分别在水稻品种TN1 (常用感虫对照 )、Mudgo(含Bph1 )或ASD7(含bph2 )上连续饲养 3 0代以上的3个褐飞虱Nilaparvatalugens寄主种群 ,分别饲养于 2 0种氨基酸总量与配比不同的全纯人工饲料上 ,以羽化率、短翅率、若虫历期以及初羽化成虫体重为指标对不同种群的氨基酸需求进行了比较。发现不同褐飞虱种群随氨基酸营养条件的改变有明显不同的表现 ,其中Mudgo种群最容易受到氨基酸营养条件的影响 ,而TN1种群所受影响最小。抗虫品种ASD7和Mudgo上的两褐飞虱种群所需的最佳氨基酸总浓度 (分别为 4 0 %～ 4 8%、4 0 % )高于TN1种群 (2 4%～ 3 2 % ) ,同时 ,前两种群对必需氨基酸浓度的变化较TN1种群敏感。这些结果表明 ,不同褐飞虱寄主种群对饲料氨基酸的需求存在明显的分化 ,推测氨基酸可能是抗虫水稻品种胁迫褐飞虱致害性变异的一种重要机制。
Three Nilaparvata lugens host populations were fed on 30 generations of rice planthopper TN1 (commonly used susceptible control), Mudgo (including Bph1) or ASD7 (including bph2), respectively, and were kept in 20 kinds of total amino acids The amino acid requirements of different populations were compared based on the indexes of emergence rate, short wing rate, nymphs duration and initial eclosion adult body weight on different holotype artificial feedstuffs. It was found that the populations of different Nilaparvata lugens (Nilaparvata lugens) were significantly different with the change of nutritional status of amino acids. Among them, Mudgo population was the most susceptible to amino acid nutrition condition, while TN1 population had the least impact. The best total amino acid concentrations (40% ~ 48%, 40%, respectively) of N. lugens populations on insect-resistant varieties ASD7 and Mudgo were higher than those of TN1 (24% ~ 32%), The first two populations were more sensitive to the TN1 population than to the essential amino acids. These results indicate that there is a clear differentiation of feedstuff amino acid needs among different host populations of N. lugens, suggesting that amino acids may be an important mechanism of the virulence of N. lugens to insect-resistant rice varieties.