红眼突变灰飞虱的生物学特性和交配优势

灰飞虱Laodelphax striatellus是我国重要水稻害虫之一， 表型变异可能影响灰飞虱的配偶选择性和种群特性。本实验采用生命表构建法研究了红眼突变灰飞虱的繁殖力、 内禀增长率等种群生命参数， 然后以1红眼雌虫、 1红眼雄虫和1纯合黑眼雄虫（♀rr×♂rr♂BB）或1红眼雄虫、 1红眼雌虫和1纯合黑眼雌虫（♀rr♀BB×♂rr）配对模式以及不同比例红眼成虫群体配对模式研究红眼突变对灰飞虱交配竞争力的影响。结果表明红眼突变灰飞虱除若虫死亡率（17.1%）显著高于正常个体（10.3%） (P<0.05)外， 其他生物学指标如繁殖力、 卵孵化历期、 若虫发育历期、 成虫寿命、 内禀增长率等与正常个体无显著差异。但红眼突变对灰飞虱配偶选择性有一定的影响。♀rr×♂rr♂BB和♀rr♀BB×♂rr组合F1代红眼和黑眼分离比例卡方试验值为18.15和14.99， 大于理论值。当红眼与黑眼个体以2︰8比例配对时， 红眼灰飞虱雄虫存在交配优势， 其后代红眼个体数大于期望值。这些结果为进一步研究灰飞虱红眼突变机理和利用红眼基因标记研究灰飞虱遗传分化奠定了基础

Biological characteristics and mating advantage of the red-eye mutant of the small brown planthopper,Laodelphax striatellus (Hemiptera: Delphacidae)

Laodelphax striatellus is one of the most serious rice pests in China, and its phenotype mutations possibly affect population parameters and mating. In this study, the biological characteristics of the red-eye mutant of L. striatellus were analyzed by life table method. The results showed that the red-eye mutant had no significant effects on reproduction, egg hatching duration, nymphal period, adult longevity and the intrinsic rate of increase, but the mortality in mutant planthoppers (17.1%) was significantly higher than that in wild type planthoppers (black eye) (10.3%) (P<0.05). The amount of offsprings with red-eye was more than that of expectation in the mate choice test which consisted of one red-eye female, one red eye male and one homozygous black-eye male (♀rr×♂rr♂BB), or one red-eye male, one red-eye female and one homozygous black-eye female (♀rr♀BB×♂rr). The Chi-square values were 18.15 and 14.99, respectively, in the two cross combination, and higher than the critical value. The rare male mating advantage was found when the ratio of red-eye planthoppers was 20%. These results provide a foundation to further study the red-eye mutation mechanisms and for the use of red-eye mutation as genetic marker.