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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。
Laodelphax striatellus is one of the most important rice pests in our country. Phenotypic variation may affect the spouse selectivity and population characteristics of Laodelphax striatellus. In this study, life-table construction method was used to study the population parameters of fecundity and intrinsic rate of growth of Laodelphax striatellus and then to 1 red-eye female, 1 red-eye male and 1 homozygous male (♀rr × ♂ rr♂BB) or 1 red-eye, 1 red-eye and 1 black-eye female (♀rr♀BB × ♂rr) pairing patterns and red-eye adult population mating patterns The impact of competitiveness. The results showed that the mortality of Laodelphax striatellus in addition to the nymphs (17.1%) was significantly higher than that of the normal individuals (10.3%) (P <0.05). Other biological indexes such as fecundity, egg hatching period, nymph developmental stage, Life expectancy, intrinsic rate of increase with no significant difference between normal individuals. However, the red-eye mutant has some influence on the selectivity of the SBPH. ♀ rr × ♂ rr ♂ BB and ♀ rr ♀ BB × ♂ rr combination F1 red-eye and black eye separation ratio chi-square test values of 18.15 and 14.99, greater than the theoretical value. When the red-eye and black-eye individuals were paired in 2: 8 ratio, the male red-eye spermhopper had mating advantage, and the number of red-eye individuals was larger than the expected value. These results lay the foundation for the further study on the red-eye mutant mechanism of Laodelphax striatellus and the genetic differentiation of Laodelphax striatellus using red-eye gene markers.