草地贪夜蛾的择偶与生殖力研究  

Study of mate selection and fecundity of Spodoptera frugiperda(Lepidoptera:Noctuidae)

作　　者：吴婷 张秋朗 赵庆义 徐进 叶辉[3] WU Ting;ZHANG Qiu-Lang;ZHAO Qing-Yi;XU Jin;YE Hui(Yunnan Academy of Biodiversity,Southwest Forestry University,Kunming 650224,China;Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China,Ministry of Education,Southwest Forestry University,Kunming 650224,China;School of Ecology and Environment,Yunnan University,Kunming 650091,China)

机构地区：[1]西南林业大学云南生物多样性研究院,昆明650224 [2]西南林业大学,西南山地森林资源保育与利用教育部重点实验室,昆明650224 [3]云南大学生态与环境学院,昆明650091

出　　处：《昆虫学报》2023年第4期564-574,共11页Acta Entomologica Sinica

基　　金：云南省重点领域科技计划项目(202001BB050002);云南省农业基础研究重点项目(202201AS070025)。

摘　　要：【目的】探究草地贪夜蛾Spodoptera frugiperda主要择偶策略及其与生殖力的关系,并基于性选择理论探讨其择偶策略的进化意义和机制。【方法】将经过标记的不同日龄、不同体重及不同交配经历的草地贪夜蛾雌雄成虫进行配对,然后对配偶选择进行观察并对交配成功的雌雄成虫形态特征(体长、触角长度、翅长、胸部及腹部长度和宽度)及生殖力(单雌产卵量、卵孵化率和孵化出的幼虫数)进行比较分析。【结果】草地贪夜蛾雌雄成虫均偏好与年轻、体重较重及未交配过的成虫进行交配。雌成虫选择年轻(3日龄)雄成虫进行交配的概率(65.45%)显著高于选择年老(7日龄)雄成虫进行交配的概率(34.55%),雄成虫选择3日龄雌成虫进行交配的概率(82.35%)显著高于选择7日龄雌成虫进行交配的概率(17.65%)。雌成虫选择体重较大雄成虫进行交配的概率(74.58%)显著高于选择体重较轻雄成虫进行交配的概率(25.42%),雄成虫选择体重较重雌成虫进行交配的概率(66.67%)显著高于选择体重较轻雌成虫进行交配的概率(33.33%)。雌成虫选择无交配经历雄成虫进行交配的概率(64.91%)显著高于选择有交配经历雄成虫进行交配的概率(35.09%),雄成虫选择无交配经历雌成虫进行交配的概率(78.57%)显著高于选择有交配经历雌成虫进行交配的概率(21.43%)。获得交配权的雄成虫的体长、触角长度以及翅长均显著大于未获得交配权的雄成虫的,获得交配权的雌成虫的体长、翅长以及腹部长度和宽度均显著大于未获得交配权的雌成虫的。生殖力研究表明,雌成虫选择与没有交配经历的雄成虫交配(相对于选择有交配经历的雄成虫交配)可以获得更高的单雌产卵量(未交配vs已交配:1024粒vs 917粒)及卵孵化率(未交配vs已交配:91.36%vs 89.10%)。相比于选择年老和体重较轻的雌成虫交配时,雄成虫选择年轻和体重较重的雌�【Aim】To explore the main mate selection strategies and their relationship with the fecundity in the fall armyworm,Spodoptera frugiperda,and to explore the evolutionary significance and mechanism of mate selection strategies based on the theory of sexual selection.【Methods】Marked female and male adults of S.frugiperda with different day-old ages,body weight and mating experiences were paired,and their mate selections were observed,the morphological characteristics(body length,antennal length,wing length,and thoracic and abdominal length and width)and fecundity(number of eggs laid per female,egg hatching rate and number of hatched larvae)of mated and unmated female and male adults were measured and compared.【Results】Both female and male adults of S.frugiperda preferred to mate with young,heavy and unmated adults.The probability of female adults selecting young(3-day-old)male adults to mate(65.45%)was significantly higher than that selecting old(7-day-old)male adults to mate(34.55%),and the probability of male adults selecting 3-day-old female adults to mate(82.35%)was significantly higher than that selecting 7-day-old female adults to mate(17.65%).The probability of female adults selecting heavy male adults to mate(74.58%)was significantly higher than that selecting light males to mate(25.42%),and the probability of male adults selecting heavy female adults to mate(66.67%)was significantly higher than that selecting light females to mate(33.33%).The probability of female adults selecting male adults without mating experience to mate(64.91%)was significantly higher than that selecting males with mating experience to mate(35.09%),and the probability of male adults selecting female adults without mating experience to mate(78.57%)was significantly higher than that selecting females with mating experience to mate(21.43%).The body length,antennal length and wing length of male adults who obtained mating rights were significantly greater than those of males who did not obtain mating rights,while the body lengt

关 键 词：草地贪夜蛾 配偶选择 生殖力 性选择 害虫防治 

分 类 号：Q968[生物学—昆虫学]