| 摘要: |
| 【目的】明确不同翅型麦长管蚜Sitobion avenae (Fabricius)的卵巢发育和繁殖潜能，为蚜虫翅型分化多态性发生的繁殖适合度差异研究提供理论依据。【方法】在成像观察的基础上，比较小麦田麦长管蚜孤雌胎生无翅蚜和有翅蚜个体的卵巢小管数、胚胎数量、最大胚胎体积以及繁殖和寿命差异，分析不同翅型的总产仔量与其卵巢发育的关系。【结果】所有来自小麦田的不同翅型麦长管蚜成蚜均有2个卵巢，每个卵巢均包含5条卵巢小管；无翅型个体的胚胎总量和成熟胚胎数量以及最大胚胎体积分别为56.10±1.02，7.77±0.25和(0.092±0.002) mm3，显著大于有翅型个体（44.80±0.52，3.33±0.26和(0.047±0.002) mm3）。无翅型麦长管蚜的总产仔量是44.63±1.10，显著多于有翅型（26.07±1.01），而无翅型产仔前期为(0.15±0.06) d，显著短于有翅型（(1.27±0.10) d）。成蚜寿命和产仔期在不同翅型之间均无显著差异。【结论】麦长管蚜翅型分化多态性发生的繁殖适合度可能与其卵巢发育程度相关。 |
| 关键词: 麦长管蚜 繁殖潜能 卵巢发育 |
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| 基金项目:国家自然科学基金项目（31101433）；中央高校基本科研业务费项目（2014YB09） |
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| Fitness differences of ovarian development and reproduction between wingless and winged morphs of Sitobion avenae (Fabricius) (Homoptera:Aphididae) |
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Lü Nannan,SHI Qi,WU Junxiang,et al
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| Abstract: |
| 【Objective】Ovarian development and reproduction potential were determined between winged and wingless morphs of Sitobion avenae (Fabricius) to provide basis for future reproductive fitness differences of wing polyphenism in aphids.【Method】The numbers of ovarioles and embryos,volume of basal embryos,fecundity,and longevity were evaluated between both morphs of S.avenae under wheat field conditions,based on the comparison of morphological characteristics of ovary in wing dimorphic aphid.【Result】Both wingless and winged aphids had two ovaries per female and an ovary had five ovarioles.The number of total,number of mature embryos,and average volume of basal embryos in ovarioles for the wingless morphs were 56.10±1.02,7.77±0.25,and （0.092±0.002） mm3,which were significant highly than those for the winged morphs (44.80±0.52,3.33±0.26,and （0.047±0.002） mm3).The total fecundity of wingless morphs (44.63±1.10) was significantly greater than that of wingless morphs (26.07±1.01),while pre reproductive period （(0.15±0.06） d) was significantly shorter than that of wingless morphs （(1.27±0.10） d).However,no significant differences were observed in longevity and reproductive period between two morphs.【Conclusion】The fitness differences of reproduction of wing polyphenism might be related to the degree of ovarian development in S.avenae. |
| Key words: Sitobion avenae reproduction potential ovarian development |
