| 摘要: |
| 【目的】探讨寄主植物对麦长管蚜种群分化的作用，剖析寄主转换对其生长发育及繁殖的影响。【方法】在人工气候箱中于温度（20±1） ℃、相对湿度（65±5）%、光周期为16 h∶8 h(L∶D)的条件下，对麦长管蚜在不同寄主植物（小麦、大麦、燕麦）及转换寄主后的生活史和生命表参数进行比较。【结果】不同寄主植物上，麦长管蚜种群的若虫发育历期以及成虫寿命、存活率和繁殖力都存在很大差异。当原始寄主和替代寄主相同时，与大麦上麦长管蚜种群相比，小麦和燕麦上麦长管蚜种群若虫发育历期和成虫寿命较短，存活率、繁殖力、种群内禀增长率、净增殖率和周限增长率均较高。小麦上麦长管蚜种群转到燕麦上后，其成虫寿命和繁殖期缩短。大麦上麦长管蚜种群转接到小麦和燕麦上后，其若虫发育历期明显缩短，净增殖率明显增加。各寄主植物上麦长管蚜种群转换寄主后，其存活率和繁殖力会发生明显改变。【结论】转换寄主后，各寄主植物上麦长管蚜种群呈现一定程度的分化。 |
| 关键词: 麦长管蚜 寄主植物 生命表 种群分化 |
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| 基金项目:高等学校博士学科点专项科研基金项目（20110204120001）；长江学者和创新团队发展计划项目（IRT1035）；西北农林科技大学科研业务费资助项目（QN2011059） |
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| Life-history comparison of Sitobion avenae on different host plants |
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GAO Su-xia,HUANG Xian-liang,LIU D-guang,et al
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| Abstract: |
| 【Objective】This study aimed to determine the impacts of host plants on population differentiation of Sitobion avenae and analyzed the effects of host transfer on the development and reproduction,and life history traits of S.avenae.【Method】The life history and life table parameters of S.avenae clones on original host plants (wheat,barley and oat) and alternative host plants were compared based on the results form artificial climate chamber experiment with temperature of (20±1） ℃,RH of (65±5)% and light cycle of 16 h∶8 h(L∶D).【Result】Significant differences existed in the nymph developmental time,adult lifespan,survival rate,and fecundity of S.avenae on different host plants.With the same original host plants and alternative host plants,S.avenae on wheat and oat had shorter nymph developmental time and adult lifespan,and higher survival rate,fecundity,intrinsic population growth rate,net reproductive rate,and finite increase rate than that on barley.Adult lifespan and reproductive time became shorter after transferring from wheat to oat.When transferring from barley to wheat or oat,nymph developmental time became shorter while net reproductive rate increased.After transferring to alternative hosts,both adult survival rate and fecundity of S.avenae changed significantly.【Conclusion】 S.avenae clones presented significant differentiation when transferring to different host plants. |
| Key words: Sitobion avenae host plant life table population differentiation |
