Testing the fecundity advantage hypothesis with Sitobion avenae, Rhopalosiphum padi, and Schizaphis graminum (Hemiptera: Aphididae) feeding on ten wheat accessions.
Testing the fecundity advantage hypothesis with Sitobion avenae, Rhopalosiphum padi, and Schizaphis graminum (Hemiptera: Aphididae) feeding on ten wheat accessions.
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DOI：
10.1038/srep18549
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发表时间：
2015-12-18
影响因子：
4.6
通讯作者：
Zhao HY
中科院分区：
文献类型：
--
作者：
Hu XS;Liu XF;Thieme T;Zhang GS;Liu TX;Zhao HY
繁殖力优势假说表明，体型较大的雌性比较体型较小的雌性产生更多的后代。我们通过探索以十种小麦材料为食的三种蚜虫的生活史性状之间的相关性来检验这一假设，并在与寄主植物有关的三个分析水平上：总体、种质间和种质内。我们发现，繁殖力与平均相对生长率（MRGR）、体重增加和发育时间显着相关，并且蚜虫发育得越快，身体和繁殖力就越大，这取决于蚜虫种类、小麦种质和分析水平。所有三个物种中较大的蚜虫总体上产生了更多的后代；对于种质间水平的 Sitobion avenae 和 Schizaphis graminum 而言，以及在种质内水平上，对于 3 个、5 个和 8 个种质而言，S. avenae、Rhopalosiphum padi 和 S. graminum 均是如此。在所有三个分析水平上，对于所有蚜虫物种而言，自然增长率 (rm) 和 MRGR 之间只有一种相关性显着。繁殖力优势假说的更准确表述是，具有较高 MRGR 的谷类蚜虫通常对小麦保持较高的 rm。我们的结果还提供了一种探索寄主植物上昆虫个体生活史特征与种群动态之间关系的方法。
The fecundity advantage hypothesis suggests that females with a large body size produce more offspring than smaller females. We tested this hypothesis by exploring the correlations between life-history traits of three aphid species feeding on ten wheat accessions at three levels of analysis with respect to the host plant: overall, inter-accession, and intra-accession. We found that fecundity was significantly correlated with mean relative growth rate (MRGR), weight gain, and development time, and that the faster aphid develops the greater body and fecundity, depending on aphid species, wheat accession, and analyses level. Larger aphids of all three species produced more offspring overall; this held true for Sitobion avenae and Schizaphis graminum at the inter-accession level, and for S. avenae, Rhopalosiphum padi, and S. graminum for three, five, and eight accessions respectively at the intra-accession level. Only one correlation, between intrinsic rates of natural increase (rm) and MRGR, was significant for all aphid species at all three analysis levels. A more accurate statement of the fecundity advantage hypothesis is that cereal aphids with greater MRGR generally maintain higher rm on wheat. Our results also provide a method for exploring relationships between individual life-history traits and population dynamics for insects on host plants.