Population genomic and phenotype diversity of invasive Drosophila suzukii in Hawai‘i
Population genomic and phenotype diversity of invasive Drosophila suzukii in Hawai‘i
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DOI：
10.1007/s10530-020-02217-5
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发表时间：
2020-02
影响因子：
2.9
通讯作者：
J. Koch;J. Dupuis;Marcel-Kate Jardeleza;Nadiatou Ouedraogo;S. Geib;P. Follett;D. Price
中科院分区：
文献类型：
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作者：
J. Koch;J. Dupuis;Marcel-Kate Jardeleza;Nadiatou Ouedraogo;S. Geib;P. Follett;D. Price
在进化论的背景下，入侵生物学提供了一个奇妙的谜团：一个具有有限遗传变异的物种如何生存并适应新的环境？遗传多样性的减少通常与低适应性和进化潜力有关，但一些引入的物种已被证明是成功的入侵者，尽管在殖民化的早期阶段经历了遗传瓶颈。本研究的目的是描述自20世纪80年代入侵夏威夷群岛以来，入侵性Suzukii果蝇（双翅目：果蝇科）的种群基因组和表型多样性。翅表型分析表明，高海拔种群具有显着更大的翅膀比低海拔种群，支持的假设，昆虫科普高海拔环境发展更大的翅膀。虽然我们在所有夏威夷人中发现了低遗传多样性和分化，但用无模型多变量统计方法检测到了三个独特的遗传簇。我们确定了23个候选基因座的选择使用两个互补的分析，以检测FSToutliers在整个基因组。其中12个基因座的预测蛋白与果蝇aspp相关。化学感觉、氨基酸和钠离子转运、Ras效应子途径和胞苷脱氨基。尽管存在遗传瓶颈，但adventive D.在夏威夷群岛上，铃木种群开始分化，对关键行为和细胞过程的选择可能正在进行中。
In the context of evolutionary theory, invasion biology provides a fantastic enigma: how does a species with limited standing genetic variation survive and adapt to a novel environment? Reduced genetic diversity is typically associated with low fitness and evolutionary potential, yet some introduced species have proven to be successful invaders despite undergoing a genetic bottleneck during the early stages of colonization. Our goal in this study was to characterize population genomic and phenotype diversity of invasiveDrosophila suzukii(Diptera: Drosophilidae) since colonizing the Hawaiian archipelago as early as the 1980s. Wing phenotype analysis revealed that high altitude populations possessed significantly larger wings than low altitude populations, supporting the hypothesis that insects cope with high altitude environments by developing larger wings. While we discovered low genetic diversity and differentiation in all Hawai‘i populations, three unique genetic clusters were detected with a model-free, multivariate statistical approach. We identified 23 candidate loci under selection using two complementary analyses to detectFSToutliers across the genome. For 12 of these loci, predicted proteins are associated withDrosophilaspp. chemosensation, amino acid and sodium ion transport, a Ras effector pathway, and cytidine deamination. Despite a genetic bottleneck, adventiveD. suzukiipopulations are beginning to differentiate across the Hawaiian archipelago and selection for key behavioral and cellular processes are likely ongoing.