Dispersal from the Qinghai-Tibet plateau by a high-altitude butterfly is associated with rapid expansion and reorganization of its genome.
Dispersal from the Qinghai-Tibet plateau by a high-altitude butterfly is associated with rapid expansion and reorganization of its genome.
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DOI：
10.1038/s41467-023-44023-2
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发表时间：
2023-12-11
影响因子：
16.6
通讯作者：
Hao, Jiasheng
中科院分区：
文献类型：
--
作者：
Zhao, Youjie;Su, Chengyong;He, Bo;Nie, Ruie;Wang, Yunliang;Ma, Junye;Song, Jingyu;Yang, Qun;Hao, Jiasheng
冰川绢蝶是一种典型的“走出青藏高原”的高山蝴蝶，起源于青藏高原（QTP），后散布到海拔相对较低的山区。本研究构建了一个冰川松染色体水平的基因组，并对9个居群进行了重测序，以探讨该物种的基因组进化和地方适应性。这些结果表明，转座因子（TEs）的快速积累和缓慢的不均等重组是其大基因组形成的重要原因。一些核糖体基因家族通过转座子介导的加工假基因表现出广泛的扩展和选择性进化。此外，大规模的结构变异（SV）的TE影响低海拔群体的遗传分化。这些低海拔种群可能在过去经历了遗传瓶颈，并且具有选择性特征的基因可能是对低海拔环境的潜在适应的原因。这些结果为理解冰川冰草基因组的进化和“跳出QTP”的局部适应性提供了基础。摘要冰川绢蝶在离开青藏高原后经历了巨大的环境变迁。在这里，作者发现P. glacialis具有异常大的基因组，快速积累的转座因子可能有助于其进化适应。
Parnassius glacialis is a typical “Out of the QTP” alpine butterfly that originated on the Qinghai-Tibet Plateau (QTP) and dispersed into relatively low-altitude mountainous. Here we assemble a chromosome-level genome of P. glacialis and resequence 9 populations in order to explore the genome evolution and local adaptation of this species. These results indicated that the rapid accumulation and slow unequal recombination of transposable elements (TEs) contributed to the formation of its large genome. Several ribosomal gene families showed extensive expansion and selective evolution through transposon-mediated processed pseudogenes. Additionally, massive structural variations (SVs) of TEs affected the genetic differentiation of low-altitude populations. These low-altitude populations might have experienced a genetic bottleneck in the past and harbor genes with selective signatures which may be responsible for the potential adaptation to low-altitude environments. These results provide a foundation for understanding genome evolution and local adaptation for “Out of the QTP” of P. glacialis. The butterfly Parnassius glacialis experienced vast environmental transition when it dispersed out of the Qinghai-Tibet plateau. Here, the authors find that P. glacialis has an unusually large genome with rapid accumulation of transposable elements possibly facilitating its evolutionary adaptation.
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影响因子：
2.6
作者：
Trense D;Hoffmann AA;Fischer K
通讯作者：
Fischer K
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通讯作者：
Wortman, Jennifer R.