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HGT is widespread in insects and contributes to male courtship in lepidopterans

Cell. 2022-08; 
Yang Li , Zhiguo Liu , Chao Liu , Zheyi Shi , Lan Pang , Chuzhen Chen , Yun Chen , Ronghui Pan , Wenwu Zhou , Xue-Xin Chen , Antonis Rokas , Jianhua Huang , Xing-Xing Shen
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摘要

Horizontal gene transfer (HGT) is an important evolutionary force shaping prokaryotic and eukaryotic genomes. HGT-acquired genes have been sporadically reported in insects, a lineage containing >50% of animals. We systematically examined HGT in 218 high-quality genomes of diverse insects and found that they acquired 1,410 genes exhibiting diverse functions, including many not previously reported, via 741 distinct transfers from non-metazoan donors. Lepidopterans had the highest average number of HGT-acquired genes. HGT-acquired genes containing introns exhibited substantially higher expression levels than genes lacking introns, suggesting that intron gains were likely involved in HGT adaptation. Lastly, we used... More

关键词

HGT; adaptive evolution; biodiversity; comparative genomics; intron gain; male courtship behavior; symbionts.