Genomic architecture underlying morphological and physiological adaptation to high elevation in a songbird

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	Genomic architecture underlying morphological and physiological adaptation to high elevation in a songbird
	Lu, CW; Huang, ST; Cheng, SJ; Lin, CT; Hsu, YC; Yao, CT; Dong, F; Hung, CM; Kuo, HC
	2023
发表期刊	MOLECULAR ECOLOGY
ISSN	0962-1083
卷号	32 期号:9 页码:2234-2251
摘要	Organisms often acquire physiological and morphological modifications to conquer ecological challenges when colonizing new environments which lead to their adaptive evolution. However, deciphering the genomic mechanism of ecological adaptation is difficult because ecological environments are often too complex for straightforward interpretation. Thus, we examined the adaptation of a widespread songbird-the rufous-capped babbler (Cyanoderma ruficeps)-to a relatively simple system: distinct environments across elevational gradients on the mountainous island of Taiwan. We focused on the genomic sequences of 43 birds from five populations to show that the Taiwan group split from its sister group in mainland China around 1-2 million years ago (Ma) and colonized the montane habitats of Taiwan at least twice around 0.03-0.22 Ma. The montane and lowland Taiwan populations diverged with gene flow between them, suggesting strong selection associated with different elevations. We found that the montane babblers had smaller beaks than the lowland ones, consistent with Allen's rule, and identified candidate genes-COL9A1 and SOX11-underlying the beak size changes. We also found that altitudinally divergent mutations were mostly located in noncoding regions and tended to accumulate in chromosomal inversions and autosomes. The altitudinally divergent mutations might regulate genes related to haematopoietic, metabolic, immune, auditory and vision functions, as well as cerebrum morphology and plumage development. The results reveal the genomic bases of morphological and physiological adaptation in this species to the low temperature, hypoxia and high UV light environment at high elevation. These findings improve our understanding of how ecological adaptation drives population divergence from the perspective of genomic architecture.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.kiz.ac.cn/handle/152453/14044
专题	科研部门_鸟类学（杨晓君）
推荐引用方式 GB/T 7714	Lu, CW,Huang, ST,Cheng, SJ,et al. Genomic architecture underlying morphological and physiological adaptation to high elevation in a songbird[J]. MOLECULAR ECOLOGY,2023,32(9):2234-2251.
APA	Lu, CW.,Huang, ST.,Cheng, SJ.,Lin, CT.,Hsu, YC.,...&Kuo, HC.(2023).Genomic architecture underlying morphological and physiological adaptation to high elevation in a songbird.MOLECULAR ECOLOGY,32(9),2234-2251.
MLA	Lu, CW,et al."Genomic architecture underlying morphological and physiological adaptation to high elevation in a songbird".MOLECULAR ECOLOGY 32.9(2023):2234-2251.

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