A genetic mechanism for sexual dichromatism in birds

doi:10.1126/science.aba0803

GSTDTAP > 气候变化

DOI	10.1126/science.aba0803
	A genetic mechanism for sexual dichromatism in birds
	Małgorzata A. Gazda; Pedro M. Araújo; Ricardo J. Lopes; Matthew B. Toomey; Pedro Andrade; Sandra Afonso; Cristiana Marques; Luís Nunes; Paulo Pereira; Sandra Trigo; Geoffrey E. Hill; Joseph C. Corbo; Miguel Carneiro
	2020-06-12
发表期刊	Science
出版年	2020
英文摘要	Many animals are sexually dimorphic, with different phenotypes in males and females. To identify the genetic basis of sexual differences in bird coloration, Gazda et al. investigated red coloration in mosaic canaries and related species (see the Perspective by Chen). Using a combination of genetic crosses, genomic mapping, transcriptomics, and comparative analyses, the authors show that trans-regulation of the carotenoid-processing gene BCO2 is involved in sexual dichromatism. Although such variation in coloration among the sexes is common, particularly in birds, there are few candidate genes known to be involved. This study helps to elucidate the molecular mechanisms that underlie the evolution of dichromatism and may aid in uncovering sexually selected traits. Science , this issue p. [1270][1]; see also p. [1185][2] Sexual dichromatism, a difference in coloration between males and females, may be due to sexual selection for ornamentation and mate choice. Here, we show that carotenoid-based dichromatism in mosaic canaries, a hybrid phenotype that arises in offspring of the sexually dichromatic red siskin and monochromatic canaries, is controlled by the gene that encodes the carotenoid-cleaving enzyme β-carotene oxygenase 2 ( BCO2 ). Dichromatism in mosaic canaries is explained by differential carotenoid degradation in the integument, rather than sex-specific variation in physiological functions such as pigment uptake or transport. Transcriptome analyses suggest that carotenoid degradation in the integument might be a common mechanism contributing to sexual dichromatism across finches. These results suggest that differences in ornamental coloration between sexes can evolve through simple molecular mechanisms controlled by genes of major effect. [1]: /lookup/doi/10.1126/science.aba0803 [2]: /lookup/doi/10.1126/science.abc2242
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/274476
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Małgorzata A. Gazda,Pedro M. Araújo,Ricardo J. Lopes,et al. A genetic mechanism for sexual dichromatism in birds[J]. Science,2020.
APA	Małgorzata A. Gazda.,Pedro M. Araújo.,Ricardo J. Lopes.,Matthew B. Toomey.,Pedro Andrade.,...&Miguel Carneiro.(2020).A genetic mechanism for sexual dichromatism in birds.Science.
MLA	Małgorzata A. Gazda,et al."A genetic mechanism for sexual dichromatism in birds".Science (2020).