期刊
SCIENCE
卷 344, 期 6190, 页码 1410-1414出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1253226
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资金
- VolkswagenStiftung grant [I/83 496]
- Swedish Research Council [621-2010-5553]
- Wallenberg Advanced Bioinformatics Infrastructure - (Knut and Alice Wallenberg Foundation)
- Carl Tryggers foundation [CTS11:517, CTS12:543]
- European Research Council [ERCStG-336536]
- Max Planck Society
- SciLifeLab Uppsala
- Knut and Alice Wallenberg Foundation
- Swedish National Infrastructure for Computing
- NCBI [PRJNA192205]
The importance, extent, and mode of interspecific gene flow for the evolution of species has long been debated. Characterization of genomic differentiation in a classic example of hybridization between all-black carrion crows and gray-coated hooded crows identified genome-wide introgression extending far beyond the morphological hybrid zone. Gene expression divergence was concentrated in pigmentation genes expressed in gray versus black feather follicles. Only a small number of narrow genomic islands exhibited resistance to gene flow. One prominent genomic region (<2 megabases) harbored 81 of all 82 fixed differences (of 8.4 million single-nucleotide polymorphisms in total) linking genes involved in pigmentation and in visual perception-a genomic signal reflecting color-mediated prezygotic isolation. Thus, localized genomic selection can cause marked heterogeneity in introgression landscapes while maintaining phenotypic divergence.
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