Journal
COMMUNICATIONS BIOLOGY
Volume 2, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s42003-019-0445-z
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Funding
- National Natural Science Foundation of China [31590821, 31622015, 31370261]
- National Basic Research Program of China [2014CB954100]
- Sichuan Provincial Department of Science and Technology [2015JQ0018]
- Sichuan University (Fundamental Research Funds for the Central Universities) [SCU2019D013, SCU 2018D006]
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Introgression may act as an important source of new genetic variation to facilitate the adaptation of organisms to new environments, yet how introgression might enable tree species to adapt to higher latitudes and elevations remains unclear. Applying whole-transcriptome sequencing and population genetic analyses, we present an example of ancient introgression from a cypress species (Cupressus gigantea) that occurs at higher latitude and elevation on the Qinghai-Tibet Plateau into a related species (C. duclouxiana), which has likely aided the latter species to extend its range by colonizing cooler and drier mountain habitats during postglacial periods. We show that 16 introgressed candidate adaptive loci could have played pivotal roles in response to diverse stresses experienced in a high-elevation environment. Our findings provide new insights into the evolutionary history of Qinghai-Tibet Plateau plants and the importance of introgression in the adaptation of species to climate change.
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