Environment‐dependent introgression from <i>Quercus dentata</i> to a coastal ecotype of <i>Quercus mongolica</i> var. <i>crispula</i> in northern Japan
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- Teruyoshi Nagamitsu
- Hokkaido Research Center, Forestry and Forest Products Research Institute Forest Research and Management Organization Sapporo 062‐8516 Japan
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- Kentaro Uchiyama
- Department of Forest Molecular Genetics and Biotechnology Forestry and Forest Products Research Institute Forest Research and Management Organization Tsukuba 305‐8687 Japan
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- Ayako Izuno
- Department of Forest Molecular Genetics and Biotechnology Forestry and Forest Products Research Institute Forest Research and Management Organization Tsukuba 305‐8687 Japan
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- Hajime Shimizu
- Greenery Research and Information Center Forestry Research Institute Hokkaido Research Organization Bibai 079‐0198 Japan
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- Atsushi Nakanishi
- Hokkaido Research Center, Forestry and Forest Products Research Institute Forest Research and Management Organization Sapporo 062‐8516 Japan
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<jats:title>Summary</jats:title><jats:p> <jats:list list-type="bullet"> <jats:list-item><jats:p>Introgression from one species in a specific environment to another may facilitate colonization of the environment by the recipient species. However, such environment‐dependent introgression has been clarified in limited plant taxa.</jats:p></jats:list-item> <jats:list-item><jats:p>In northern Japan, there are two interfertile oak species: <jats:italic>Quercus dentata</jats:italic> (<jats:italic>Qd</jats:italic>) in coastal areas and <jats:italic>Q. mongolica</jats:italic> var. <jats:italic>crispula</jats:italic> (<jats:italic>Qc</jats:italic>) in inland areas. However, at higher latitudes where <jats:italic>Qd</jats:italic> is rare, a coastal <jats:italic>Qc</jats:italic> ecotype with <jats:italic>Qd</jats:italic>‐like traits is distributed in the coastal areas. We distinguished inland <jats:italic>Qc</jats:italic>, coastal <jats:italic>Qc</jats:italic>, and coastal <jats:italic>Qd</jats:italic> populations based on genome‐wide genotypes and multitrait phenotypes and verified introgression from coastal <jats:italic>Qd</jats:italic> to coastal <jats:italic>Qc</jats:italic> using reduced library sequencing.</jats:p></jats:list-item> <jats:list-item><jats:p>Genotypes and phenotypes differed among the populations, and coastal <jats:italic>Qc</jats:italic> was intermediate between inland <jats:italic>Qc</jats:italic> and coastal <jats:italic>Qd</jats:italic>. The ABBA–BABA test showed introgression from coastal <jats:italic>Qd</jats:italic> to coastal <jats:italic>Qc</jats:italic>. In coastal <jats:italic>Qc</jats:italic>, we found various stages of introgression after the first generation of backcross but detected no genomic regions where introgression was enhanced.</jats:p></jats:list-item> <jats:list-item><jats:p>Overall, we show evidence for introgression from a coastal species to an ecotype of an inland species, which has colonized the coastal environment. It remains unclear whether introgressed alleles are selected in the coastal environment.</jats:p></jats:list-item> </jats:list> </jats:p>
収録刊行物
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- New Phytologist
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New Phytologist 226 (4), 1018-1028, 2019-09-23
Wiley