Intraspecific genetic divergence of the subalpine shrubby variety Quercus crispula var. horikawae from the mountain tree variety Q. crispula var. crispula in Japan
{"title":"Intraspecific genetic divergence of the subalpine shrubby variety Quercus crispula var. horikawae from the mountain tree variety Q. crispula var. crispula in Japan","authors":"Lerma San Jose-Maldia, Asako Matsumoto, Teruyoshi Nagamitsu, Saneyoshi Ueno, Yoshihiko Tsumura","doi":"10.1111/1442-1984.12447","DOIUrl":null,"url":null,"abstract":"Ecotypic divergence in tree taxa often occurs in subalpine habitats, where environmental conditions are more stressful than those in lower elevations. In the white oak species in Japan <i>Quercus crispula</i>, the subalpine shrubby variety <i>Q. crispula</i> var. <i>horikawae</i> (<i>Qch</i>) has been recognized in central and northern Honshu. Although <i>Qch</i> has different phenotypes from <i>Q. crispula</i> var. <i>crispula</i> (<i>Qcc</i>), genetic divergence between <i>Qcc</i> and <i>Qch</i> has not been examined yet. Pairs of <i>Qcc</i> and <i>Qch</i> populations in eight locations and additional <i>Qcc</i> and <i>Qch</i> populations around these locations were investigated. Leaf size of <i>Qch</i> was smaller than that of <i>Qcc</i>. Chloroplast DNA haplotypes were shared between the <i>Qcc</i> and <i>Qch</i> populations. In genotypes at 29 nuclear microsatellite loci, genetic diversity did not differ between the <i>Qcc</i> and <i>Qch</i> populations. Principal component analysis and a neighbor-joining tree of populations based on the genotypes demonstrated that 13 <i>Qcc</i> populations and eight <i>Qch</i> populations were grouped separately, except for three <i>Qch</i> populations that were grouped to <i>Qcc</i>. Climatic conditions in the eight <i>Qch</i> populations were characterized by lower temperature and heavier snowfall than those in the 16 populations of the genetic group of <i>Qcc</i>. These results suggest genetic divergence between <i>Qcc</i> and <i>Qch</i> associated with subalpine climatic conditions, irrespective of leaf size. The origin of the subalpine <i>Qch</i> lineage and the history of ecotypic divergence should be investigated in future genomic studies.","PeriodicalId":54601,"journal":{"name":"Plant Species Biology","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2024-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plant Species Biology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1111/1442-1984.12447","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ECOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Ecotypic divergence in tree taxa often occurs in subalpine habitats, where environmental conditions are more stressful than those in lower elevations. In the white oak species in Japan Quercus crispula, the subalpine shrubby variety Q. crispula var. horikawae (Qch) has been recognized in central and northern Honshu. Although Qch has different phenotypes from Q. crispula var. crispula (Qcc), genetic divergence between Qcc and Qch has not been examined yet. Pairs of Qcc and Qch populations in eight locations and additional Qcc and Qch populations around these locations were investigated. Leaf size of Qch was smaller than that of Qcc. Chloroplast DNA haplotypes were shared between the Qcc and Qch populations. In genotypes at 29 nuclear microsatellite loci, genetic diversity did not differ between the Qcc and Qch populations. Principal component analysis and a neighbor-joining tree of populations based on the genotypes demonstrated that 13 Qcc populations and eight Qch populations were grouped separately, except for three Qch populations that were grouped to Qcc. Climatic conditions in the eight Qch populations were characterized by lower temperature and heavier snowfall than those in the 16 populations of the genetic group of Qcc. These results suggest genetic divergence between Qcc and Qch associated with subalpine climatic conditions, irrespective of leaf size. The origin of the subalpine Qch lineage and the history of ecotypic divergence should be investigated in future genomic studies.
期刊介绍:
Plant Species Biology is published four times a year by The Society for the Study of Species Biology. Plant Species Biology publishes research manuscripts in the fields of population biology, pollination biology, evolutionary ecology, biosystematics, co-evolution, and any other related fields in biology. In addition to full length papers, the journal also includes short research papers as notes and comments. Invited articles may be accepted or occasion at the request of the Editorial Board. Manuscripts should contain new results of empirical and/or theoretical investigations concerning facts, processes, mechanisms or concepts of evolutionary as well as biological phenomena. Papers that are purely descriptive are not suitable for this journal. Notes & comments of the following contents will not be accepted for publication: Development of DNA markers. The journal is introducing ''Life history monographs of Japanese plant species''. The journal is dedicated to minimizing the time between submission, review and publication and to providing a high quality forum for original research in Plant Species Biology.