{"title":"日本“nameko”蘑菇(微孢子菌)通过木屑为基础的栽培表现出严重的遗传瓶颈与单一的创始人。","authors":"Akira S Hirao, Atsushi Kumata, Toshihito Takagi, Yoshito Sasaki, Takashi Shigihara, Eiichi Kimura, Shingo Kaneko","doi":"10.47371/mycosci.2022.03.002","DOIUrl":null,"url":null,"abstract":"<p><p><i>Pholiota microspora</i> (\"nameko\" in Japanese) is one of the most common edible mushrooms, especially in Japan, where sawdust-based cultivation is the most dominant method accounting for 99% of the production. The current strains for sawdust cultivation in Japan are considered to have been derived from a single wild strain collected from Fukushima, Japan, implying that commercial nameko mushrooms are derived from a severe genetic bottleneck. We tested this single founder hypothesis by developing 14 microsatellite markers for <i>P. microspora</i> to evaluate the genetic diversity of 50 cultivars and 73 wild strains isolated from across Japan. Microsatellite analysis demonstrated that sawdust-cultivated strains from Japan were significantly less genetically diverse than the wild strains, and the former displayed a significant bottleneck signature. Analyzing the genetic relationships among all genotypes also revealed that the sawdust-cultivated samples clustered into one monophyletic subgroup. Moreover, the sawdust-cultivated samples in Japan were more closely related than full-sibs. These results were consistent with the single founder hypothesis that suggests that all commercial nameko mushrooms produced in Japan are descendants of a single ancestor. Therefore, we conclude that cultivated <i>P. microspora</i> originated from a single domestication event that substantially reduced the diversity of commercial nameko mushrooms in Japan.</p>","PeriodicalId":18780,"journal":{"name":"Mycoscience","volume":null,"pages":null},"PeriodicalIF":1.5000,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/61/e9/MYC-63-079.PMC10012341.pdf","citationCount":"0","resultStr":"{\"title\":\"Japanese \\\"nameko\\\" mushrooms (<i>Pholiota microspora</i>) produced via sawdust-based cultivation exhibit severe genetic bottleneck associated with a single founder.\",\"authors\":\"Akira S Hirao, Atsushi Kumata, Toshihito Takagi, Yoshito Sasaki, Takashi Shigihara, Eiichi Kimura, Shingo Kaneko\",\"doi\":\"10.47371/mycosci.2022.03.002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p><i>Pholiota microspora</i> (\\\"nameko\\\" in Japanese) is one of the most common edible mushrooms, especially in Japan, where sawdust-based cultivation is the most dominant method accounting for 99% of the production. The current strains for sawdust cultivation in Japan are considered to have been derived from a single wild strain collected from Fukushima, Japan, implying that commercial nameko mushrooms are derived from a severe genetic bottleneck. We tested this single founder hypothesis by developing 14 microsatellite markers for <i>P. microspora</i> to evaluate the genetic diversity of 50 cultivars and 73 wild strains isolated from across Japan. Microsatellite analysis demonstrated that sawdust-cultivated strains from Japan were significantly less genetically diverse than the wild strains, and the former displayed a significant bottleneck signature. Analyzing the genetic relationships among all genotypes also revealed that the sawdust-cultivated samples clustered into one monophyletic subgroup. Moreover, the sawdust-cultivated samples in Japan were more closely related than full-sibs. These results were consistent with the single founder hypothesis that suggests that all commercial nameko mushrooms produced in Japan are descendants of a single ancestor. Therefore, we conclude that cultivated <i>P. microspora</i> originated from a single domestication event that substantially reduced the diversity of commercial nameko mushrooms in Japan.</p>\",\"PeriodicalId\":18780,\"journal\":{\"name\":\"Mycoscience\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.5000,\"publicationDate\":\"2022-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/61/e9/MYC-63-079.PMC10012341.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Mycoscience\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.47371/mycosci.2022.03.002\",\"RegionNum\":4,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MYCOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mycoscience","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.47371/mycosci.2022.03.002","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MYCOLOGY","Score":null,"Total":0}
Japanese "nameko" mushrooms (Pholiota microspora) produced via sawdust-based cultivation exhibit severe genetic bottleneck associated with a single founder.
Pholiota microspora ("nameko" in Japanese) is one of the most common edible mushrooms, especially in Japan, where sawdust-based cultivation is the most dominant method accounting for 99% of the production. The current strains for sawdust cultivation in Japan are considered to have been derived from a single wild strain collected from Fukushima, Japan, implying that commercial nameko mushrooms are derived from a severe genetic bottleneck. We tested this single founder hypothesis by developing 14 microsatellite markers for P. microspora to evaluate the genetic diversity of 50 cultivars and 73 wild strains isolated from across Japan. Microsatellite analysis demonstrated that sawdust-cultivated strains from Japan were significantly less genetically diverse than the wild strains, and the former displayed a significant bottleneck signature. Analyzing the genetic relationships among all genotypes also revealed that the sawdust-cultivated samples clustered into one monophyletic subgroup. Moreover, the sawdust-cultivated samples in Japan were more closely related than full-sibs. These results were consistent with the single founder hypothesis that suggests that all commercial nameko mushrooms produced in Japan are descendants of a single ancestor. Therefore, we conclude that cultivated P. microspora originated from a single domestication event that substantially reduced the diversity of commercial nameko mushrooms in Japan.
期刊介绍:
Mycoscience is the official English-language journal of the Mycological Society of Japan and is issued bimonthly. Mycoscience publishes original research articles and reviews on various topics related to fungi including yeasts and other organisms that have traditionally been studied by mycologists. The research areas covered by Mycoscience extend from such purely scientific fields as systematics, evolution, phylogeny, morphology, ecology, physiology, biochemistry, genetics, and molecular biology, to agricultural, medical, and industrial applications. New and improved applications of well-established mycological techniques and methods are also covered.