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International Journal of Medicinal Mushrooms
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ISSN Imprimer: 1521-9437
ISSN En ligne: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.2018026253
pages 517-536

Phenotypic and Genetic Diversity of the Culinary-Medicinal Winter Mushroom Flammulina velutipes (Agaricomycetes) in China

Qiuying Wang
Institute of Applied Mycology, Huazhong Agricultural University, Wuhan, People's Republic of China
Jingcheng Zhang
Institute of Applied Mycology, Huazhong Agricultural University, Wuhan, People's Republic of China
Chuang Li
Institute of Applied Mycology, Huazhong Agricultural University, Wuhan 430070, People's Republic of China
Bo Wang
Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu, People's Republic of China
Wenyan Nong
School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
Yinbing Bian
Institute of Applied Mycology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
Yang Xiao
Institute of Applied Mycology, Huazhong Agricultural University, Wuhan 430070, People's Republic of China

RÉSUMÉ

Flammulina velutipes is one of the mushrooms produced most widely in East Asia. In this study we investigated phenotypic variations of 7 agronomic traits in 37 F. velutipes strains from China, and we analyzed their genetic diversity with 70 simple sequence repeat markers. The Shannon information index and gene diversity were 0.894 and 0.478, respectively, demonstrating high genetic variation among the tested strains. Poor genetic variation was found among white strains, in contrast to yellow ones. Analysis of population structure resolved 2 unambiguous genetic groups in the tested F. velutipes strains, with little differentiation between them (FST = 0.016). Yellow cultivars possibly originated from indigenous wild strains in southwest China. Phenotypic correlations were identified among the 7 traits. In particular, stipe length (SL) was significantly positively correlated with yield, indicating that SL could be used as an index for breeding high-yield strains. The 2 genetic groups, and white strains and yellow ones, showed significant differences between SL, yield, and the time interval (days) from mycelial scratch to formation of the first fruiting body. These results indicate that these 3 traits were stratified by population structure. Detection of genetic and phenotypic variations would lay the groundwork for further breeding of elite F. velutipes strains.


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