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A Comparative Transcriptome Analysis of Volvariella volvacea Identified the Candidate Genes Involved in Fast Growth at the Mycelial Growth Stage

1
Vegetables Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Key Laboratory for New Technology Research of Vegetables, Guangzhou 510640, China
2
Agro-biological Gene Research Center, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
3
School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China
4
Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48824, USA
*
Authors to whom correspondence should be addressed.
These authors have contributed equally to this work.
Genes 2020, 11(2), 161; https://doi.org/10.3390/genes11020161
Received: 20 January 2020 / Accepted: 1 February 2020 / Published: 4 February 2020
(This article belongs to the Section Microbial Genetics and Genomics)
The edible straw mushroom, Volvariella volvacea, is one of the most important cultivated mushrooms in tropical and sub-tropical regions. Strain improvement for V. volvacea is difficult because of the unknown mechanisms involved in its growth regulation and substrate utilization. A comparative physiological and transcriptomic study was conducted between two commercially available straw mushroom strains (v9 and v26) to explore their fast-growth regulation mechanism(s). The physiological study showed that V. volvacea v9 had a shorter growth cycle and higher biological efficiency (4% higher) than that in v26. At least 14,556 unigenes were obtained from the four cDNA libraries (two replicates per strain). Among them, the expression of 1597 unigenes was up-regulated while 1352 were down-regulated. Four heat-shock proteins were highly expressed in v9, showing that v9 has the better ability to handle stresses and/or environmental changes. Moreover, up to 14 putative transporter genes were expressed at a higher level in v9 than those in v26, implying that v9 has a better ability to transport nutrients or export xenobiotics efficiently. Our report allows to identify the candidate genes involved in the fast growth requirement of V. volvacea, which represents a valuable resource for strain improvement in this commercially important edible mushroom.
Keywords: Volvariella volvacea; transcriptome; growth performance Volvariella volvacea; transcriptome; growth performance
MDPI and ACS Style

Liu, M.; Yu, T.; Singh, P.K.; Liu, Q.; Liu, H.; Zhu, Q.; Xiao, Z.; Xu, J.; Peng, Y.; Fu, S.; Chen, S.; He, H. A Comparative Transcriptome Analysis of Volvariella volvacea Identified the Candidate Genes Involved in Fast Growth at the Mycelial Growth Stage. Genes 2020, 11, 161.

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