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Phenotype analysis of mycelium growth regeneration after heat stress in a Lentinula edodes F-2 population

文献类型： 外文期刊

作者： Shen, Yingyue 1 ; Cai, Weiming 1 ; Zhou, Shuohong 2 ; Jin, Qunli 1 ; Feng, Weilin 1 ; Fan, Lijun 1 ; Song, Tingting 1 ; L 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Hort, 139 Shiqiao Rd, Hangzhou 310021, Zhejiang, Peoples R China

2.Zhejiang Normal Univ, Coll Chem & Life Sci, Jinhua, Peoples R China

关键词： F-2 population;heat stress;Lentinula edodes;mycelium regeneration;phenotype analysis;Shiitake mushroom

期刊名称：JOURNAL OF HORTICULTURAL SCIENCE & BIOTECHNOLOGY （ 影响因子：1.641； 五年影响因子：1.616 ）

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收录情况： SCI

摘要： Heat stress is one of the major abiotic stresses that adversely affect growth and yield in Lentinula edodes (Shiitake mushroom) under natural cultivation. In this study, two parental strains (L808 and Lsm9), an F-1 strain, and an F-2 population derived from their hybrid progeny were used to evaluate the regeneration of mycelia after heat stress. A multi-level heat stress experiment showed that the dynamics of radial mycelium expansion of the two parents followed a linear equation after heat stress treatment at 37 degrees C for 4-24 h, 42 degrees C for 4-16 h, or 45 degrees C for 4 h. Three indices were selected to describe the regeneration ability of the strains, including the number of regeneration days (NRD), the real growth rate after heat stress (V-regeneration), and the regenerative index (RI). L808 presented a faster rate of regeneration, while Lsm9 had better regeneration quality. The phenotype analysis of the F-2 population showed that these indices were controlled by multiple genetic factors with high heritability. Four strains were selected from the population, pyramiding the advantages of heat resistance from the two parents. The results will help our understanding of the genetic features of this mushroom after extreme high-temperature stress.

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