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对菜心进行了耐热性离体筛选的研究，结果表明，耐热性不同的菜心品种在离体培养中的热胁迫反应亦有所差异，３５ ℃培养３０ 天的无菌苗存活率可以作为菜心耐热离体筛选的选择指标。通过热胁迫交替选择，初步筛选出３ 个耐热无性系。同时还发现，通过热胁迫选出的无性系其茎尖繁殖系数也较原群体有所提高
The heat tolerance of Brassica parachinensis Sieb.et Zucc was studied in vitro. The results showed that the thermal stress responses of Brassica campestris var. Chinensis cultivars with different heat tolerance also varied in vitro. The survival rate of germ-free shoots cultured at 35 ℃ for 30 days Can be used as a cucumber heart heat selection in vitro screening indicators. Three heat-resistant clones were initially screened by heat stress. At the same time, we also found that the clonal propagation coefficient of clones selected by heat stress was also higher than the original population