The LT50 and Heat Tolerance Adaptability of Flowering Chinese Cabbage in High Temperature

doi:10.3969/j.issn.1000-7091.2012.z1.040

Abstract

Abstract: Heat tolerance of 6 flowering Chinese cabbage cultivars were measured by semilethal temperature( LT₅₀) and the survival rate of seeded during high stress in field， and the correlation between those databases according to SAS and EXE software． The results showed that all cultivars increased following an S-curve in differenthigh stress temperature． The LT₅₀ was between 46℃ and 49℃ ． The heat tolerance of 6 cultivars decreased in the order of sijiu-19caixin， sijiu huang caixin， youlv 50 tian caixin， youlv 501 caixin， youlv 701 caixin， teqing chixin 4．The result was Significant positive correlation with the survival rate of seeded during high stress in field ahd it couldbe used as flowering Chinese cabbage heat resistance evaluation index．

Key words: Flowering Chinese cabbage, Heat tolerance, Relative electric conductivity, Semi-lethal temperature (LT₅₀)

CLC Number:

S634.9

LI Guang-guang, ZHANG Hua, HUANG Hong-di, ZHANG Cai-shun. The LT₅₀ and Heat Tolerance Adaptability of Flowering Chinese Cabbage in High Temperature[J]. ACTA AGRICULTURAE BOREALI-SINICA, doi: 10.3969/j.issn.1000-7091.2012.z1.040.

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