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Evaluation of Cold Resistance and Semi-lethal Low Temperature (LT50)of Nine Pear Cultivars

Author

Listed:
  • Huan LIU,
  • Lijuan GAO,
  • Minghui JI,
  • Jintao XU,
  • Longfei LI,
  • Baofeng HAO

Abstract

[Objectives] To evaluate the cold resistance and semi-lethal temperature of pear cultivars, and provide a theoretical basis for the regional extension and breeding of cold-resistant pear cultivars. [Methods] Nine pear cultivars were used to study the changes in relative conductivity and cell injury rate of pear branches under low temperature stress, and the semi-lethal temperature (LT50)of pear branches was analyzed by fitting Logistic equation. [Results] The relative conductivity and cell injury rate of pear branches took on the trend of slow increase, rapid increase, and slow increase the decrease of treatment temperature. The LC50 of the nine pear cultivars were as follows: Nanguo pear -33.9 ℃, Wanyu -32.3 ℃, Red D 'Anjou -31.8 ℃, Jinfeng -31.3 ℃, Wujiuxiang -29.2 ℃, 20th Century Pear -29.1 ℃, Hanxiang -35.1 ℃, Yuluxiang -27.9 ℃ and Korla Fragrant Pear -29.2 ℃. [Conclusions] The semi-lethal temperature could reflect the cold resistance of pear trees, and Wanxiang had better cold resistance. The evaluation of cold resistance and semi-lethal temperature of pear cultivars can provide theoretical basis for regional extension and breeding of cold-resistant pear cultivars.

Suggested Citation

  • Huan LIU, & Lijuan GAO, & Minghui JI, & Jintao XU, & Longfei LI, & Baofeng HAO, . "Evaluation of Cold Resistance and Semi-lethal Low Temperature (LT50)of Nine Pear Cultivars," Asian Agricultural Research, USA-China Science and Culture Media Corporation, vol. 16(06).
    • Handle: RePEc:ags:asagre:349098
    DOI: 10.22004/ag.econ.349098
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    Keywords

    Agribusiness;

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