| 刊名 | Asian Agricultural Research |
| 作者 | Huan LIU, Lijuan GAO, Minghui JI, Jintao XU, Longfei LI, Baofeng HAO |
| 作者单位 | Changli Institute of Pomology, Hebei Academy of Agriculture and Forestry Sciences |
| DOI | 10.19601/j.cnki.issn1943-9903.2024.06.011 |
| 年份 | 2024 |
| 刊期 | 6 |
| 页码 | 45-47 |
| 关键词 | Pear, Cold resistance, Semi-lethal temperature (LT50), Low temperature |
| 摘要 | [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. |
