新疆农业科学2018，Vol.55Issue(4)：674-681,8.DOI:10.6048/j.issn.1001-4330.2018.04.010
库尔勒香梨×褐色句句梨F1代抗寒性研究
Study on the Cold Resistance of F1 Generation Korla Fragrant Pear × Hesejujuli
摘要
Abstract
[Objective] In order to understand the cold resistance of two parents and their effects on off-spring and provide a theoretical basis for breeding cold resistance of Korla pear hybrids.[Method]Using 3 year old F1 generation of Korla fragrant pear × Hesejujuli and its parent group as the research object, the e-lectrolyte leakage rate, soluble sugar content, free proline content, MDA content, SOD activity and the recov-ery germination rate were determined after the annual dormant shoots were treated under different artificial low temperature stress. [Result]The electrolyte leakage rate, MDA content, soluble sugar content, free proline content of three group annual dormancy branch increased gradually following with the temperature decreased, then remained stable or declined slightly; the SOD activity increased gradually as the temperature decreased, and got the peak at semi lethal temperature ( LT50) , and then it goes down rapidly. The branches germination rate decreased gradually following with the temperature decreased, which were no longer germination when the temperature exceeds the -33℃. In the three group branches, the annual dormant branches of male parent Hesejujuli showing strong cold resistance that the electrolytic leakage rate and MDA content were the lowest, and the soluble sugar, free proline content, germination rate and SOD activity were the highest. The cold re-sistance of the male parent Hesejujuli and of the F1 generation Korla Fragrant Pear × Hesejujuli shows stron-ger than that of female parent Korla Fragrant Pear, in which the cold resistance of F1 generation a little weaker than that of Hesejujuli. [Conclusion]The male parent with strong cold resistance can greatly improve the cold resistance of the hybrid progeny.关键词
库尔勒香梨/褐色句句梨/F1代群体/抗寒性Key words
Korla fragrant pear/Hesejujuli/F1 generation group/cold resistance分类
农业科技引用本文复制引用
阿布来克·尼牙孜,李超海,章世奎,阿曼古丽·吾斯曼,唐章虎,董胜利..库尔勒香梨×褐色句句梨F1代抗寒性研究[J].新疆农业科学,2018,55(4):674-681,8.基金项目
新疆维吾尔自治区科研院所改革与发展专项资金项目"库尔勒香梨杂种实生苗早期鉴定及种质创新"(KYGY2016115)The Special Fund Project of Reform and Development of Xinjiang Uygur Autonomous Region of China Research Institutes, " Early I-dentification and Germplasm Innovation of Hybrid Seedlings of Korla Fragrant Pear"(KYGY2016115) （KYGY2016115）
