中国农业大学学报2025，Vol.30Issue(8)：50-59,10.DOI:10.11841/j.issn.1007-4333.2025.08.05
桃杂交后代抗寒性遗传倾向分析及高抗寒单株的筛选
Inherited tendency analysis of cold resistance in peach hybrid population and the screening of high cold-resistant individuals
摘要
Abstract
The inherited tendency of cold resistance in peach hybrid progeny was investigated to provide a genetic basis for parent selection in peach cold resistance breeding and cold resistance prediction in progeny plants.The freezing damage index of three peach hybrid populations and their parents were assessed under natural wintering conditions for three consecutive years.To further study the physiological change after cold stress and establish an evaluation method of cold resistance in peaches,the one-year-old dormant branches of a high-low cold-resistant combination F1 population'Donghe No.1'×'21stCentury'and their parents were treated with low temperature,the relative electrical conductivity,soluble sugar content,free proline acid content,and starch content of the branches were measured.In addition,the branches' low temperature exotherm(LTE)was measured using a differential thermal analysis system(DTA).The cold resistance of each tested individual was evaluated by the comprehensive membership function method,and the high cold-resistant individuals were identified according to the results of the cold resistance evaluation.The results showed that the mean cold-resistances of the offspring of the three hybrid combinations were 1.99,2.37 and 3.11,respectively,close to the maternal cold-resistance.The cold resistance of the hybrid progeny of'Donghe No.1'×'21st Century'was higher than that of the other two hybrid combinations.The cold resistance of the'Donghe No.1'×'21st century'hybrid was higher than that of the high-value parent'Donghe No.1'in 26 strains,and the high affinity rate was 18.6％.There were 6 points lower than the low parental'21st Century'.The ultra-low parental rate was 4％,and the ultra-high parental rate was significantly higher than the ultra-low parental rate.2)Eight high cold-resistance individual plants were selected as materials for further cold-resistance breeding.In conclusion,the inherited tendency analysis of cold resistance in peaches indicated that the resistance to freezing injury in the hybrid population exhibits a maternal genetic tendency,demonstrating hyper-progenetic characteristics and a propensity for inheritance towards stronger cold resistance.Therefore,Selecting the higher cold-resistance varieties as parents is more conducive to enhancing the cold resistance of future generations.关键词
桃/抗寒性/遗传倾向/杂交后代/隶属函数Key words
peach/cold resistance/inherited tendency/hybrid progeny/membership function分类
农业科技引用本文复制引用
田启航,李杰,田振东,王雨,王召元,刘国俭,常瑞丰,陈湖,李永红..桃杂交后代抗寒性遗传倾向分析及高抗寒单株的筛选[J].中国农业大学学报,2025,30(8):50-59,10.基金项目
河北省重点研发计划热杂果现代种业科技创新团队项目(21326310D) （21326310D）
国家现代农业产业技术体系项目(CARS-30-Z-02) （CARS-30-Z-02）
河北省农林科学院基本科研业务费青年基金项目(2023020102) （2023020102）
河北省农林科学院科技创新专项(2022KJCXZX-CGS-6) （2022KJCXZX-CGS-6）
河北省现代农业产业技术体系创新团队建设项目(HBCT2023130205) （HBCT2023130205）
