黑龙江农业科学Issue(3)：1-7,7.DOI:10.11942/j.issn1002-2767.2025.03.0001
52份玉米新材料萌发期耐冷性鉴定与评价
Identification and Evaluation of Low Temperature Tolerance of 52 New Maize Materials at Germination Stage
摘要
Abstract
In order to systematically analyze the differences in cold germination tolerance characteristics of maize germplasm resources and screen the excellent low temperature tolerance germplasm resources,52 new maize materials were used as experimental materials,and 12 indexes related to cold tolerance of maize seeds,such as germination rate,germination index,average germination time,germination potential and relative value of traits,were determined at 5 ℃ and 25 ℃ respectively.The cold resistance of maize materials was analyzed and evaluated comprehensively by using correlation analysis,principal component analysis,membership function analysis and cluster analysis.The results showed that the cold germination tolerance of 52 maize materials showed very rich genetic variation.Correlation analysis showed that there were significant positive correlations among the 8 cold tolerance traits.Principal component analysis divided 8 individual indicators into 3 independent comprehensive indicators,with a cumulative contribution rate of 93.84％.Based on the comprehensive D value of cold resistance,cluster analysis was conducted on 52 new maize materials,and they were divided into 4 low temperature resistance grades,among which 19 were the strongest,19 were strong,11 were weak and 3 were the weakest.This study provided the core parental selection basis for the innovation of cold tolerant germplasm and methodological reference for crop stress resistance evaluation.关键词
玉米/萌发期/耐冷性/主成分分析/聚类分析Key words
maize/germination stage/cold resistance/principal component analysis/cluster analysis引用本文复制引用
马雪娜,于滔,张建国,曹士亮,杨耿斌,李文跃..52份玉米新材料萌发期耐冷性鉴定与评价[J].黑龙江农业科学,2025,(3):1-7,7.基金项目
黑龙江省科研业务费项目(CZKYF2025-1-B002) （CZKYF2025-1-B002）
黑龙江省农业科学院创新工程资助项目(CX23ZD05,CX23JQ04) （CX23ZD05,CX23JQ04）
黑龙江省种业创新发展项目 （）
国家玉米产业技术体系项目(CARS-02-07) （CARS-02-07）
科技创新2030-重大项目(2023ZD0402702). （2023ZD0402702）
