玉米DH系重要性状筛选评价  

作　　者：苏海荣 李春雷 

机构地区：[1]吉林农业科技学院,吉林吉林132101

出　　处：《智慧农业导刊》2024年第18期48-51,共4页JOURNAL OF SMART AGRICULTURE

基　　金：吉林省教育厅科学技术研究项目(JJKH20230445KJ)。

摘　　要：玉米育种的关键是优良玉米自交系的选育,通过玉米双单倍体育种(Double Haploid)技术可快速、批量生产玉米自交系。因此,DH系的筛选、评价成为双单倍体育种技术的关键。该研究旨在为DH系的筛选、评价提供理论支持。以美国玉米自交系M4和M61及其1 000个DH为试验材料,以表型性状的优劣为鉴选依据,对1 000个玉米DH系的7个性状进行筛选评价。通过研究表明,77.2%的玉米自交系干旱卷曲度较低;77.8%的玉米自交系抗大斑病;52.6%的玉米自交系抗弯孢菌叶斑病;43.1%的玉米自交系地上根数大于19个;50.8%的玉米自交系地下根数大于32个;52.3%的玉米交系的抗倒伏拉力大于15 N;51.2%的玉米自交系茎秆粗大于或等于20.2 mm。通过重要性状指标的筛选,73份玉米DH的综合性状较优良,筛选比例为0.73%。The key of maize breeding is the breeding of excellent maize inbred lines,which can be quickly and mass produced by maize double haploid breeding(Double Haploid)technology.Therefore,the screening and evaluation of DH lines have become the key part of double haploid breeding technology.This study aims to provide theoretical support for the screening and evaluation of DH lines.The M4 and M61,1000 DH and 1000 maize lines were selected and evaluated from the 1000 maize DH lines.We show that 77.2%maize selfers have low drought curvature;77.8%maize selfers resist large spot disease;52.6%maize selfers resist leaf spot disease;43.1%have more than 19 roots;50.8%have more than 32 roots;52.3%maize selfers have lodging resistance of greater than 15 N;51.2%maize selfers have stems of greater than or equal to 20.2 mm.Through the screening of important traits,73 maize DH had excellent comprehensive traits,with a screening ratio of 0.73%.

关 键 词：玉米 DH系 叶斑病 抗倒伏 耐旱性 

分 类 号：S513[农业科学—作物学]