北方农业学报2025，Vol.53Issue(4)：1-10,10.DOI:10.12190/j.issn.2096-1197.2025.04.01
小麦重组自交系群体抗倒伏相关性状遗传变异分析及强秆高产种质筛选
Genetic variation analysis of lodging resistance-related traits in a wheat recombinant inbred line population and screening of germplasm with strong-stem and high-yield
摘要
Abstract
[Objective]To identify screening indicators for strong-stem wheat breeding and excavate germplasm resources that combine lodging resistance with high yield potential,thereby providing support for genetic improvement of wheat lodging resistance.[Methods]A recombinant inbred line(RIL)population was constructed by crossing the strong-stem wheat variety Luomai 163 with Kaimai 18.Eight lodging resistance-related stem traits were measured in the RIL population,including second internode strength,second internode thickness,second internode diameter,second internode length,first internode strength,plant height,fresh weight of single plant,and center of gravity height,along with four yield-related traits:thousand kernel weight,spike length,kernel number per spike,and kernel weight per spike,and by integrating variance analysis and correlation analysis,the key mechanical indicators of stem were identified;by combining cluster analysis,new germplasm lines with superior stem mechanical performance were screened,and microscopic stem structure was observed to elucidate the key factors contributing to excellent stem bending resistance.[Results]The RIL population exhibited transgressive segregation for lodging resistance-related stem traits,with particularly prominent genetic variation potential in second internode strength,second internode thickness,and first internode strength.Second internode diameter,second internode thickness,and second internode strength collectively constituted the key mechanical indicator system for lodging resistance.Cluster analysis identified 12 elite wheat lines combining strong stems and high yield,all of which surpassed the strong-stem parent Luomai 163 in second internode strength.Microstructural analysis further confirmed that their superior bending resistance was closely associated with the thickness of mechanical tissues in the internode.[Conclusion]The 12 selected strong-stem,high-yield germplasm lines provide high-quality parental resources for wheat lodging resistance breeding.Stem key mechanical indicators for evaluating wheat lodging resistance are clarified,and internode mechanical tissue thickness is verified as an important morphological feature influencing stem bending strength.关键词
小麦/重组自交系/强秆育种/茎秆强度/力学指标/种质筛选Key words
Wheat/Recombinant inbred lines/Strong-stem breeding/Stem strength/Mechanical indicators/Germplasm screening分类
农业科技引用本文复制引用
苏启航,卢雯瑩,孙少光,贺洁,苏亚蕊..小麦重组自交系群体抗倒伏相关性状遗传变异分析及强秆高产种质筛选[J].北方农业学报,2025,53(4):1-10,10.基金项目
河南省科技攻关项目(232102110158) （232102110158）
河南大学大学生创新创业训练计划项目(202110475068) （202110475068）
开封市科技发展计划项目(2202005) （2202005）
