草业学报2025，Vol.34Issue(3)：85-96,12.DOI:10.11686/cyxb2024149
紫花苜蓿半同胞家系农艺性状的遗传变异分析
Analysis of genetic variation in agronomic of half-sib families of Medicago sativa
摘要
Abstract
Through the investigation of agronomic traits of 35 half-sibling families of Medicago sativa,the genetic variation of agronomic traits among families was analyzed,in order to make informed decisions on likely gain in the breeding of alfalfa varieties.It was found that there was very significant variation in traits among the different families.The coefficient of variation among different traits ranged from 5.24%-33.18% .Generalized heritability,family heritability and genetic progress were,respectively,0.05%-69.04%,1.07%-72.90% and 0-20.08.Plant height,stem diameter and branch number were significantly correlated with fresh herbage yield;the number of branches was significantly correlated with hay yield and seed yield;there was a significant correlation between different stubble measures,except for the ratio of fresh∶dry and the ratio of stem∶leaf.Using membership function multivariate analysis,four elite families,(designated FM22,FM7,FM15 and FM1),were identified,and the average genetic gains for plant height,stem diameter,branch number,fresh grass yield,hay yield,fresh-to-dry ratio,stem-leaf ratio and seed yield of the selected families were,respectively,3.78%,0.43%,10.21%,1.08%,4.82%,-0.16%,-0.27% and 9.36%,respectively.There was a large genetic variation among the traits of the 35 half-sibling families,and there was a large potential for improvement.The elite families initially identified provide a germplasm resource for ongoing breeding improvement of alfalfa.关键词
紫花苜蓿/半同胞家系/农艺性状/遗传变异/遗传增益Key words
alfalfa/half-sib progeny/agronomic traits/genetic variation/genetic gains引用本文复制引用
胡鹏飞,叶雨浓,王通锐,王晶,王星,伏兵哲,高雪芹..紫花苜蓿半同胞家系农艺性状的遗传变异分析[J].草业学报,2025,34(3):85-96,12.基金项目
宁夏农业育种专项和宁夏适生饲草新品种选育与良种繁育(2019NYYZ04)资助. （2019NYYZ04）
