中国草地学报2025，Vol.47Issue(10)：11-21,11.DOI:10.16742/j.zgcdxb.20250060
不同区域100份羊草种质结实性状的综合评价
Comprehensive Evaluation of Seed Setting Traits in 100 Leymus chinensis Germplasms from Different Regions
摘要
Abstract
Leymus chinensis is an important native forage grass species in China,yet its low seed setting rate greatly constrains large-scale production and utilization.To identify the key traits influencing seed setting and to evaluate their relative contributions,this study examined 100 Leymus chinensis germplasms collected from different geographic origins.Fifteen traits closely related to seed setting were measured,including seed number,spike weight,seed weight,floret number,spikelet number,spike length,number of spike knots,vegetative plant height,reproductive plant height,leaf length,leaf width,seed setting percentage,thousand seed weight,and the number of vegetative and reproductive branches.The results showed that there was substantial genetic variation among the germplasms,with coefficients of variation for the 15 traits ranging from 10.88%to 56.05%.Correlation analysis showed that spike weight,seed number,seed weight,and thousand seed weight were significantly and positively correlated with seed setting rate,indicating their central roles in reproductive success.Multiple regression and hierarchical partitioning analyses demonstrated that seed number had the greatest contribution to seed setting rate,accounting for 31.57%of variation.Principal component analysis indicated that the first five principal components collectively explained 78.126%of the total variance.Based on a comprehensive evaluation of these traits,ten germplasms(77,23,24,37,35,20,57,10,22,7)were identified as superior germplasms with high reproductive potential and stable performance across multiple traits.关键词
羊草/种质筛选/评价/遗传多样性/结实性状Key words
Leymus chinensis/Germplasm screening/Evaluation/Genetic diversity/Seed setting traits分类
农业科技引用本文复制引用
王介繁,董笛,张然,刘岳含,张连文,赵志涵,石凤翎,李晓霞..不同区域100份羊草种质结实性状的综合评价[J].中国草地学报,2025,47(10):11-21,11.基金项目
中国林业科学研究院基本科研业务费专项资金(CAFYBB2022XA002,CAFYBB2024QF038) （CAFYBB2022XA002,CAFYBB2024QF038）
