麦薲草种子产量相关性状评价及高产种质筛选OA

This study focused on eight Elymus tangutorum germplasm accessions from the Qinghai-Xizang Plateau.The associations and genetic variation among seed yield,shattering,and key agronomic traits were sys-tematically evaluated through a comprehensive approach combining one-way ANOVA,correlation analysis,PCA,RDA,and rank-sum ratio analysis.Results showed that natural shattering rates in E.tangutorum germ -plasm exhibit wide variation(43.11%-64.96%)and complex associations with seed yield.Seed yield showed sig-nificant positive correlations with spikelet length,lemma length,and lemma width,while exhibiting highly signifi-cant negative correlations with inflorescence node number.Spikelet length,spikelet width,and lemma length were identified as key traits influencing yield.The study further clarified that reducing shattering while synergisti-cally increasing spikelet length,spikelet width,lemma width,and thousand-seed weight represents a crucial path-way to achieving high yields.Comprehensive evaluation using rank-sum ratios revealed that accession 18-096 exhibited the highest RSR fitted value(0.74),demonstrating significant advantages in seed yield,low shattering tendency,and agronomic traits,making it the most promising germplasm with high yield potential.