西北农业学报2026，Vol.35Issue(4)：651-661,11.DOI:10.7606/j.issn.1004-1389.2026.04.005
青海省高原小麦种质资源品质性状遗传多样性分析及综合评价
Genetic Diversity Analysis and Comprehensive Evaluation of Quality Traits in Highland Wheat Germplasm Resources from Qinghai Province,China
摘要
Abstract
The quality of wheat grains directly determines their processing quality and end-use per-formance.In-depth investigation and dissection of the genetic diversity of grain quality traits in wheat germplasm can provide superior genetic materials and gene resources for wheat quality breeding.This study employed 200 wheat accessions collected from Qinghai Province and other origins.Six grain quality traits were measured in wheat materials cultivated in four distinct ecological environments:crude protein content,soluble protein content,wet gluten content,sedimentation value,stability time,and development time.Best linear unbiased prediction(BLUP)values were computed to eliminate en-vironmental variance,followed by genetic diversity analysis and comprehensive evaluation.The results indicated that except for soluble protein content in the guide ecological region of Qinghai,all other traits exhibited genetic diversity indices greater than 2 across different environments;all quality traits followed normal or skewed distributions,with peak frequencies varying across environments;signifi-cant positive correlations were observed among all quality traits;The genotype-by-environment inter-action analysis revealed that environmental effects accounted for the largest proportion of phenotypic variation;K-means clustering analysis classified the tested germplasm into three groups:Group Ⅰ con-tained predominantly strong-gluten wheat,Group Ⅱ mainly medium-strong gluten wheat,and GroupⅢ primarily medium-and weak-gluten wheat;Based on principal component analysis and membership function analysis,five wheat germplasm accessions with excellent quality traits were selected.These selected materials will serve as excellent genetic resources and foundational breeding materials for fu-ture breeding of high-quality wheat varieties.关键词
小麦/品质性状/遗传多样性/聚类分析/综合评价Key words
Wheat/Quality traits/Genetic diversity/Cluster analysis/Comprehensive evaluation引用本文复制引用
尚俊秀,刁玉虹,姚晓华,丁宝军,李新,崔永梅,刘国栋,苏胜春,姚有华..青海省高原小麦种质资源品质性状遗传多样性分析及综合评价[J].西北农业学报,2026,35(4):651-661,11.基金项目
青海省种业创新攻关"揭榜挂帅"项目"小麦种质创新利用及品种选育". Qinghai Provincial Seed Industry Innovation and Tackling("Unveiling the List of Commanders"):Wheat Germplasm Innovation and Utilization and Variety Selection and Breeding. （"Unveiling the List of Commanders"）
