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OA

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.