中国农学通报2025，Vol.41Issue(27)：11-20,10.
青海高原小麦杂交后代群体中农艺和种子性状的遗传变异分析
Alien-Derived Progeny Populations of Wheat from Qinghai Plateau:Genetic Variation Analysis of Agronomic and Seed Traits
摘要
Abstract
To improve disease resistance and yield of spring wheat in the Qinghai Plateau,an F4 population was constructed using the elite local cultivar'Gaoyuan 448'as the female parent and the CIMMYT disease-resistant germplasm'Mucuy'as the male parent.Systematic analysis of 145 families revealed abundant variation in agronomic traits,with coefficients of variation for plant height,tiller number,spike length,spikelet number per spike,and grain number per spike being 11.67%,54.09%,14.74%,11.58%,and 27.14%,respectively;among grain traits,grain area and perimeter showed variations of 24.54%and 9.39%.Correlation analysis indicated highly significant positive correlations(P<0.01)between grain number per spike and grain size traits(area r=0.55,perimeter r=0.57)as well as spikelet number(r=0.37).Principal component analysis extracted four principal components(cumulative contribution rate 83.117%),with grain morphology indicators contributing 46.824%.Based on comprehensive membership function values,25 elite lines(comprehensive index>5.0)were selected,combining field evaluation for adult-plant resistance to stripe rust,seven lines were developed that integrate the high-yield spike architecture of'Gaoyuan 448'(with>16 spikelets per spike and>44 grains per spike)and the disease resistance characteristics of'Mucuy'.This study provides novel germplasm resources and theoretical support for breeding disease-resistant and high-yielding wheat cultivars in Qinghai.关键词
青海高原小麦/CIMMYT春小麦/高原448/农艺性状/籽粒性状/遗传变异/优良家系筛选/综合权重分析Key words
Qinghai Plateau wheat/CIMMYT spring wheat/'Gaoyuan 448'/agronomic traits/grain traits/genetic variation/superior line selection/comprehensive trait weighting analysis分类
农业科技引用本文复制引用
刘树凤,沈吉成,杨有来,刘瑞娟,陈文杰,刘德梅..青海高原小麦杂交后代群体中农艺和种子性状的遗传变异分析[J].中国农学通报,2025,41(27):11-20,10.基金项目
青海省应用基础研究项目"青海高原春小麦条锈病成株抗性基因的聚合分析"(2022-ZJ-737). （2022-ZJ-737）
