植物遗传资源学报2025，Vol.26Issue(5)：878-890,13.DOI:10.13430/j.cnki.jpgr.20240914001
366份长绒陆地棉种质资源表型多样性分析
Phenotypic Diversity Analysis of 366 Germplasm Resources of Long Staple Upland Cotton
摘要
Abstract
This study employed a genetic model incorporating genotype and genotype-by-environment interactions to evaluate the genetic diversity of 366 long staple upland cotton germplasm resources across two growing seasons.The analysis focused on five fiber quality traits and five yield traits.We assessed phenotypic genetic diversity using correlation analysis,cluster analysis,principal component analysis,and multiple linear regression analysis to determine the potential applications of each germplasm type.The results indicated that the coefficient of variation for fiber quality traits ranged from 1.34％to 11.80％,while for yield traits it ranged from 7.95％to 54.09％.The genetic diversity index for fiber quality traits ranged from 1.55 to 2.03(average=1.879),and for yield traits from 1.42 to 1.99(average=1.782).These findings highlight significant differences among the 366 germplasm resources and their diverse genetic backgrounds.Cluster analysis classified their germplasm resources into five distinct groups:Group Ⅰ(63 germplasms)exhibited high boll weight,high lint index,and good uniformity;Group Ⅱ(41 germplasms)had high lint percentage,high boll number per plant,and high lint yield per plant(representing high-yielding materials);Group Ⅲ(71 germplasms)had short lint length and low boll weight;Group Ⅳ(84 germplasms)had longer lint length,lower micronaire value,and higher breaking tenacity;Group Ⅴ(107 germplasms)had the longest lint length,lowest micronaire value,and highest breaking tenacity(high-quality materials).Based on the comprehensive score(F-value),18 superior germplasms were identified,including nine with a score higher than the control variety"Jinggang"(0.87),four with scores between"Jinggang"(0.87)and"Zhongmian-3"(0.80),and five between"Zhongmian-3"(0.80)and"Xinluzhong-87"(0.74).Furthermore,we developed multiple linear regression models to predict lint length and lint yield per plant.This study contributes significantly to germplasm innovation and genetic breeding in upland cotton,with the identified superior germplasms serving as exceptional parental materials for enhancing local cotton fiber quality and yield potential.关键词
长绒陆地棉/种质资源筛选/遗传多样性分析/综合评价Key words
long staple upland cotton/germplasm screening/genetic diversity analysis/comprehensive evaluation引用本文复制引用
董占鹏,汪赛月,李珂鑫,关永虎,李长喜,梅拥军..366份长绒陆地棉种质资源表型多样性分析[J].植物遗传资源学报,2025,26(5):878-890,13.基金项目
国家自然科学基金(31560408)National Natural Science Foundation of China(31560408) （31560408）
