植物遗传资源学报2026，Vol.27Issue(6)：1255-1265,11.DOI:10.13430/j.cnki.jpgr.20260203004
198份澳洲坚果种质花序表型遗传多样性分析
Analysis of Phenotypic Genetic Diversity of Inflorescence Traits in 198 Macadamia spp.Germplasm Accessions
摘要
Abstract
In this study,14 inflorescence phenotypic traits were measured in 198 Macadamia(Macadamia spp.)germplasm.Methods including genetic diversity index,correlation analysis,principal component analysis(PCA),and cluster analysis were employed to systematically evaluate the genetic diversity of inflorescence phenotypic traits and characterize the inflorescence performance of different germplasm groups.The results showed that the genetic diversity indices of four qualitative traits ranged from 0.063(peduncle color)to 1.438(the order of floret opening).For the ten quantitative traits,the genetic diversity indices ranged from 1.914 to 2.081;moreover,all quantitative traits except for corolla diameter and floret density were distributed across grades 1 to 10,indicating rich genetic diversity.Correlation analysis revealed significant or highly significant correlations between most quantitative traits,except for three specific pairs:pedicel length of floret and peduncle diameter,corolla diameter and peduncle stalk length,and floret density and peduncle diameter.Four principal components were extracted via PCA,with a cumulative contribution rate of 81.861％.Based on PCA scores,the germplasm were categorized into six clusters:long inflorescence-small floret type,few-large flower type,short inflorescence-small floret type,short inflorescence-large floret type,long-many floret type,and short-many floret type.Further comparison between Chinese provenances germplasms and Australian and Hawaiian provenances germplasms using orthogonal projections to latent structures discriminant analysis(OPLS-DA)revealed that corolla diameter was a common differential trait,indicating that Chinese macadamia germplasm have undergone certain phenotypic differentiation in inflorescence.This study provides a theoretical basis for the evaluation of macadamia germplasm resources and the selection and breeding of pollinator varieties.关键词
澳洲坚果/花序表型/遗传多样性/种质资源评价Key words
Macadamia/inflorescence phenotypic traits/genetic diversity/germplasm evaluation引用本文复制引用
李扬,罗勇,陶亮,何海宁,马静,宫丽丹,龙青姨,吴超,李婷玉,耿建建,字楠华,黄妮娅..198份澳洲坚果种质花序表型遗传多样性分析[J].植物遗传资源学报,2026,27(6):1255-1265,11.基金项目
云南省所热带作物科技创新专项资金(RF2026) （RF2026）
云南省科技人才与平台计划项目(202405AD350061) （202405AD350061）
中央财政林业科技推广示范项目(云[2024]TG35号) （云[2024]TG35号）
云南省2025年度产业创新人才专项支持项目(yfgrc202520)Yunnan Special Fund for Scientific and Technological Innovation of Tropical Crops(RF2026) （yfgrc202520）
Sci-Tech Talent and Platform Plan(202405AD350061) （202405AD350061）
Central Government Financial Forestry Science Technology Extension and Demonstration Project(Yun[2024]TG35) （Yun[2024]TG35）
Yunnan Province Industrial Innovation Talent Special Support Project(yfgrc202520) （yfgrc202520）
