甘蔗71个杂交组合的配合力分析与优质亲本筛选OA
Combining Ability Analysis of 71 Sugarcane Hybrid Combinations and the Screening of Key Parental Lines
甘蔗(Saccharum spp.)是全球最主要的糖料作物,承担着约 80%的世界食糖生产任务.为满足现代糖业对高产高糖甘蔗品种的迫切需求,本研究以 71 个甘蔗杂交组合的实生苗为材料,开展了株高、茎径、锤度、有效茎、蔗产量和糖产量 6 个农艺性状的遗传变异分析,并应用R软件对一般配合力(GCA)和特殊配合力(SCA)进行估算,同时基于蔗产量和锤度 GCA与SCA进行聚类分析.结果表明:各组合在 6 个性状上均表现出丰富的遗传多样性,尤其在产量相关性状(有效茎、蔗产量和糖产量)上变异系数超过 39.00%,展现出较大的选育潜力,糖分性状锤度的变异系数最低(8.05%),说明其受遗传控制较强,稳定性较高.筛选出优良父本HoCP05-902、桂糖 96-211、粤糖 93-124、粤糖 93-159、桂糖 00-122 及云瑞 05-704,优良母本包括桂糖 94-119、CP72-1210 和Eros等;组合CP72-1210×桂糖 96-211与桂糖 94-119×粤糖 93-159 在 6 个性状上均表现优异,兼具高产与高糖特性,是育种应用的核心组合.GCA/SCA比值分析指出,蔗产量的加性遗传效应主要由父本主导.本研究筛选出一批优质亲本和优势组合,为甘蔗高产高糖育种提供理论基础和实践路径,具有重要的应用前景.
Sugarcane(Saccharum spp.)is the most significant global sugar crop,contributing approximately 80%of total sugar production worldwide.Developing high-yielding and high-sugar-content varieties is critical for enhancing sugar industry sustainability.To support this goal and optimize hybrid breeding strategies,this study evaluated 71 sug-arcane hybrid combinations derived from 75 parental lines,using six key agronomic traits:plant height,stalk diameter,brix(juice sugar content),number of effective stalks,cane yield and sugar yield.The main objective was to assess gen-eral combining ability(GCA)and specific combining ability(SCA),to identify superior parental lines and hybrid com-binations for sugarcane breeding programs.The GCA/SCA analyses were performed using the R software.Clustering analyses were conducted based on combining ability values to classify parental materials and hybrid combinations into distinct genetic performance groups.Results showed substantial genetic variation across hybrids,particularly in yield-related traits,with coefficients of variation exceeding 39.00%for effective stalks,cane yield and sugar yield,highlighting significant breeding potential.Conversely,brix exhibited the lowest variation(8.05%),indicating high ge-netic stability for sugar content traits.Notably,HoCP05-902,GT96-211,YT93-124,YT93-159,GT00-122 and YR05-704 were identified as elite male parents,while GT94-119,CP72-1210 and Eros were outstanding female lines.Two combinations,CP72-1210×GT96-211 and GT94-119×YT93-159,exhibited superior GCA and SCA values,achiev-ing excellent performance in both yield and sugar content.Additionally,GCA/SCA ratio analysis revealed that cane yield exhibited significant additive effects primarily inherited from the male parent.In conclusion,this research pro-vides valuable theoretical guidance and genetic resources for sugarcane breeding,highlighting key parental lines and hybrid combinations that can serve as core materials in developing next-generation high-yield,high-sugar sugarcane cultivars.
唐思琪;刘家勇;赵培方;昝逢刚;姚丽;赵丽萍
热带作物生物育种全国重点实验室,云南 昆明 650205||云南省农业科学院甘蔗研究所/云南甘蔗遗传改良重点实验室,云南开远 661699热带作物生物育种全国重点实验室,云南 昆明 650205||云南省农业科学院甘蔗研究所/云南甘蔗遗传改良重点实验室,云南开远 661699热带作物生物育种全国重点实验室,云南 昆明 650205||云南省农业科学院甘蔗研究所/云南甘蔗遗传改良重点实验室,云南开远 661699热带作物生物育种全国重点实验室,云南 昆明 650205||云南省农业科学院甘蔗研究所/云南甘蔗遗传改良重点实验室,云南开远 661699热带作物生物育种全国重点实验室,云南 昆明 650205||云南省农业科学院甘蔗研究所/云南甘蔗遗传改良重点实验室,云南开远 661699热带作物生物育种全国重点实验室,云南 昆明 650205||云南省农业科学院甘蔗研究所/云南甘蔗遗传改良重点实验室,云南开远 661699
农业科技
甘蔗杂交组合配合力聚类分析
sugarcanehybrid combinationscombining abilitycluster analysis
《热带作物学报》 2026 (1)
67-75,9
国家重点研发计划项目(No.2022YFD2301100)广西科技重大专项(桂科AA23073001)云南省科技计划项目(No.202404BP090025).
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