A high-density genetic map and QTL mapping on growth and latex yield-related traits in Hevea brasiliensis Mull.Arg
文献类型： 外文期刊
作者： An, Zewei 1 ; Zhao, Yanhong 2 ; Zhang, Xiaofei 1 ; Huang, Xiao 1 ; Hu, Yanshi 1 ; Cheng, Han 1 ; Li, Xiaolong 3 ; Huang, 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, State Ctr Rubber Breeding, Rubber Res Inst, Danzhou 571737, Hainan, Peoples R China
2.Ludong Univ, Sch Agr, Yantai 264025, Shandong, Peoples R China
3.Biomarker Technol Corp, Beijing 101300, Peoples R China
关键词： Hevea brasiliensis; Quantitative trait loci; Genetic map; SNP marker; Dynamic mapping; Marker-assisted selection
期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：5.645； 五年影响因子：5.749 ）
ISSN： 0926-6690
年卷期： 2019 年 132 卷
页码：
收录情况： SCI
摘要： Hevea brasiliensis Mull.Arg., the rubber tree, is an important industrial crop, which is the major source of nature rubber. Recently, Simple Sequence Repeat (SSR)- and Single Nucleotide Polymorphism (SNP)-based genetic maps have been reported, however further trait-related markers are needed for efficient molecular breeding in rubber tree. In this study, a total of 206 F-1 progeny derived from a cross of CATAS 8-79 x MT/C/11 9/67 were sequenced and genotyped by specific-locus amplified fragment sequencing (SLAF-seq) technology. Based on 268,592 SNPs obtained from SLAF-seq, a high-density genetic map with 4,543 SNPs was constructed, covering 2,670.27 cM of the whole rubber tree genome. This map has an average marker distance of 0.59 cM. Based on the high-density genetic map, dynamic quantitative trait loci (QTL) analysis of latex yield and stem growth was carried out by conditional and unconditional QTL mapping. To our knowledge, it is the first time to perform conditional QTL mapping of rubber tree for exploring QTLs expressed selectively at different growth stages. In total, eleven QTLs for stem growth and 12 QTLs for latex yield, distributing in 15 linkage groups (LGs), were detected, explaining 3.1%-18.4% of the phenotypic variance. Two QTLs, qSG-8-2 for stem growth and qLD-8-3 for latex yield, were mapped within the same marker interval of LG 8 with a genetic distance of 3.0 cM. Herein the high-density genetic map and trait-related QTLs in rubber tree were reported, which will facilitate the genetic research of rubber tree and enhance rubber tree molecular breeding.
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