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首页> 外文期刊>Genomics >Genome-wide association mapping of latex yield and girth in Amazonian accessions of Hevea brasiliensis grown in a suboptimal climate zone
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Genome-wide association mapping of latex yield and girth in Amazonian accessions of Hevea brasiliensis grown in a suboptimal climate zone

机译：次优气候区生长的巴西橡胶树亚马逊种质乳胶产量和周长的全基因组关联图谱

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摘要

Latex yield and growth are the key complex traits in commercial rubber production. The present study is the first to report genome-wide association mapping of latex yield and girth, for 170 Amazonian accessions grown in a suboptimal area characterized by limited rainfall and a lengthy dry season. Targeted sequence enrichment to capture gene transcripts generated 14,155 high quality filtered single nucleotide polymorphisms (SNPs) of which 94.3% resided in coding regions. The rapid decay of linkage disequilibrium over physical and genetic distance found in the accessions was comparable to those previously reported for several outcrossing species. A mixed linear model detected three significant SNPs in three candidate genes involved in plant adaptation to drought stress, individually explaining 12.7–15.7% of the phenotypic variance. The SNPs identified in the study will help to extend understanding, and to support genetic improvement of rubber trees grown in drought-affected regions.
机译：乳胶的产量和增长是商业橡胶生产中的关键复杂特征。本研究是第一个报告全乳胶产量和周长的全基因组关联图，针对170个亚马逊种质，其生长在次优区域，其特征是降雨有限且干旱季节漫长。靶向序列富集以捕获基因转录物产生了14,155个高质量的经过滤的单核苷酸多态性（SNP），其中94.3％位于编码区。在种质中发现的连锁不平衡在物理和遗传距离上的快速衰减与先前报道的几种异交物种的相当。混合线性模型在参与植物适应干旱胁迫的三个候选基因中检测到三个重要的SNP，分别解释了表型变异的12.7–15.7％。研究中确定的SNP将有助于扩大了解，并支持干旱地区橡胶树的遗传改良。

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