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穆帅成, 祝绪礼, 叶梅霞, 邬荣领. 多维功能作图在胡杨幼苗生长QTL的应用[J]. 植物科学学报, 2022, 40(3): 365-377. DOI: 10.11913/PSJ.2095-0837.2022.30365
引用本文: 穆帅成, 祝绪礼, 叶梅霞, 邬荣领. 多维功能作图在胡杨幼苗生长QTL的应用[J]. 植物科学学报, 2022, 40(3): 365-377. DOI: 10.11913/PSJ.2095-0837.2022.30365
Mu Shuai-Cheng, Zhu Xu-Li, Ye Mei-Xia, Wu Rong-Ling. Application of multi-trait functional mapping of QTL in Populus euphratica Oliv. seedlings[J]. Plant Science Journal, 2022, 40(3): 365-377. DOI: 10.11913/PSJ.2095-0837.2022.30365
Citation: Mu Shuai-Cheng, Zhu Xu-Li, Ye Mei-Xia, Wu Rong-Ling. Application of multi-trait functional mapping of QTL in Populus euphratica Oliv. seedlings[J]. Plant Science Journal, 2022, 40(3): 365-377. DOI: 10.11913/PSJ.2095-0837.2022.30365

多维功能作图在胡杨幼苗生长QTL的应用

Application of multi-trait functional mapping of QTL in Populus euphratica Oliv. seedlings

  • 摘要: 功能作图框架能够表征复杂动态性状背后的数量性状位点(Quantitative trait locus, QTL)或核苷酸。此前,功能作图广泛应用于单个性状或两个性状的QTL定位当中,多个相关性状功能作图的研究相对匮乏。本研究通过对SAD(Structured antedependence)模型进一步推导,得到在多个性状时用于拟合时间相关协方差矩阵的结构化模型,并使用胡杨(Populus euphratica Oliv.)340个F1代群体的4个生长相关性状以及模拟实验对多维功能作图模型进行测试。结果显示,共定位出173个显著位点,分布于除4、9、10、15、16以外的染色体。功能注释涉及参与叶绿体早期发育、生长素横向运输、提高植物非生物胁迫耐受性以及作为跨膜运输系统开关等生物学过程的32个基因。

     

    Abstract: Functional mapping frameworks can characterize quantitative trait loci (QTL) or nucleotides underlying complex dynamic traits. Functional mapping has been widely used in QTL mapping of a single trait or two traits, but research on multiple correlated traits remains relatively scarce. In this study, the structured antedependence (SAD) model was further derived and used to fit time-dependent covariance matrices for multiple traits. Four growth related traits of 340 Populus euphratica Oliv. F1 populations as well as simulation experiments were used to test this multi-trait functional mapping model. In total, 173 significant loci were located on the chromosomes, except for 4, 9, 10, 15, and 16. Functional annotation identified 32 genes involved in early chloroplast development, lateral auxin transport, abiotic stress tolerance, and transmembrane transport system switching.

     

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