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A dissection model for mapping complex traits.

Identifieur interne : 000B70 ( Main/Exploration ); précédent : 000B69; suivant : 000B71

A dissection model for mapping complex traits.

Auteurs : Mengmeng Sang [République populaire de Chine] ; Hexin Shi [République populaire de Chine] ; Kun Wei [République populaire de Chine] ; Meixia Ye [République populaire de Chine] ; Libo Jiang [République populaire de Chine] ; Lidan Sun [République populaire de Chine] ; Rongling Wu [République populaire de Chine, États-Unis]

Source :

RBID : pubmed:30536697

Descripteurs français

English descriptors

Abstract

Many quantitative traits are composites of other traits that contribute differentially to genetic variation. Quantitative trait locus (QTL) mapping of these composite traits can benefit by incorporating the mechanistic process of how their formation is mediated by the underlying components. We propose a dissection model by which to map these interconnected components traits under a joint likelihood setting. The model can test how a composite trait is determined by pleiotropic QTLs for its component traits or jointly by different sets of QTLs each responsible for a different component. The model can visualize the pattern of time-varying genetic effects for individual components and their impacts on composite traits. The dissection model was used to map two composite traits, stemwood volume growth decomposed into its stem height, stem diameter and stem form components for Euramerican poplar adult trees, and total lateral root length constituted by its average lateral root length and lateral root number components for Euphrates poplar seedlings. We found the pattern of how QTLs for different components contribute to phenotypic variation in composite traits. The detailed understanding of the genetic machineries of composite traits will not only help in the design of molecular breeding in plants and animals, but also shed light on the evolutionary processes of quantitative traits under natural selection.

DOI: 10.1111/tpj.14185
PubMed: 30536697


Affiliations:


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Le document en format XML

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<term>Plant Stems (genetics)</term>
<term>Populus (genetics)</term>
<term>Quantitative Trait Loci (genetics)</term>
<term>Seedlings (genetics)</term>
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<term>Hérédité multifactorielle (MeSH)</term>
<term>Locus de caractère quantitatif (génétique)</term>
<term>Phénotype (MeSH)</term>
<term>Plant (génétique)</term>
<term>Populus (génétique)</term>
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<div type="abstract" xml:lang="en">Many quantitative traits are composites of other traits that contribute differentially to genetic variation. Quantitative trait locus (QTL) mapping of these composite traits can benefit by incorporating the mechanistic process of how their formation is mediated by the underlying components. We propose a dissection model by which to map these interconnected components traits under a joint likelihood setting. The model can test how a composite trait is determined by pleiotropic QTLs for its component traits or jointly by different sets of QTLs each responsible for a different component. The model can visualize the pattern of time-varying genetic effects for individual components and their impacts on composite traits. The dissection model was used to map two composite traits, stemwood volume growth decomposed into its stem height, stem diameter and stem form components for Euramerican poplar adult trees, and total lateral root length constituted by its average lateral root length and lateral root number components for Euphrates poplar seedlings. We found the pattern of how QTLs for different components contribute to phenotypic variation in composite traits. The detailed understanding of the genetic machineries of composite traits will not only help in the design of molecular breeding in plants and animals, but also shed light on the evolutionary processes of quantitative traits under natural selection.</div>
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<AbstractText>Many quantitative traits are composites of other traits that contribute differentially to genetic variation. Quantitative trait locus (QTL) mapping of these composite traits can benefit by incorporating the mechanistic process of how their formation is mediated by the underlying components. We propose a dissection model by which to map these interconnected components traits under a joint likelihood setting. The model can test how a composite trait is determined by pleiotropic QTLs for its component traits or jointly by different sets of QTLs each responsible for a different component. The model can visualize the pattern of time-varying genetic effects for individual components and their impacts on composite traits. The dissection model was used to map two composite traits, stemwood volume growth decomposed into its stem height, stem diameter and stem form components for Euramerican poplar adult trees, and total lateral root length constituted by its average lateral root length and lateral root number components for Euphrates poplar seedlings. We found the pattern of how QTLs for different components contribute to phenotypic variation in composite traits. The detailed understanding of the genetic machineries of composite traits will not only help in the design of molecular breeding in plants and animals, but also shed light on the evolutionary processes of quantitative traits under natural selection.</AbstractText>
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<Affiliation>Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, 100083, China.</Affiliation>
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<AffiliationInfo>
<Affiliation>Center for Computational Biology, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China.</Affiliation>
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<AffiliationInfo>
<Affiliation>State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing, 100091, China.</Affiliation>
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<AffiliationInfo>
<Affiliation>Center for Statistical Genetics, Departments of Public Health Sciences and Statistics, Pennsylvania State University, Hershey, PA, 17033, USA.</Affiliation>
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<Country>England</Country>
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<Keyword MajorTopicYN="Y">QTL </Keyword>
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<li>États-Unis</li>
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