The genetic dissection of quantitative traits in crops

Most traits of interest in plant breeding show quantitative inheritance, which complicate the breeding process since phenotypic performances only partially reflects the genetic values of individuals. The genetic variation of a quantitative trait is assumed to be controlled by the collective effects...

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Autores principales:	Semagn,Kassa, Bjørnstad,Åsmund, Xu,Yunbi
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso 2010
Materias:	association mapping linkage disequilibrium markers assisted selection molecular breeding molecular markers quantitative trait QTL mapping QTL analysis
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500016
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spelling	oai:scielo:S0717-345820100005000162011-05-24The genetic dissection of quantitative traits in cropsSemagn,KassaBjørnstad,ÅsmundXu,Yunbi association mapping linkage disequilibrium markers assisted selection molecular breeding molecular markers quantitative trait QTL mapping QTL analysis Most traits of interest in plant breeding show quantitative inheritance, which complicate the breeding process since phenotypic performances only partially reflects the genetic values of individuals. The genetic variation of a quantitative trait is assumed to be controlled by the collective effects of quantitative trait loci (QTLs), epistasis (interaction between QTLs), the environment, and interaction between QTL and environment. Exploiting molecular markers in breeding involve finding a subset of markers associated with one or more QTLs that regulate the expression of complex traits. Many QTL mapping studies conducted in the last two decades identified QTLs that generally explained a significant proportion of the phenotypic variance, and therefore, gave rise to an optimistic assessment of the prospects of markers assisted selection. Linkage analysis and association mapping are the two most commonly used methods for QTL mapping. This review provides an overview of the two QTL mapping methods, including mapping population type and size, phenotypic evaluation of the population, molecular profiling of either the entire or a subset of the population, marker-trait association analysis using different statistical methods and software as well as the future prospects of using markers in crop improvement.info:eu-repo/semantics/openAccessPontificia Universidad Católica de ValparaísoElectronic Journal of Biotechnology v.13 n.5 20102010-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500016en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	association mapping linkage disequilibrium markers assisted selection molecular breeding molecular markers quantitative trait QTL mapping QTL analysis
spellingShingle	association mapping linkage disequilibrium markers assisted selection molecular breeding molecular markers quantitative trait QTL mapping QTL analysis Semagn,Kassa Bjørnstad,Åsmund Xu,Yunbi The genetic dissection of quantitative traits in crops
description	Most traits of interest in plant breeding show quantitative inheritance, which complicate the breeding process since phenotypic performances only partially reflects the genetic values of individuals. The genetic variation of a quantitative trait is assumed to be controlled by the collective effects of quantitative trait loci (QTLs), epistasis (interaction between QTLs), the environment, and interaction between QTL and environment. Exploiting molecular markers in breeding involve finding a subset of markers associated with one or more QTLs that regulate the expression of complex traits. Many QTL mapping studies conducted in the last two decades identified QTLs that generally explained a significant proportion of the phenotypic variance, and therefore, gave rise to an optimistic assessment of the prospects of markers assisted selection. Linkage analysis and association mapping are the two most commonly used methods for QTL mapping. This review provides an overview of the two QTL mapping methods, including mapping population type and size, phenotypic evaluation of the population, molecular profiling of either the entire or a subset of the population, marker-trait association analysis using different statistical methods and software as well as the future prospects of using markers in crop improvement.
author	Semagn,Kassa Bjørnstad,Åsmund Xu,Yunbi
author_facet	Semagn,Kassa Bjørnstad,Åsmund Xu,Yunbi
author_sort	Semagn,Kassa
title	The genetic dissection of quantitative traits in crops
title_short	The genetic dissection of quantitative traits in crops
title_full	The genetic dissection of quantitative traits in crops
title_fullStr	The genetic dissection of quantitative traits in crops
title_full_unstemmed	The genetic dissection of quantitative traits in crops
title_sort	genetic dissection of quantitative traits in crops
publisher	Pontificia Universidad Católica de Valparaíso
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500016
work_keys_str_mv	AT semagnkassa thegeneticdissectionofquantitativetraitsincrops AT bjørnstadasmund thegeneticdissectionofquantitativetraitsincrops AT xuyunbi thegeneticdissectionofquantitativetraitsincrops AT semagnkassa geneticdissectionofquantitativetraitsincrops AT bjørnstadasmund geneticdissectionofquantitativetraitsincrops AT xuyunbi geneticdissectionofquantitativetraitsincrops
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The genetic dissection of quantitative traits in crops

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