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Título : Quantitative trait loci for agronomic traits in an elite barley population for Mediterranean conditions
Autor : Mansour, Elsayed ; Casas Cendoya, Ana María ; Gracia Gimeno, María Pilar ; Molina-Cano, José Luis; Moralejo, María Ángeles; Cattivelli, Luigi; Thomas, William T. B.; Igartua Arregui, Ernesto
Palabras clave : Barley
Breeding
QTL
Agronomic adaptation
Vernalisation
VrnH1
Fecha de publicación : 1-feb-2014
Editor: Springer
Citación : Mansour E, Casas AM, Gracia MP, Molina-Cano JL, Moralejo M, Cattivelli L, Thomas WTB, Igartua E. Quantitative trait loci for agronomic traits in an elite barley population for Mediterranean conditions. Molecular Breeding 33 (2): 249-265 (2014)
Resumen: Advances in plant breeding through marker-assisted selection (MAS) are only possible when genes or quantitative trait loci (QTLs) can contribute to the improvement of elite germplasm. A population of recombinant inbred lines (RILs) was developed for one of the best crosses of the Spanish National Barley Breeding Program, between two six-row winter barley cultivars Orria and Plaisant. The objective of this study was to identify favourable QTLs for agronomic traits in this population, which may help to optimise breeding strategies for these and other elite materials for the Mediterranean region. A genetic linkage map was developed for 217 RILs, using 382 single nucleotide polymorphism markers, selected from the barley oligonucleotide pool assay BOPA1 and two genes. A subset of 112 RILs was evaluated for several agronomic traits over a period of 2 years at three locations, Lleida and Zaragoza (Spain) and Fiorenzuola d’Arda (Italy), for a total of five field trials. An important segregation distortion occurred during population development in the region surrounding the VrnH1 locus. A QTL for grain yield and length of growth cycle was also found at this locus, apparently linked to a differential response of the VrnH1 alleles to temperature. A total of 33 QTLs was detected, most of them for important breeding targets such as plant height and thousand-grain weight. QTL × environment interactions were prevalent for most of the QTLs detected, although most interactions were of a quantitative nature. Therefore, QTLs suitable for MAS for most traits were identified.
Descripción : 31 Pags., 4 Tabls., 1 Fig. Available online 15 September 2013. The definitive version is available at: http://link.springer.com/journal/11032
Versión del editor: http://dx.doi.org/10.1007/s11032-013-9946-5
URI : http://hdl.handle.net/10261/82472
DOI: 10.1007/s11032-013-9946-5
ISSN: 1380-3743
E-ISSN: 1572-9788
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