QTL analysis of main and epistatic effects for flour color traits in durum wheat

Authors
Roncallo, Pablo F.; Cervigni, Gerardo Domingo Lucio; Jensen, Carlos Alberto; Miranda, Rubén; Carrera, Alicia Delia; Helguera, Marcelo; Echenique, Carmen Viviana
Publication Year
2012
Language
English
Format
article
Status
Versión aceptada para publicación
Description
The aim of this work was to map quantitative trait loci (QTLs) associated with flour yellow color (Fb*) and yellow pigment content (YPC) in durum wheat (Triticum turgidum L. var. durum). Additionally, QTLs affecting flour redness (Fa*) and brightness (FL*) color parameters were investigated. A population of 93 RILs (UC1113 × Kofa) was evaluated in three locations of Argentina over 2 years. High heritability values (>94%) were obtained for Fb* and YPC, whereas FL* and Fa* showed intermediate to high values. The main QTLs affecting Fb* and YPC overlapped on chromosome arms 4AL (4AL.2), 6AL (6AL.2), 7AS, 7AL, 7BS (7BS.2) and 7BL (7BL.2). The 7BL.1 QTL included the Psy-B1 locus, but one additional linked QTL was detected. A novel minor QTL located on 7AS affected Fb*, with an epistatic effect on YPC. An epistatic interaction occurred between the 7AL and 7BL.2 QTLs. The 4AL.2 QTL showed a strong effect on Fb* and was involved in two digenic epistatic interactions. The 6AL.2 QTL explained most of the variation for Fb* and YPC. The main QTLs affecting FL* and Fa* were located on 2BS and 7BL, respectively. These results confirm the complex inheritance of flour color traits and open the possibility of developing perfect markers to improve pasta quality in Argentinean breeding programs
Fil: Roncallo, Pablo F. CERZOS-Consejo Nacional de Investigaciones Científicas y Técnicas/UNS. CCT. Laboratorio de Biotecnología Vegetal; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
Fil: Cervigni, Gerardo. CEFOBI-Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Jensen, Carlos Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Barrow; Argentina
Fil: Miranda, Rubén. Asociación de Cooperativas Argentinas; Argentina
Fil: Carrera, Alicia Delia. CERZOS-Consejo Nacional de Investigaciones Científicas y Técnicas/UNS. CCT. Laboratorio de Biotecnología Vegetal; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
Fil: Helguera, Marcelo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Marcos Juárez; Argentina
Fil: Echenique, Carmen Viviana. CERZOS-Consejo Nacional de Investigaciones Científicas y Técnicas/UNS. CCT. Laboratorio de Biotecnología Vegetal; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
Source
Euphytica 185 (1) : 77–92 (May 2012)
Subject
Trigo Duro
Triticum Durum
Loci de Rasgos Cuantitativos
Hard Wheat
Quantitative Trait Loci
Flours
Harinas
QTL
Access level
Open access
License
Repository
INTA Digital (INTA)
Institution
Instituto Nacional de Tecnología Agropecuaria
OAI Identifier
oai:localhost:20.500.12123/1704