CEFOBI   05405
CENTRO DE ESTUDIOS FOTOSINTETICOS Y BIOQUIMICOS
Unidad Ejecutora - UE
artículos
Título:
QTL analysis of main and epistatic effects for flour color traits in durum wheat.
Autor/es:
RONCALLO P; CERVIGNI G; JENSEN C; MIRANDA R; ALICIA CARRERA; VIVIANA ECHENIQUE
Revista:
EUPHYTICA
Editorial:
SPRINGER
Referencias:
Año: 2012 vol. 185 p. 77 - 92
ISSN:
0014-2336
Resumen:
The aim of this work was to map quantitativetrait loci (QTLs) associated with flour yellowcolor (Fb*) and yellow pigment content (YPC) indurum wheat (Triticum turgidum L. var. durum).Additionally, QTLs affecting flour redness (Fa*) andbrightness (FL*) color parameters were investigated.A population of 93 RILs (UC1113 9 Kofa) wasevaluated in three locations of Argentina over 2 years.High heritability values ([94%) were obtained for Fb*and YPC, whereas FL* and Fa* showed intermediateto high values. The main QTLs affecting Fb* and YPCoverlapped 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 oneadditional linked QTL was detected. A novel minorQTL located on 7AS affected Fb*, with an epistaticeffect on YPC. An epistatic interaction occurredbetween the 7AL and 7BL.2 QTLs. The 4AL.2 QTLshowed a strong effect on Fb* and was involved intwo digenic epistatic interactions. The 6AL.2 QTLexplained most of the variation for Fb* and YPC. Themain QTLs affecting FL* and Fa* were located on2BS and 7BL, respectively. These results confirm thecomplex inheritance of flour color traits and open thepossibility of developing perfect markers to improvepasta quality in Argentinean breeding programs.