title: Quantitative trait loci for grain yield and adaptation of durum wheat (Triticum durum Desf.) across a wide range of water availability.
abstract: Grain yield is a major goal for the improvement of durum wheat, particularly in drought-prone areas. In this study, the genetic basis of grain yield (GY), heading date (HD), and plant height (PH) was investigated in a durum wheat population of 249 recombinant inbred lines evaluated in 16 environments (10 rainfed and 6 irrigated) characterized by a broad range of water availability and GY (from 5.6 to 58.8 q ha(-1)). Among the 16 quantitative trait loci (QTL) that affected GY, two major QTL on chromosomes 2BL and 3BS showed significant effects in 8 and 7 environments, with R2 values of 21.5 and 13.8% (mean data of all 16 environments), respectively. In both cases, extensive overlap was observed between the LOD profiles of GY and PH, but not with those for HD. QTL specific for PH were identified on chromosomes 1BS, 3AL, and 7AS. Additionally, three major QTL for HD on chromosomes 2AS, 2BL, and 7BS showed limited or no effects on GY. For both PH and GY, notable epistasis between the chromosome 2BL and 3BS QTL was detected across several environments.
authors.affiliation: Department of Agroenvironmental Sciences and Technology, University of Bologna, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Maccaferri
authors.forename: Maria Corinna
authors.initials: MC
authors.lastname: Sanguineti
authors.forename: Simona
authors.initials: S
authors.lastname: Corneti
authors.forename: José Luis Araus
authors.initials: JL
authors.lastname: Ortega
authors.forename: Moncef Ben
authors.initials: MB
authors.lastname: Salem
authors.forename: Jordi
authors.initials: J
authors.lastname: Bort
authors.forename: Enzo
authors.initials: E
authors.lastname: DeAmbrogio
authors.forename: Luis Fernando Garcia
authors.initials: LF
authors.lastname: del Moral
authors.forename: Andrea
authors.initials: A
authors.lastname: Demontis
authors.forename: Ahmed
authors.initials: A
authors.lastname: El-Ahmed
authors.forename: Fouad
authors.initials: F
authors.lastname: Maalouf
authors.forename: Hassan
authors.initials: H
authors.lastname: Machlab
authors.forename: Vanessa
authors.initials: V
authors.lastname: Martos
authors.forename: Marc
authors.initials: M
authors.lastname: Moragues
authors.forename: Jihan
authors.initials: J
authors.lastname: Motawaj
authors.forename: Miloudi
authors.initials: M
authors.lastname: Nachit
authors.forename: Nasserlehaq
authors.initials: N
authors.lastname: Nserallah
authors.forename: Hassan
authors.initials: H
authors.lastname: Ouabbou
authors.forename: Conxita
authors.initials: C
authors.lastname: Royo
authors.forename: Amor
authors.initials: A
authors.lastname: Slama
authors.forename: Roberto
authors.initials: R
authors.lastname: Tuberosa
mesh_terms: D000222:Adaptation, Physiological / Q000235:genetics*; D032461:Chromosomes, Plant / Q000235:genetics; D002523:Edible Grain / Q000235:genetics*; D004777:Environment; D004843:Epistasis, Genetic; D014644:Genetic Variation; D007178:Inbreeding; D008126:Lod Score; D010641:Phenotype; D040641:Quantitative Trait Loci / Q000235:genetics*; D014908:Triticum / Q000033:anatomy & histology / Q000235:genetics*; D014867:Water / Q000502:physiology*
chemical_list: D014867:Water