2008•The Sydney eScholarship Repository (The University of Sydney)Open access
QTLs for yield and adaptation to reduced water and nitrogen inputs in durum wheat
Marco Maccaferri, Sanguineti Mc, Karim Ammar, A. Demontis, E. Deambrogio, A. Massi, Iván Ortiz‐Monasterio, Matthew Reynolds, Simona Corneti, Sandra Stefanelli, Roberto Tuberosa
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Abstract
A population of 181 recombinant inbred lines (RILs) derived from the cross Meridiano × Claudio was evaluated in five field trials varying for water and nitrogen regimes. A preliminary analysis carried out with 213 SSR and DArT markers evidenced two major QTL clusters for grain yield, yield components and several other traits on chrs. 4B and 5A. Favourable alleles were inherited from the parental cultivar Claudio at the 4B QTL region and from Meridiano at the 5A QTL. Additional markers with highly significant effects on grain yield were found on chrs. 2B, 3B, 5B and 7B, with favourable alleles contributed by both parents, thus accounting for the wide transgressive segregation observed among the RILs. Grain yield of the RILs was highly predictable based on the SSR alleles present at four key-chromosome regions.
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