1. A panel of elite accessions of durum wheat (Triticum durumDesf.) suitable for association mapping studies
- Author
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Cynda Chenenaoui, Fouad Maalouf, Moncef Ben Salem, Enzo De Ambrogio, H. Machlab, Jihan Motawaj, Luis F. García del Moral, Jordi Bort, Mark Moragues, Maria Corinna Sanguineti, Roberto Tuberosa, Ahmed El-Ahmed, Marco Maccaferri, Andrea De Montis, M. M. Nachit, Conxita Royo, H. Ouabbou, José Luis Araus Ortega, V. Natoli, N. Nserallah, MACCAFERRI M., SANGUINETI M.C., NATOLI V., ARAUS ORTEGA J.L., BEN SALEM M., BORT J., CHENENAOUI C., DE AMBROGIO E., GARCIA DEL MORAL L.F., DE MONTIS A., EL-AHMED A., MAALOUF F., MACHLAB H., MORAGUES M., MOTAWAJ J., NACHIT M.M., NSERALLAH N., OUABBOU H., ROYO C., and TUBEROSA R.
- Subjects
Linkage disequilibrium ,AFLP ,Population structure ,durum wheat ,Plant Science ,Biology ,SSR ,Centimorgan ,Agronomy ,Triticum durum ,Genetics ,Microsatellite ,Amplified fragment length polymorphism ,Cultivar ,Gene pool ,association mapping ,Association mapping ,Agronomy and Crop Science ,linkage disequilibrium - Abstract
The effectiveness of association mapping (AM) based on linkage disequilibrium (LD) is currently being tested in a number of crops. An important prerequisite for the application of AM is the availability of collections of accessions with a suitable level of genetic variation for target traits and with limited spurious LD due to the presence of population structure. Herein, the results of a genome-wide molecular characterization of a collection of elite durum wheat accessions well-adapted to Mediterranean environments are presented. Ninety-seven highly polymorphic simple sequence repeats and 166 amplified fragment length polymorphism markers were used to characterize 189 durum accessions, mainly cultivars and advanced breeding lines. Genome-wide significant and sizeable LD indices at a centimorgan scale were observed, while LD mainly decayed within 10 cM. On the other hand, effects due to spurious LD were notably lower than those previously observed in a durum wheat collection sampling durum gene pools of more diverse origin. These results, coupled with the high level of genetic variability detected for a number of important morpho-physiological traits and their high heritability, indicate the suitability of this collection for AM studies targeting agronomically important traits.
- Published
- 2006
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