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A panel of elite accessions of durum wheat (Triticum durum Desf.) suitable for association mapping studies

Published online by Cambridge University Press:  12 February 2007

Marco Maccaferri ,
Maria Corinna Sanguineti ,
Vincenzo Natoli ,
José Luis Araus Ortega ,
Moncef Ben Salem ,
Jordi Bort ,
Cynda Chenenaoui ,
Enzo De Ambrogio ,
Luis Garcia del Moral  and
Andrea De Montis
...Show all authors
Marco Maccaferri
Affiliation:
Department of Agroenvironmental Science and Technology, University of Bologna, Bologna, Italy
Maria Corinna Sanguineti
Affiliation:
Department of Agroenvironmental Science and Technology, University of Bologna, Bologna, Italy
Vincenzo Natoli
Affiliation:
Department of Agroenvironmental Science and Technology, University of Bologna, Bologna, Italy
José Luis Araus Ortega
Affiliation:
Departament de Biologia Vegetal, Universitat de Barcelona, Barcelona, Spain
Moncef Ben Salem
Affiliation:
Tunisian National Institute of Agronomic Research, Tunis, Tunisia
Jordi Bort
Affiliation:
Departament de Biologia Vegetal, Universitat de Barcelona, Barcelona, Spain
Cynda Chenenaoui
Affiliation:
Tunisian National Institute of Agronomic Research, Tunis, Tunisia
Enzo De Ambrogio
Affiliation:
Società Produttori Sementi Bologna, Divisione Ricerca, Argelato (BO), Italy
Luis Garcia del Moral
Affiliation:
Dpto. Fisiologia Vegetal, University of Granada, Granada, Spain
Andrea De Montis
Affiliation:
Società Produttori Sementi Bologna, Divisione Ricerca, Argelato (BO), Italy
Ahmed El-Ahmed
Affiliation:
Plant Protection Department, Aleppo University, Aleppo, Syria
Fouad Maalouf
Affiliation:
Department of Plant Breeding, Lebanese Agricultural Research Institute, Bekaa, Lebanon
Hassan Machlab
Affiliation:
Department of Plant Breeding, Lebanese Agricultural Research Institute, Bekaa, Lebanon
Mark Moragues
Affiliation:
Area de Conreus Extensius Centre Udl-IRTA, Lleida, Spain
Jihan Motawaj
Affiliation:
ICARDA, Aleppo, Syria
Miloudi Nachit
Affiliation:
ICARDA, Aleppo, Syria
Nasserlehaq Nserallah
Affiliation:
CRRA-INRA, Settat, Morocco
Hassan Ouabbou
Affiliation:
CRRA-INRA, Settat, Morocco
Conxita Royo
Affiliation:
Area de Conreus Extensius Centre Udl-IRTA, Lleida, Spain
Roberto Tuberosa*
Affiliation:
Department of Agroenvironmental Science and Technology, University of Bologna, Bologna, Italy
*
*Corresponding author. E-mail:roberto.tuberosa@unibo.it
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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.

Keywords

AFLPassociation mappingdurum wheatlinkage disequilibriumSSRTriticum durum
Type
Research Article
Information
Plant Genetic Resources , Volume 4 , Issue 1 , April 2006 , pp. 79 - 85
Copyright
Copyright © NIAB 2006

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