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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Association mapping in durum wheat grown across a broad range of water regimes
Journal of Experimental Botany, Volume 62, No. 2, Year 2011
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Description
Association mapping was used to dissect the genetic basis of drought-adaptive traits and grain yield (GY) in a collection of 189 elite durum wheat accessions evaluated in 15 environments highly different for water availability during the crop cycle (from 146 to 711 mm) and GY (from 9.9 to 67.3 q ha-1). For highly heritable traits (e.g. heading date, kernel weight, etc.) several significant experiment-wise marker-trait associations were detected across five or more (up to 13 for kernel weight) environments, with R2 values ranging from ca. 5 to 10%. As to GY, significant associations (R2 from 2.5 to 4.2%) were mostly detected in one environment only (56 markers), while decreasing rapidly from two to five environments (from 20 to three markers, respectively) and with only one marker (Xbarc197 on chr. 5A) found significant in six environments (ranging from low- to high-yielding). These results are probably due to the complex genetic basis of GY and its interaction with environmental conditions. The number of markers significantly affecting GY decreased considerably under drought conditions, suggesting a limited effectiveness of association mapping to identify loci for GY under low-moisture conditions, most likely because different genotypes can attain similar phenotypes via different morpho-physiological traits and corresponding gene networks. Our study confirmed the role of major loci for phenology previously described in biparental mapping populations, highlighted a novel set of loci for drought-adaptive traits, and provided information on the agronomic value of the alleles at such loci across a broad range of soil moisture conditions. © 2010 The Author(s).
Authors & Co-Authors
Maccaferri, Marco
Italy, Bologna
Alma Mater Studiorum Università Di Bologna
Sanguineti, Maria Corinna
Italy, Bologna
Alma Mater Studiorum Università Di Bologna
Demontis, Andrea
Italy, Bologna
Società Produttori Sementi Bologna
El-Ahmed, Ahmed
Syrian Arab Republic, Aleppo
University of Aleppo
García Del Moral, L. F.
Spain, Granada
Universidad de Granada
Maalouf, Fouad S.
Lebanon, Fanar
Institut de Recherches Agronomiques Libanais
Nachit, Miloudi Mikael
Lebanon, Beirut
International Center for Agricultural Research in the Dry Areas Syria
Nserallah, Nasserlehaq
Morocco, Settat
Centre Régional de la Recherche Agronomique de Settat
Ouabbou, Hassan
Morocco, Settat
Centre Régional de la Recherche Agronomique de Settat
Rhouma, Sayar
Tunisia, Tunis
University of Carthage, Institut National de la Recherche Agronomique de Tunisie
Royo, Conxita
Spain, Caldes de Montbui
Institut de Recerca I Technologia Agroalimentaries
Villegas, Dolors
Spain, Caldes de Montbui
Institut de Recerca I Technologia Agroalimentaries
Tuberosa, Roberto
Italy, Bologna
Alma Mater Studiorum Università Di Bologna
Statistics
Citations: 205
Authors: 13
Affiliations: 9
Identifiers
Doi:
10.1093/jxb/erq287
ISSN:
00220957
e-ISSN:
14602431
Research Areas
Environmental
Genetics And Genomics
Study Approach
Quantitative