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High-density molecular characterization and association mapping in Ethiopian durum wheat landraces reveals high diversity and potential for wheat breeding

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Title High-density molecular characterization and association mapping in Ethiopian durum wheat landraces reveals high diversity and potential for wheat breeding
 
Creator Mengistu, D.
Kidane, Y.
Catellani, M.
Frascaroli, E.
Fadda, Carlo
Dell'Acqua, M.
Pe, E.
 
Subject triticum turgidum
durum
wild plants
breeding
 
Description Durum wheat (Triticum turgidum subsp. durum) is a key crop worldwide, and yet, its improvement and adaptation to emerging environmental threats is made difficult by the limited amount of allelic variation included in its elite pool. New allelic diversity may provide novel loci to international crop breeding through quantitative trait loci (QTL) mapping in unexplored material.
Here, we report the extensive molecular and phenotypic characterization of hundreds of Ethiopian durum wheat landraces and several Ethiopian improved lines. We test 81 587 markers scoring 30 155 single nucleotide polymorphisms and use them to survey the diversity, structure, and genome-specific variation in the panel. We show the uniqueness of Ethiopian germplasm
using a siding collection of Mediterranean durum wheat accessions. We phenotype the Ethiopian panel for ten agronomic traits in two highly diversified Ethiopian environments for two consecutive years and use this information to conduct a genome-wide association study. We identify several loci underpinning agronomic traits of interest, both confirming loci already reported and describing new promising genomic regions. These loci may be efficiently targeted with molecular markers already available to conduct marker-assisted selection in Ethiopian and international wheat. We show that Ethiopian durum wheat represents an important and mostly unexplored source of durum wheat diversity. The panel analysed in this study allows the accumulation of QTL mapping experiments, providing the initial step for a quantitative, methodical exploitation of untapped diversity in producing a better wheat.
 
Date 2016-09
2017-02-14T12:05:09Z
2017-02-14T12:05:09Z
 
Type Journal Article
 
Identifier Mengistu, D.; Kidane, Y.; Catellani, M.; Frascaroli, E.; Fadda, Pe, E.; C.; Dell'Acqua, M. (2016) High-density molecular characterization and association mapping in Ethiopian durum wheat landraces reveals high diversity and potential for wheat breeding. Plant Biotechnology Journal 14 p.1800-1812 ISSN: 1467-7652
1467-7652
https://hdl.handle.net/10568/79892
http://www.bioversityinternational.org/e-library/publications/detail/high-density-molecular-characterization-and-association-mapping-in-ethiopian-durum-wheat-landraces-reveals-high-diversity-and-potential-for-wheat-breeding/
https://doi.org/10.1111/pbi.12538
 
Language en
 
Rights Copyrighted; all rights reserved
Open Access
 
Format p. 1800-1812
application/pdf
 
Publisher Wiley
 
Source Plant Biotechnology Journal