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Revilla P, Rodríguez VM, Ordás A, Rincent R, Charcosset A, Giauffret C, Melchinger AE, Schön CC, Bauer E, Altmann T, Brunel D, Moreno-González J, Campo L, Ouzunova M, Álvarez Á, Ruíz de Galarreta JI, Laborde J, Malvar RA. Association mapping for cold tolerance in two large maize inbred panels. BMC Plant Biol 2016; 16:127. [PMID: 27267760 PMCID: PMC4895824 DOI: 10.1186/s12870-016-0816-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 05/20/2016] [Indexed: 05/19/2023]
Abstract
BACKGROUND Breeding for cold tolerance in maize promises to allow increasing growth area and production in temperate zones. The objective of this research was to conduct genome-wide association analyses (GWAS) in temperate maize inbred lines and to find strategies for pyramiding genes for cold tolerance. Two panels of 306 dent and 292 European flint maize inbred lines were evaluated per se and in testcrosses under cold and control conditions in a growth chamber. We recorded indirect measures for cold tolerance as the traits number of days from sowing to emergence, relative leaf chlorophyll content or quantum efficiency of photosystem II. Association mapping for identifying genes associated to cold tolerance in both panels was based on genotyping with 49,585 genome-wide single nucleotide polymorphism (SNP) markers. RESULTS We found 275 significant associations, most of them in the inbreds evaluated per se, in the flint panel, and under control conditions. A few candidate genes coincided between the current research and previous reports. A total of 47 flint inbreds harbored the favorable alleles for six significant quantitative trait loci (QTL) detected for inbreds per se evaluated under cold conditions, four of them had also the favorable alleles for the main QTL detected from the testcrosses. Only four dent inbreds (EZ47, F924, NK807 and PHJ40) harbored the favorable alleles for three main QTL detected from the evaluation of the dent inbreds per se under cold conditions. There were more QTL in the flint panel and most of the QTL were associated with days to emergence and ΦPSII. CONCLUSIONS These results open new possibilities to genetically improve cold tolerance either with genome-wide selection or with marker assisted selection.
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Affiliation(s)
- Pedro Revilla
- Misión Biológica de Galicia, Spanish National Research Council (CSIC), PO Box 2836080, Pontevedra, Spain.
| | - Víctor Manuel Rodríguez
- Misión Biológica de Galicia, Spanish National Research Council (CSIC), PO Box 2836080, Pontevedra, Spain
| | - Amando Ordás
- Misión Biológica de Galicia, Spanish National Research Council (CSIC), PO Box 2836080, Pontevedra, Spain
| | - Renaud Rincent
- INRA, UMR de Génétique Végétale/Université Paris-Sud - CNRS - AgroParisTech, Gif-sur-Yvette, France
| | - Alain Charcosset
- INRA, UMR de Génétique Végétale/Université Paris-Sud - CNRS - AgroParisTech, Gif-sur-Yvette, France
| | - Catherine Giauffret
- UMR INRA/USTL 1281 Stress Abiotiques et Différenciation des Végetaux cultivés, Péronne, France
| | - Albrecht E Melchinger
- Institute of Plant Breeding, Seed Science and Population Genetics, Universität Hohenheim, Stuttgart, Germany
| | | | - Eva Bauer
- Plant Breeding, Technische Universität München, Freising, Germany
| | - Thomas Altmann
- Molecular Genetics, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | | | | | - Laura Campo
- Centro Investigacións Agrarias Mabegondo (CIAM), A Coruña, Spain
| | | | - Ángel Álvarez
- Estación Experimental de Aula Dei (CSIC), Saragossa, Spain
| | | | | | - Rosa Ana Malvar
- Misión Biológica de Galicia, Spanish National Research Council (CSIC), PO Box 2836080, Pontevedra, Spain
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