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Broadening the bread wheat D genome.
Theor Appl Genet. 2019 May; 132(5):1295-1307.TA

Abstract

KEY MESSAGE

Although Ae. tauschii has been extensively utilised for wheat breeding, the D-genome-containing allopolyploids have largely remained unexploited. In this review, we discuss approaches that can be used to exploit the D genomes of the different Aegilops species for the improvement of bread wheat. The D genome of allohexaploid bread wheat (Triticum aestivum, 2n = AABBDD) is the least diverse of the three wheat genomes and is unarguably less diverse than that of diploid progenitor Aegilops tauschii (2n = DD). Useful genetic variation and phenotypic traits also exist within each of the wheat group species containing a copy of the D genome: allopolyploid Aegilops species Ae. cylindrica (2n = DcDcCcCc), Ae. crassa 4x (2n = D1D1XcrXcr), Ae. crassa 6x (2n = D1D1XcrXcrDcrDcr), Ae. ventricosa (2n = DvDvNvNv), Ae. vavilovii (2n = D1D1XcrXcrSvSv) and Ae. juvenalis (2n = D1D1XcrXcrUjUj). Although Ae. tauschii has been extensively utilised for wheat breeding, the D-genome-containing allopolyploids have largely remained unexploited. Some of these D genomes appear to be modified relative to the bread wheat and Ae. tauschii D genomes, and others present in the allopolyploids may also contain useful variation as a result of adaptation to an allopolyploid, multi-genome environment. We summarise the genetic relationships, karyotypic variation and phenotypic traits known to be present in each of the D genome species that could be of relevance for bread wheat improvement and discuss approaches that can be used to exploit the D genomes of the different Aegilops species for the improvement of bread wheat. Better understanding of factors controlling chromosome inheritance and recombination in wheat group interspecific hybrids, as well as effective utilisation of new and developing genetics and genomics technologies, have great potential to improve the agronomic potential of the bread wheat D genome.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Mirzaghaderi G
Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Kurdistan, P. O. Box 416, Sanandaj, Iran. gh.mirzaghaderi@uok.ac.ir.
Mason AS
Department of Plant Breeding, Justus Liebig University, IFZ Research Centre for Biosystems, Land Use and Nutrition, Heinrich-Buff-Ring 26-32, Giessen, 35392, Germany.

MeSH

AegilopsBreedingEvolution, MolecularGenetic VariationGenome, PlantHybridization, GeneticKaryotypePhenotypePolyploidyTriticum

Pub Type(s)

Journal Article
Review

Language

eng

PubMed ID

30739154

Citation

Mirzaghaderi, Ghader, and Annaliese S. Mason. "Broadening the Bread Wheat D Genome." TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, vol. 132, no. 5, 2019, pp. 1295-1307.
Mirzaghaderi G, Mason AS. Broadening the bread wheat D genome. Theor Appl Genet. 2019;132(5):1295-1307.
Mirzaghaderi, G., & Mason, A. S. (2019). Broadening the bread wheat D genome. TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, 132(5), 1295-1307. https://doi.org/10.1007/s00122-019-03299-z
Mirzaghaderi G, Mason AS. Broadening the Bread Wheat D Genome. Theor Appl Genet. 2019;132(5):1295-1307. PubMed PMID: 30739154.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Broadening the bread wheat D genome. AU - Mirzaghaderi,Ghader, AU - Mason,Annaliese S, Y1 - 2019/02/10/ PY - 2018/10/27/received PY - 2019/02/02/accepted PY - 2019/2/11/pubmed PY - 2019/8/20/medline PY - 2019/2/11/entrez SP - 1295 EP - 1307 JF - TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik JO - Theor Appl Genet VL - 132 IS - 5 N2 - KEY MESSAGE: Although Ae. tauschii has been extensively utilised for wheat breeding, the D-genome-containing allopolyploids have largely remained unexploited. In this review, we discuss approaches that can be used to exploit the D genomes of the different Aegilops species for the improvement of bread wheat. The D genome of allohexaploid bread wheat (Triticum aestivum, 2n = AABBDD) is the least diverse of the three wheat genomes and is unarguably less diverse than that of diploid progenitor Aegilops tauschii (2n = DD). Useful genetic variation and phenotypic traits also exist within each of the wheat group species containing a copy of the D genome: allopolyploid Aegilops species Ae. cylindrica (2n = DcDcCcCc), Ae. crassa 4x (2n = D1D1XcrXcr), Ae. crassa 6x (2n = D1D1XcrXcrDcrDcr), Ae. ventricosa (2n = DvDvNvNv), Ae. vavilovii (2n = D1D1XcrXcrSvSv) and Ae. juvenalis (2n = D1D1XcrXcrUjUj). Although Ae. tauschii has been extensively utilised for wheat breeding, the D-genome-containing allopolyploids have largely remained unexploited. Some of these D genomes appear to be modified relative to the bread wheat and Ae. tauschii D genomes, and others present in the allopolyploids may also contain useful variation as a result of adaptation to an allopolyploid, multi-genome environment. We summarise the genetic relationships, karyotypic variation and phenotypic traits known to be present in each of the D genome species that could be of relevance for bread wheat improvement and discuss approaches that can be used to exploit the D genomes of the different Aegilops species for the improvement of bread wheat. Better understanding of factors controlling chromosome inheritance and recombination in wheat group interspecific hybrids, as well as effective utilisation of new and developing genetics and genomics technologies, have great potential to improve the agronomic potential of the bread wheat D genome. SN - 1432-2242 UR - https://www.unboundmedicine.com/medline/citation/30739154/Broadening_the_bread_wheat_D_genome_ DB - PRIME DP - Unbound Medicine ER -