High molecular weight glutenin gene diversity in Aegilops tauschii demonstrates unique origin of superior wheat quality
| Autor: | Jose Fausto Cervantes Lopez, Emily Delorean, Maria Itria Ibba, Brande B. H. Wulff, Jesse Poland, Liangliang Gao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Agricultural genetics
Crops Agricultural Plant genetics Lineage (genetic) Glutens QH301-705.5 Aegilops Medicine (miscellaneous) Crops Biology Genome Article General Biochemistry Genetics and Molecular Biology Glutenin Genetics Aegilops tauschii Allele Biology (General) Gene Plant Proteins Agricultural Human Genome Haplotype Genetic Variation food and beverages biology.organism_classification Molecular Weight Plant Breeding Population bottleneck biology.protein Open Wild Wheat Consortium General Agricultural and Biological Sciences |
| Zdroj: | Communications Biology, Vol 4, Iss 1, Pp 1-9 (2021) Comm. Biol. 4:1242 (2021) Communications Biology Communications biology, vol 4, iss 1 |
| ISSN: | 2399-3642 |
| Popis: | Central to the diversity of wheat products was the origin of hexaploid bread wheat, which added the D-genome of Aegilops tauschii to tetraploid wheat giving rise to superior dough properties in leavened breads. The polyploidization, however, imposed a genetic bottleneck, with only limited diversity introduced in the wheat D-subgenome. To understand genetic variants for quality, we sequenced 273 accessions spanning the known diversity of Ae. tauschii. We discovered 45 haplotypes in Glu-D1, a major determinant of quality, relative to the two predominant haplotypes in wheat. The wheat allele 2 + 12 was found in Ae. tauschii Lineage 2, the donor of the wheat D-subgenome. Conversely, the superior quality wheat allele 5 + 10 allele originated in Lineage 3, a recently characterized lineage of Ae. tauschii, showing a unique origin of this important allele. These two wheat alleles were also quite similar relative to the total observed molecular diversity in Ae. tauschii at Glu-D1. Ae. tauschii is thus a reservoir for unique Glu-D1 alleles and provides the genomic resource to begin utilizing new alleles for end-use quality improvement in wheat breeding programs. Delorean et al., along with colleagues from the Open Wild Wheat Consortium, present an analysis of Aegilops tauschii genomes to investigate the origins of the Glu-D1 gene in modern wheats. They discover an abundance of novel Glu-D1 gene alleles that could serve as a reservoir for generating higher quality wheat varieties. This is a companion to the Consortium paper which is available in Nature Biotechnology. |
| Databáze: | OpenAIRE |
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