Genetic diversity, distribution and domestication history of the neglected GGAtAt genepool of wheat

Бадаева, Е. Д.; Коновалов, Ф. А.; Knüpffer, H.; Fricano, Agostino; Ruban, Alevtina; Kehel, Zakaria; Zoshchuk, Svyatoslav A.; Суржиков, С. А.; Neumann, Kerstin; Graner, Andreas; Hammer, Karl; Filatenko, A. A.; Bogaard, Amy; Jones, Glynis; Özkan, Hakan; Kilian, Benjamin

doi:10.1007/s00122-021-03912-0

Cited by 24 publications

(21 citation statements)

References 101 publications

(160 reference statements)

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“…and the much more widespread prehistoric 'New Glume Wheat' (T. timopheevii s.l. ), of which the oldest archaeobotanical records were found in Turkey, has been intensively discussed in Badaeva et al [119].…”

Section: Evolution and Domestication Historymentioning

confidence: 99%

“…The tetraploid T. araraticum, the wild progenitor of the Timopheevii wheat lineage, potentially originated in Northern Iraq [101,117,118]. Based on analyses of nuclear and cytoplasmic genomes, T. araraticum can be divided into two subgroups: one subgroup (ARA-0) is widespread, while the other (ARA-1) is found only in South-eastern Turkey and North-western Syria [119]. Triticum timopheevii (2n = 4x = 28, GGA t A t ), the domesticated form of T. araraticum, has been cultivated only in western Georgia in the recent past.…”

Section: Evolution and Domestication Historymentioning

confidence: 99%

“…The Zanduri spring wheat complex, which consisted of a mixture of T. monococcum and T. timopheevii landraces, was well adapted to Lechkhumi and Racha, two historical provinces of Georgia. Zanduri wheat showed remarkable resistance to fungal diseases (see Badaeva et al [119] for more details on T. timopheevii and T. zhukovskyi). The seeds of this single T. zhukovskyi spike gave rise to 51 accessions that are now maintained in 18 genebanks worldwide, as documented by Genesys [132], while Knüpffer [57] reported 64 T. zhukovskyi accessions in 22 genebanks worldwide.…”

Section: Evolution and Domestication Historymentioning

confidence: 99%

“…Recent studies on the genomic and cytogenetic diversity, distribution, and domestication of the tetraploid GGA t A t genepool will promote the introgression of useful variation from this hitherto neglected genepool into common wheat [119]. Other recent studies have explored the genomic diversity among 80,000 wheat accessions, including several lines from global breeding programs as well as old wheat cultivars.…”

Section: Status Of Pgr Use For Wheat Improvementmentioning

confidence: 99%

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Introducing Beneficial Alleles from Plant Genetic Resources into the Wheat Germplasm

Sharma¹,

Schulthess

Bassi³

et al. 2021

Biology

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Wheat (Triticum sp.) is one of the world’s most important crops, and constantly increasing its productivity is crucial to the livelihoods of millions of people. However, more than a century of intensive breeding and selection processes have eroded genetic diversity in the elite genepool, making new genetic gains difficult. Therefore, the need to introduce novel genetic diversity into modern wheat has become increasingly important. This review provides an overview of the plant genetic resources (PGR) available for wheat. We describe the most important taxonomic and phylogenetic relationships of these PGR to guide their use in wheat breeding. In addition, we present the status of the use of some of these resources in wheat breeding programs. We propose several introgression schemes that allow the transfer of qualitative and quantitative alleles from PGR into elite germplasm. With this in mind, we propose the use of a stage-gate approach to align the pre-breeding with main breeding programs to meet the needs of breeders, farmers, and end-users. Overall, this review provides a clear starting point to guide the introgression of useful alleles over the next decade.

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Section: Evolution and Domestication Historymentioning

confidence: 99%

Section: Evolution and Domestication Historymentioning

confidence: 99%

Section: Evolution and Domestication Historymentioning

confidence: 99%

Section: Status Of Pgr Use For Wheat Improvementmentioning

confidence: 99%

See 2 more Smart Citations

Introducing Beneficial Alleles from Plant Genetic Resources into the Wheat Germplasm

Sharma¹,

Schulthess

Bassi³

et al. 2021

Biology

Self Cite

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show abstract

“…A number of authors have also reported different accessions of T. timopheevii as carrying karyotype rearrangements (Badaeva et al, 1994; Badaeva et al, 1990; Badaeva et al, 2022; Kawahara and Tanaka 1977; Taketa and Kawahara 1996). Thus, in addition to the species-specific translocations described above, the accession used in this work may have carried additional rearrangements affecting recombination and hence introgression.…”

Section: Discussionmentioning

confidence: 99%

Introgression of the Triticum timopheevii genome into wheat detected by chromosome-specific KASP markers

King

Grewal

Othmeni

et al. 2022

Preprint

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Triticum timopheevii (2n=28, AtAtGG) is a tetraploid wild relative species with great potential to increase the genetic diversity of hexaploid wheat Triticum aestivum (2n=42, AABBDD) for various important agronomic traits. A breeding scheme that propagated advanced backcrossed populations of wheat-T. timopheevii introgression lines through further backcrossing and self-fertilisation resulted in the generation of 99 introgression lines (ILs) that carried 309 homozygous segments from the At and G subgenomes of T. timopheevii. These introgressions contained 89 and 74 unique segments from the At and G subgenomes, respectively. These overlapping segments covered 98.9% of the T. timopheevii genome that has now been introgressed into bread wheat cv. Paragon including the entirety of all T. timopheevii chromosomes via varying sized segments except for chromosomes 3At, 4G and 6G. Homozygous ILs contained between one and eight of these introgressions with an average of three per introgression line. These homozygous introgressions were detected through the development of a set of 480 chromosome-specific Kompetitive allele specific PCR (KASP) markers that are well-distributed across the wheat genome. Of these, 149 were developed in this study based on single nucleotide polymorphisms (SNPs) discovered through whole genome sequencing of T. timopheevii. A majority of these KASP markers were also found to be T. timopheevii subgenome specific with 182 detecting At subgenome and 275 detecting G subgenome segments. These markers showed that 98% of the At segments had recombined with the A genome of wheat and 74% of the G genome segments had recombined with the B genome of wheat with the rest recombining with the D genome of wheat. These results were validated through multi-colour in situ hybridisation analysis. Together these homozygous wheat-T. timopheevii ILs and chromosome-specific KASP markers provide an invaluable resource to wheat breeders for trait discovery to combat biotic and abiotic stress factors affecting wheat production due to climate change.

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Phenotyping and identification of target traits for de novo domestication of wheat wild relatives

Zeibig,

Kilian,

Özkan

et al. 2023

Food and Energy Security

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De novo domestication—the modification of domestication genes in crop wild relatives via genome editing—is an approach for harnessing the beneficial genetic diversity of crop wild relatives. A prerequisite for de novo domestication is phenotyping to identify genetic materials suitable for cultivation in the respective environment. Taxa from the wheat genepool (Triticum aestivum, Triticum durum, Triticum monococcum) are a staple food; these taxa comprise wild relatives of different ploidy levels. The diploid Triticum boeoticum and Triticum urartu and the tetraploid Triticum dicoccoides and Triticum araraticum harbor desirable traits such as high grain quality and abiotic and biotic stress tolerance. Hence, they are candidates for de novo domestication. Here, we grew 111 wild wheats and 38 landraces originating predominantly from the Fertile Crescent and six modern wheat cultivars in a field in Giessen, Germany, to evaluate their environmental adaptability to the central European climate and to identify potential candidates and target traits for de novo domestication. We demonstrate that several wild taxa are suitable for cultivation in the central European environment and that they have distinct characteristics that need to be modified during de novo domestication. The normalized difference vegetation index and the thermal time to heading and flowering indicated excellent adaptability of some wheat wild relatives to central European conditions. The values of yield parameters such as grain weight per plant, number of tillers, and thousand kernel weight were lower in the wild wheats than in the landraces. Therefore, these traits should be targeted for improvement during the de novo domestication of wild wheats.

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Genetic diversity, distribution and domestication history of the neglected GGAtAt genepool of wheat

Cited by 24 publications

References 101 publications

Introducing Beneficial Alleles from Plant Genetic Resources into the Wheat Germplasm

Introducing Beneficial Alleles from Plant Genetic Resources into the Wheat Germplasm

Introgression of the Triticum timopheevii genome into wheat detected by chromosome-specific KASP markers

Phenotyping and identification of target traits for de novo domestication of wheat wild relatives

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