Editorial: Aegilops: Promising Genesources to Improve Agronomical and Quality Traits of Wheat

Rakszegi, Marianna; Molnár, István; Darkó, Éva; Tiwari, Vijay K.; Shewry, Peter R.

doi:10.3389/fpls.2020.01060

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…The genus Aegilops encompasses the secondary and tertiary gene pool of bread wheat with a central role in wheat evolution and domestication being the donors of B and D subgenomes. The Aegilops species are critically important in providing biotic resistance and abiotic tolerance as well as yield-related genetic loci to wheat ( Kishii, 2019 ; Rakszegi et al., 2020 ). For instance, Ae .…”

Section: Introductionmentioning

confidence: 99%

Genomic characterization and gene bank curation of Aegilops: the wild relatives of wheat

Adhikari,

Raupp,

et al. 2023

Front. Plant Sci.

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Genetic diversity found in crop wild relatives is critical to preserve and utilize for crop improvement to achieve sustainable food production amid climate change and increased demand. We genetically characterized a large collection of 1,041 Aegilops accessions distributed among 23 different species using more than 45K single nucleotide polymorphisms identified by genotyping-by-sequencing. The Wheat Genetics Resource Center (WGRC) Aegilops germplasm collection was curated through the identification of misclassified and redundant accessions. There were 49 misclassified and 28 sets of redundant accessions within the four diploid species. The curated germplasm sets now have improved utility for genetic studies and wheat improvement. We constructed a phylogenetic tree and principal component analysis cluster for all Aegilops species together, giving one of the most comprehensive views of Aegilops. The Sitopsis section and the U genome Aegilops clade were further scrutinized with in-depth population analysis. The genetic relatedness among the pair of Aegilops species provided strong evidence for the species evolution, speciation, and diversification. We inferred genome symbols for two species Ae. neglecta and Ae. columnaris based on the sequence read mapping and the presence of segregating loci on the pertinent genomes as well as genetic clustering. The high genetic diversity observed among Aegilops species indicated that the genus could play an even greater role in providing the critical need for untapped genetic diversity for future wheat breeding and improvement. To fully characterize these Aegilops species, there is an urgent need to generate reference assemblies for these wild wheats, especially for the polyploid Aegilops.

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Section: Introductionmentioning

confidence: 99%

Genomic characterization and gene bank curation of Aegilops: the wild relatives of wheat

Adhikari,

Raupp,

et al. 2023

Front. Plant Sci.

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show abstract

“…In this respect, the genus Aegilops encompasses the secondary and tertiary gene pool of bread wheat with a central role in wheat evolution and domestication being the donors of B and D subgenomes. As a taxon with high allelic diversity, Aegilops species are critically important to provide biotic resistance and abiotic tolerance as well as yield-related genetic loci to wheat (Rakszegi et al, 2020;Kishii, 2019). For instance, Ae.…”

Section: Introductionmentioning

confidence: 99%

Genomic Characterization and Gene Bank Curation ofAegilops: The Wild Relatives of Wheat

Adhikari

Raupp

et al. 2023

Preprint

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Genetic diversity found in crop wild relatives is critical to preserve and utilize for crop improvement to achieve sustainable food production amid climate change and increased demand. We genetically characterized a large collection of 1,041 Aegilops accessions distributed among 23 different species using more than 45K single nucleotide polymorphisms identified by genotyping-by-sequencing (GBS). The Wheat Genetics Resource Center (WGRC) Aegilops germplasm collection was curated through the identification of misclassified and redundant accessions. There were 49 misclassified and 28 sets of redundant accessions within the four diploid species. The curated germplasm sets now have improved utility for genetic studies and wheat improvement. We constructed a phylogenetic tree and PCA cluster for all Aegilops species together, giving one of the most comprehensive views of Aegilops. The Sitopsis section and the U genome Aegilops clade were further scrutinized with in-depth population analysis. The genetic relatedness among the pair of Aegilops species provided strong evidence for the species evolution, speciation and diversification. We inferred genome symbols for two species Ae. neglecta and Ae. columnaris based on the sequence read mapping and the presence of segregating loci on the pertinent genomes as well as genetic clustering. The high genetic diversity observed among Aegilops species indicated that the genus could play an even greater role in providing the critical need for untapped genetic diversity for future wheat breeding and improvement. To fully characterize these Aegilops species, there is an urgent need to generate reference assemblies for these wild wheats, especially for the polyploid Aegilops.

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“…The genetic resources stored in wild relatives of crops are potential sources of new genetic diversity to be introduced into wheat breeding programs(Sharma et al 2021). Aegilops and wild wheat species have a potential interest to be useful allele sources in the improvement of T. aestivum(Huertas-García et al 2021;Rakszegi et al 2020). Many physiological, productivity and quality performances of cultivated wheat could be modified via the contribution of Aegilops species(Kumar et al 2019;Qiu et al 2022).…”

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confidence: 99%

Assessment of genetic relation for Aegilops and Triticum possessing different genome-bearing species using start codon targeted marker

Ahmad

2023

Genet Resour Crop Evol

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The Fertile Crescent of Southwest Asia holds high genetic diversity of crop species of the grass tribe Triticeae, which provide staple food for the majority human population. Genetic diversity and their relationships were studied among 51 accessions from Aegilops and Triticum species from Iraqi Kurdistan.Eighteen SCoT markers were used to generate a total of 139 alleles. The discriminating power of the markers was assessed with polymorphism information content (PIC) and marker index (MI), that valued at 0.56 and 3.7, respectively. These results indicate the informativeness of the markers used for studying genetic diversity among the Aegilops and Triticum species. A high level of diversity was identified among the accession, to separate three distinct groups based on the SCoT data. All the accessions from different species with an 'A' genome were clustered together in a group, including Aegilops tauschii (possessing D genome). While the other Aegilops (U genome) were clustered in the other two groups. Analysis of molecular variance (AMOVA) partitioned 62% of variability among populations, while 38% of variation was considered between accessions within populations. Principal coordinate analysis (PCoA) for SCoT data showed that the first two components clarified 54.73% of the total variation, indicating consistent patterns of genetic relationships between the accessions. Genetic relationships inferred from UPGMA dendrogram analysis were matched with the PCoA, indicating that the grouping patterns of the accessions were in agreement with their botanical classifications. These results obtained could allow for future insight into wheat breeding programs.

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Editorial: Aegilops: Promising Genesources to Improve Agronomical and Quality Traits of Wheat

Cited by 5 publications

References 23 publications

Genomic characterization and gene bank curation of Aegilops: the wild relatives of wheat

Genomic characterization and gene bank curation of Aegilops: the wild relatives of wheat

Genomic Characterization and Gene Bank Curation ofAegilops: The Wild Relatives of Wheat

Assessment of genetic relation for Aegilops and Triticum possessing different genome-bearing species using start codon targeted marker

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