The Origin and Resource Potential of Wild and Cultivated Species of the Genus of Oats (Avena L.)

Лоскутов, И. Г.; Gnutikov, A. A.; Blinova, E. V.; Rodionov, A. V.

doi:10.1134/s1022795421060065

Cited by 8 publications

(5 citation statements)

References 114 publications

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“…Currently, available literature shows that many wild and weedy Avena species can be used in breeding programs as donors of many valuable traits which enable the increase of the yield and grain quality (e.g., A. fatua, A. sterilis, A. ludovicina, A. occidentalis;Trofimovskaya et al, 1976;Frey 1991;Miller et al 1993;Loskutov et al 2021) as well as protein content in straw and green matter (e.g., A. abyssinica, A. magna, A. ludovicina, A. sterilis;Mal 1987;Rezai 1977;Loskutov and Rines 2011;Ociepa 2019).…”

Section: Introductionmentioning

confidence: 99%

“…However, despite intensive efforts which have been made to describe the genetic diversity and perform biochemical characteristics of particular collections, representing existing gene pools of cultivated oats, we are still lacking their comprehensive characterization. Currently, available literature shows that many wild and weedy Avena species can be used in breeding programs as donors of many valuable traits which enable the increase of the yield and grain quality (e.g., A. fatua , A. sterilis , A. ludovicina , A. occidentalis ; Trofimovskaya et al, 1976 ; Frey 1991 ; Miller et al 1993 ; Loskutov et al 2021 ) as well as protein content in straw and green matter (e.g., A. abyssinica , A. magna , A. ludovicina , A. sterilis ; Mal 1987 ; Rezai 1977 ; Loskutov and Rines 2011 ; Ociepa 2019 ). Wild Avena species can be used also to improve the cultivated forms of oat in terms of disease and pathogen resistance, earliness, or highly productive tillering (Marshal and Shaner 1992 ; Leonard et al 2004 ; Okoń et al 2016 , 2018 ; Gordon et al 2022 ).…”

Section: Introductionmentioning

confidence: 99%

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The comparison of polymorphism among Avena species revealed by retrotransposon-based DNA markers and soluble carbohydrates in seeds

et al. 2023

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Here, we compared the polymorphism among 13 Avena species revealed by the iPBS markers and soluble carbohydrate profiles in seeds. The application of seven iPBS markers generated 83 bands, out of which 20.5% were polymorphic. No species-specific bands were scored. Shannon’s information index (I) and expected heterozygosity (He) revealed low genetic diversity, with the highest values observed for A. nuda (I = 0.099; He = 0.068). UPGMA clustering of studied Avena accessions and PCoA results showed that the polyploidy level is the main grouping criterion. High-resolution gas chromatography revealed that the studied Avena accessions share the same composition of soluble carbohydrates, but significant differences in the content of total (5.30–22.38 mg g−1 of dry weight) and particular sugars among studied samples were observed. Sucrose appeared as the most abundant sugar (mean 61.52% of total soluble carbohydrates), followed by raffinose family oligosaccharides (31.23%), myo-inositol and its galactosides (6.16%), and monosaccharides (1.09%). The pattern of interspecific variation in soluble carbohydrates, showed by PCA, was convergent to that revealed by iPBS markers. Thus, both methods appeared as a source of valuable data useful in the characterization of Avena resources or in the discussion on the evolution of this genus.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The comparison of polymorphism among Avena species revealed by retrotransposon-based DNA markers and soluble carbohydrates in seeds

et al. 2023

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“…Probably not one, but several of the extant CCDD-tetraploids were involved in the formation of hexaploid oat species ( Yan et al., 2021 ), but A. insularis and diploid species having A s genome seem to be putative ancestors of oat hexaploids ( Drossou et al., 2004 ; Badaeva et al., 2005 ; Peng et al., 2018 ; Fominaya et al., 2021 ; Jiang et al., 2021 ). Molecular cytogenetic analysis revealed that none of the modern diploid oat species having A or C genome was the direct ancestor of polyploids, however, A. insularis showed a relatively high number of transcribed spacers, displaying sequence similarity to one accession of A. hirtula ( Loskutov et al., 2021 ). On the other hand, the principal coordinates analysis revealed that A. eriantha and A. longiglumis are closer to CCDD oat tetraploids than other diploids ( Yan et al., 2016 ).…”

Section: Discussionmentioning

confidence: 99%

Oat chromosome and genome evolution defined by widespread terminal intergenomic translocations in polyploids

2022

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Structural chromosome rearrangements involving translocations, fusions and fissions lead to evolutionary variation between species and potentially reproductive isolation and variation in gene expression. While the wheats (Triticeae, Poaceae) and oats (Aveneae) all maintain a basic chromosome number of x=7, genomes of oats show frequent intergenomic translocations, in contrast to wheats where these translocations are relatively rare. We aimed to show genome structural diversity and genome relationships in tetraploid, hexaploid and octoploid Avena species and amphiploids, establishing patterns of intergenomic translocations across different oat taxa using fluorescence in situ hybridization (FISH) with four well-characterized repetitive DNA sequences: pAs120, AF226603, Ast-R171 and Ast-T116. In A. agadiriana (2n=4x=28), the selected probes hybridized to all chromosomes indicating that this species originated from one (autotetraploid) or closely related ancestors with the same genomes. Hexaploid amphiploids were confirmed as having the genomic composition AACCDD, while octoploid amphiploids showed three different genome compositions: AACCCCDD, AAAACCDD or AABBCCDD. The A, B, C, and D genomes of oats differ significantly in their involvement in non-centromeric, intercalary translocations. There was a predominance of distal intergenomic translocations from the C- into the D-genome chromosomes. Translocations from A- to C-, or D- to C-genome chromosomes were less frequent, proving that at least some of the translocations in oat polyploids are non-reciprocal. Rare translocations from A- to D-, D- to A- and C- to B-genome chromosomes were also visualized. The fundamental research has implications for exploiting genomic biodiversity in oat breeding through introgression from wild species potentially with contrasting chromosomal structures and hence deleterious segmental duplications or large deletions in amphiploid parental lines.

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“…Probably not one, but several of the extant CCDD-tetraploids were involved in the formation of hexaploid oat species (Yan et al, 2021), but A. insularis and diploid species having As genome seem to be putative ancestors of oat hexaploids (Drossou et al, 2004; Badaeva et al, 2005; Peng et al, 2018; Fominaya et al, 2021; Jiang et al, 2021). Molecular cytogenetic analysis revealed that none of the modern diploid oat species having A or C genome was the direct ancestor of polyploids, however, A. insularis showed a relatively high number of transcribed spacers, displaying sequence similarity to one accession of A. hirtula (Loskutov et al, 2021). On the other hand, the principal coordinates analysis revealed that A. eriantha and A. longiglumis are closer to CCDD oat tetraploids than other diploids (Yan et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Oat chromosome and genome evolution defined by widespread terminal intergenomic translocations in polyploids

Tomaszewska¹,

Schwarzacher²,

Heslop-Harrison³

2022

Preprint

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Structural chromosome rearrangements involving translocations, fusions and fissions lead to evolutionary variation between species and potentially reproductive isolation and variation in gene expression. While the wheats (Triticeae, Poaceae) and oats (Aveneae) all maintain a basic chromosome number of x=7, genomes of oats show frequent intergenomic translocations, in contrast to wheats where these translocations are relatively rare. We aimed to show genome structural diversity and genome relationships in tetraploid, hexaploid and octoploid Avena species and amphiploids, establishing patterns of intergenomic translocations across different oat taxa using fluorescence in situ hybridization (FISH) with four well-characterized repetitive DNA sequences: pAs120, AF226603, Ast-R171 and Ast-T116. In A. agadiriana (2n=4x=28), the selected probes hybridized to all chromosomes indicating that this species originated from one (autotetraploid) or closely related ancestors with the same genomes. Hexaploid amphiploids were confirmed as having the genomic composition AACCDD, while octoploid amphiploids showed three different genome compositions: AACCCCDD, AAAACCDD or AABBCCDD. The A, B, C, and D genomes of oats differ significantly in their involvement in non-centromeric, intercalary translocations. There was a predominance of distal intergenomic translocations from the C- into the D-genome chromosomes. Translocations from A- to C-, or D- to C-genome chromosomes were less frequent, proving that at least some of the translocations in oat polyploids are non-reciprocal. Rare translocations from A- to D-, D- to A- and C- to B-genome chromosomes were also visualized. The fundamental research has implications for exploiting genomic biodiversity in oat breeding to through introgression from wild species potentially with contrasting chromosomal structures and hence deleterious segmental duplications or large deletions in amphiploid parental lines.

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The Origin and Resource Potential of Wild and Cultivated Species of the Genus of Oats (Avena L.)

Cited by 8 publications

References 114 publications

The comparison of polymorphism among Avena species revealed by retrotransposon-based DNA markers and soluble carbohydrates in seeds

The comparison of polymorphism among Avena species revealed by retrotransposon-based DNA markers and soluble carbohydrates in seeds

Oat chromosome and genome evolution defined by widespread terminal intergenomic translocations in polyploids

Oat chromosome and genome evolution defined by widespread terminal intergenomic translocations in polyploids

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