Genome differentiation in Aegilops . 4. Evolution of the U-genome cluster

Бадаева, Е. Д.; Amosova, Аlexandra V.; Samatadze, Tatiana E.; Zoshchuk, Svyatoslav A.; Shostak, N. G.; Chikida, N. N.; Zelenin, A. V.; Raupp, W. J.; Friebe, Bernd; Gill, Bikram S.

doi:10.1007/s00606-003-0072-4

Cited by 121 publications

(136 citation statements)

References 51 publications

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“…The C-banding patterns of the three A. biuncialis accessions were generally similar to those of the A. biuncialis accessions reported by Badaeva et al (2004), which belonged to type II chromosomes. For the individual component genomes, U b had intense centromere bands.…”

Section: Discussionsupporting

confidence: 75%

“…genome is donated by an A. umbellulata diploid progenitor (2n = 2x = 14, UU), whereas the modified M b genome is donated by A. comosa (2n = 2x = 14, MM) (Resta et al, 1996;Badaeva et al, 2004). Some A. biuncialis accessions are highly resistant to barley yellow dwarf disease (Makkouk et al, 1994), and others have superior rust resistance (Dhaliwal et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Using 27 accessions of diverse origin, Badaeva (2002) and Badaeva et al (2004) have reported detailed C-banding karyotype and FISH patterns in A. biuncialis. However, these authors failed to show the FISH patterns of the investigated chromosomes graphically.…”

Section: Introductionmentioning

confidence: 99%

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Methodology Molecular cytogenetic characterization of the Aegilops biuncialis karyotype

Wang

W²,

Zhao³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. Aegilops biuncialis can be hybridized with wheat (Triticum spp) and has been used for wheat breeding and genetic studies. The , with a karyotype formula of 2n = 4x = 28 = 14m + 10sm + 4st. Fluorescence in situ hybridization (FISH) and C-banding approaches were used to analyze the A. biuncialis accession chromosomes at the mitotic stage. Based on the C-banding and FISH patterns, all U b and M b chromosomes could be discriminated simultaneously; the three A. biuncialis accessions exhibited similar patterns, suggesting a common origin. The U b genome from A. biuncialis resembled the U genome in the diploid species A. umbellulata, and it may be related to the tetraploid species containing the U genome. The M b genome had some differences compared to the M genome in the diploid species A. comosa, and it may be related to the tetraploid species possessing the M genome. A generalized ideogram was proposed for the A. biuncialis genome, which could be useful for standardized and accurate identification of the A. biuncialis karyotype and chromosomes.

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Section: Discussionsupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

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Methodology Molecular cytogenetic characterization of the Aegilops biuncialis karyotype

Wang

W²,

Zhao³

et al. 2013

Genet. Mol. Res.

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“…All lines were grown in the greenhouse. The ploidy levels of Aegilops crassa and Aegilops neglecta accessions were determined by Badaeva et al (1998Badaeva et al ( , 2001) and this research. Critical accessions were identified by C banding (Gill et al, 1991) when necessary.…”

Section: Plant Materialsmentioning

confidence: 70%

Recurrent Deletions of Puroindoline Genes at the GrainHardnessLocus in Four Independent Lineages of Polyploid Wheat

Huang

Gill

2007

Plant Physiology

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Polyploidy is known to induce numerous genetic and epigenetic changes but little is known about their physiological bases. In wheat, grain texture is mainly determined by the Hardness (Ha) locus consisting of genes Puroindoline a (Pina) and b (Pinb). These genes are conserved in diploid progenitors but were deleted from the A and B genomes of tetraploid Triticum turgidum (AB). We now report the recurrent deletions of Pina-Pinb in other lineages of polyploid wheat. We analyzed the Ha haplotype structure in 90 diploid and 300 polyploid accessions of Triticum and Aegilops spp. Pin genes were conserved in all diploid species and deletion haplotypes were detected in all polyploid Triticum and most of the polyploid Aegilops spp. Two Pina-Pinb deletion haplotypes were found in hexaploid wheat (Triticum aestivum; ABD). Pina and Pinb were eliminated from the G genome, but maintained in the A genome of tetraploid Triticum timopheevii (AG). Subsequently, Pina and Pinb were deleted from the A genome but retained in the A m genome of hexaploid Triticum zhukovskyi (A m AG). Comparison of deletion breakpoints demonstrated that the Pina-Pinb deletion occurred independently and recurrently in the four polyploid wheat species. The implications of Pina-Pinb deletions for polyploid-driven evolution of gene and genome and its possible physiological significance are discussed.

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“…The most pronounced differences in the chromosomal structure concern the A genome of T. urartu relative to bread wheat, including the intensively labelled nOr regions of chromosomes 1 and 5, which were eliminated in durum and bread wheat after polyploidization (Jiang and Gill 1994). The inactivation of major nOrs was also observed after the formation of the allopolyploid Aegilops species (Badaeva et al 2004;Molnár et al 2011a;Feldman et al 2012). The difference in the hybridization pattern of chromosome 4A between T. urartu and bread wheat is due to the pericentric inversion of 4A and translocations involving chromosomes 5A and 7B, which occurred at the polyploid level (Hernandez et al 2012).…”

Section: Discussionmentioning

confidence: 94%

Flow cytometric chromosome sorting from diploid progenitors of bread wheat, T. urartu, Ae. speltoides and Ae. tauschii

et al. 2014

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Genome differentiation in Aegilops . 4. Evolution of the U-genome cluster

Cited by 121 publications

References 51 publications

Methodology Molecular cytogenetic characterization of the Aegilops biuncialis karyotype

Methodology Molecular cytogenetic characterization of the Aegilops biuncialis karyotype

Recurrent Deletions of Puroindoline Genes at the GrainHardnessLocus in Four Independent Lineages of Polyploid Wheat

Flow cytometric chromosome sorting from diploid progenitors of bread wheat, T. urartu, Ae. speltoides and Ae. tauschii

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