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Use of the synthetic Oligo-pTa535 and Oligo-pAs1 probes for identification of Hordeum chilense-origin chromosomes in hexaploid tritordeum

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Abstract

The synthetic oligonucleotide probes Oligo-pTa535 and Oligo-pAs1 were previously developed by other authors based on the repetitive sequences of clones pTa535 and pAs1 available in GenBank, and have been used as probes in fluorescence in situ hybridization (FISH) experiments allowing the identification of wheat and rye chromosomes. Their suitability as nondenaturing fluorescence in situ hybridization (ND-FISH) probes turned the hybridization procedure less time consuming, easier and more affordable. Contrastingly to conventional FISH, ND-FISH does not require DNA denaturing, preserving the chromosomal morphology and being adequate for successive hybridizations on the same chromosome spread. In this study, we hybridized, for the first time, the Oligo-pTa535 and Oligo-pAs1 probes on mitotic chromosomes of hexaploid tritordeum using ND-FISH. Tritordeum (HchHchAABB) is the synthetic amphiploid resultant from crosses between wild barley (HchHch) and cultivated durum wheat (AABB). Both Oligo-pTa535 and Oligo-pAs1 hybridized on all H. chilense-origin chromosomes of tritordeum, allowing their identification and the construction of an ideogram based on their hybridization patterns and on the physical location of the 45S ribosomal DNA (rDNA) loci detected by pTa71. We are confident that this ideogram will be further useful for the identification of H. chilense-origin chromosomes in other tritordeum lines or allopolyploids involving the Hch-genome.

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Acknowledgments

This work was partially funded by the International Consortium HY-WHEAT (P-KBBE/AGRGPL/0002/2010), supported by the Portuguese Foundation for Science and the Technology (“Fundação para a Ciência e a Tecnologia” - FCT), “Programa Operacional de Factores Competitividade” (COMPETE), “Quadro de Referência Estratégico Nacional 2007–2013″ (QREN), and “Fundo Europeu de Desenvolvimento Regional” (FEDER) of European Union; and by the project AGL2013-43329-R supported by “Ministerio de Economía y Competitividad” of Spain.

Funding

This work was partially supported by the International Consortium HY-WHEAT (P-KBBE/AGRGPL/0002/2010), funded by the Portuguese Foundation for Science and the Technology (“Fundação para a Ciência e a Tecnologia” - FCT), “Programa Operacional de Factores Competitividade” (COMPETE), “Quadro de Referência Estratégico Nacional 2007–2013″ (QREN), and “Fundo Europeu de Desenvolvimento Regional” (FEDER) of European Union; and by the project AGL2013-43329-R funded by “Ministerio de Economía y Competitividad” of Spain.

Authors’ contribution

The authors have made the following declarations regarding their contributions: Conceived and designed the experiments: JLB and AC. Performed the experiments: AD and AC. Analyzed the data: AD, AC, JLB. Contributed with plant material/reagents/analysis tools: ACM, AM, JLB. Contributed to the writing of the manuscript: all authors.

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Authors and Affiliations

  1. University of Tras-os-Montes and Alto Douro, 5001-801, Vila Real, Portugal

    Andreia Delgado

  2. Faculty of Sciences, BioISI – Biosystems & Integrative Sciences Institute, University of Lisbon, C8 BDG, Campo Grande, Lisbon, Portugal

    Ana Carvalho & José Lima-Brito

  3. CSIC – Consejo Superior de Investigaciones Científicas, Córdoba, Spain

    Azahara Carmen Martín & Antonio Martín

  4. John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK

    Azahara Carmen Martín

  5. Departament of Genetics and Biotechnology, University of Tras-os-Montes and Alto Douro, 5001-801, Vila Real, Portugal

    José Lima-Brito

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  1. Andreia Delgado
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  2. Ana Carvalho
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  3. Azahara Carmen Martín
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  4. Antonio Martín
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  5. José Lima-Brito
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Correspondence to José Lima-Brito.

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Delgado, A., Carvalho, A., Martín, A.C. et al. Use of the synthetic Oligo-pTa535 and Oligo-pAs1 probes for identification of Hordeum chilense-origin chromosomes in hexaploid tritordeum. Genet Resour Crop Evol 63, 945–951 (2016). https://doi.org/10.1007/s10722-016-0402-3

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  • DOI: https://doi.org/10.1007/s10722-016-0402-3

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