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Karyotypic studies in wild germplasm of Arachis (Leguminosae)

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Abstract

The karyomorphology for eight diploid species of Arachis belonging to three sections has been described for the first time, Sect. Extranervosae: A. macedoi (2n = 20m) and A. retusa (2n = 14m + 6sm); Sect. Heteranthae: A. sylvestris (2n = 16m + 4sm); Sect. Procumbentes: A. chiquitana (2n = 18m + 2sm); Sect. Arachis: A. cruziana (2n = 18m + 2sm), A. herzogii (2n = 18m + 2sm), A. simpsonii (2n = 20m) and A. williamsii (2n = 20m). A pair of satellited chromosomes was observed in all species. A chromosomes were found in A. chiquitana, A. herzogii and A. simpsonii. Karyotypic differences between sections were observed, but not enough to establish a characteristic karyotype pattern for each section. However, the species may be differentiated by the presence of A chromosomes, the type and position of satellites, and the karyotype formulae. These results are discussed with regard to karyotype evolution in Arachis to contribute to understanding the role of chromosome changes in the evolution of the genus.

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Acknowledgements

We thank J.F.M. Valls (CENARGEN-EMBRAPA) and C.E. Simpson (Texas Experiment Agricultural Station, TX, USA) for their courtesy in sending the seeds. This work was supported by grants from CONICET and Secretaría General de Ciencia y Técnica de la UNNE.

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Authors and Affiliations

  1. Miembros de la Carrera del Investigador Científico (CONICET), Instituto de Botánica del Nordeste, C.C. 209, 3400, Corrientes, Argentina

    Graciela I. Lavia & Aveliano Fernández

  2. Facultad de Ciencias Agrarias (UNNE), Instituto de Botánica del Nordeste, C.C. 209, 3400, Corrientes, Argentina

    Graciela I. Lavia

  3. Becaria de CONICET, Instituto de Botánica del Nordeste, C.C. 209, 3400, Corrientes, Argentina

    Alejandra M. Ortiz

  4. Facultad de Ciencias Exactas y Naturales y Agrimensura (UNNE), Instituto de Botánica del Nordeste, C.C. 209, 3400, Corrientes, Argentina

    Aveliano Fernández

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  1. Graciela I. Lavia
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  2. Alejandra M. Ortiz
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  3. Aveliano Fernández
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Correspondence to Graciela I. Lavia.

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Lavia, G.I., Ortiz, A.M. & Fernández, A. Karyotypic studies in wild germplasm of Arachis (Leguminosae). Genet Resour Crop Evol 56, 755–764 (2009). https://doi.org/10.1007/s10722-008-9399-6

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  • DOI: https://doi.org/10.1007/s10722-008-9399-6

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