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Chromosome number and ploidy level of some South American species of Schizachyrium (Poaceae, Andropogoneae)

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Abstract

Chromosome numbers are reported here for 53 accessions belonging to 13 taxa of the genus Schizachyrium. The chromosome counts for the following seven species are recorded here for the first time: S. bimucronatum (2n = 20), S. gracilipes (2n = 20), S. hatschbachii (2n = 20), S. lactiflorum (2n = 20), S. plumigerum (2n = 20), S. salzmannii (2n = 20; 2n = 40) and S. spicatum (2n = 20). Counts differing from those previously reported are given for two species: S. scabriflorum (2n = 20 and 80) and S. tenerum (2n = 40). Most of the analyzed species of this genus are diploids. The occurrence of polyploidy in S. glaziovii, S. lactiflorum, S. salzmanni, S. scabriflorum and S. tenerum is reported here for the first time. Data on chromosome numbers and ploidy levels are discussed in relation to the taxonomy and evolution of the genus.

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Acknowledgments

The authors wish to thank Dr. Massimiliano Dematteis, Prof. Zúlma Rúgolo de Agrasar and Ing. Agr. Camilo Quarín for helpful suggestions and comments on the manuscript. We also thank to Dr. Diego Hojsgaard for his laboratory assistence. This work was supported by grants from Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and from Agencia Nacional de Promoción Científica, Tecnológica y de Innovación (ANPCyT- FONCyT, PICTO 07-90).

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  1. Facultad de Ciencias Agrarias (UNNE), Instituto de Botánica del Nordeste (UNNE-CONICET), Sargento Cabral 2131. C.C. 209, 3400, Corrientes, Argentina

    Myriam C. Peichoto, Florencia Galdeano, Maria M. Arbo & Viviana G. Solís Neffa

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  1. Myriam C. Peichoto
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  2. Florencia Galdeano
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  3. Maria M. Arbo
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  4. Viviana G. Solís Neffa
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Correspondence to Viviana G. Solís Neffa.

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Peichoto, M.C., Galdeano, F., Arbo, M.M. et al. Chromosome number and ploidy level of some South American species of Schizachyrium (Poaceae, Andropogoneae). Plant Syst Evol 292, 63–71 (2011). https://doi.org/10.1007/s00606-010-0403-1

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