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Karyotype analyses in three Patagonian and S. Andean endemic genera ofNicotianeae (Solanaceae)

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Abstract

The somatic chromosomes and karyotypes of threeNicotianeae have been studied for the first time. All of them have 2n = 2x = 22 and symmetrical karyotypes.Benthamiella pycnophylloides has 9 m pairs + 1 sm pair + 1 st pair; pairs 2, 4, 5, and 11 bear microsatellites.Combera paradoxa andPantacantha ameghinoi have 9 m pairs + 2 sm pairs; pair 11 ofC. paradoxa is satellited, while pair 9 ofP. ameghinoi bears microsatellites and shows a pericentric inversion in heterozygous state in 20% of the seedlings. Results are compared with previous chromosome reports for the tribe. The cytological data support their present position in the family system. Besides,Benthamiella, Combera andPantacantha appear to be primitive genera ofNicotianeae, a comparatively advanced tribe within the family.

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Authors and Affiliations

  1. Instituto Multidisciplinario de Biología Vegetal (IMBIV), Casilla de Correo 495, 5000, Córdoba, Argentina

    Eduardo A. Moscone

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  1. Eduardo A. Moscone
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Chromosome studies onNicotianeae (Solanaceae) 1.

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Moscone, E.A. Karyotype analyses in three Patagonian and S. Andean endemic genera ofNicotianeae (Solanaceae). Pl Syst Evol 166, 31–39 (1989). https://doi.org/10.1007/BF00937873

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  • DOI: https://doi.org/10.1007/BF00937873

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