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Morphology, reproduction and karyology in the rare Andean Poa gymnantha

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Abstract:

We report agamic reproduction in Poa gymnantha, an endemic species from the high Andes of Peru, Bolivia and Chile, known only from pistillate plants. This is the first description of apomixis in Poa from South America. The species is a decaploid (2n = 10x = 70) with a basic karyotype formula of 4 m + 3 sm chromosomes. Diagnostic characters, geographic distribution and taxonomic circumscription of the species are given, along with illustrations. The paper contributes to a better understanding of floral morphology and reproduction in this agamic taxon.

Keywords: APOMIXIS; CHROMOSOME NUMBER; KARYOTYPE; POA GYMNANTHA; POACEAE; PUNAPOA; REPRODUCTION; TAXONOMY

Document Type: Research Article

Affiliations: 1: Departamento de Botánica, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Casilla 160-C, Concepción, Chile 2: Instituto Multidisciplinario de Biología Vegetal (CONICET-Universidad Nacional de Córdoba), Casilla de Correo 495, 5000 Córdoba, Argentina

Publication date: February 1, 2008

iapt/tax/2008/00000057/00000001/art00016
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