Karyological studies in Deschampsia antarctica Desv. (Poaceae)

Deschampsia antarctica Desv. (Poaceae), known as Antarctic hairgrass, is the only grass species and one of the two vascular plant species native to Antarctica and it is a valuable source for gene discovery associated with freezing-tolerance. In this work the karyotype of D. antarctica collected near...

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Bibliographic Details
Main Authors: Cardone, S., Sawatani, P., Rush, P., García, A.M., Poggio, L., Schrauf, G.
Format: Journal/Newspaper
Language:unknown
Subjects:
Aneusomaty
Chromosomes
Deschampsia antarctica
Karyotype
agronomy
chromosome
cytogenetics
freeze tolerance
grass
karyology
native species
new record
phylogenetics
reproductive strategy
Poaceae
Tracheophyta
Antarc*
Antarctic
Antarctica
Online Access:https://hdl.handle.net/20.500.12110/paper_07224060_v32_n3_p427_Cardone
Description
Summary:Deschampsia antarctica Desv. (Poaceae), known as Antarctic hairgrass, is the only grass species and one of the two vascular plant species native to Antarctica and it is a valuable source for gene discovery associated with freezing-tolerance. In this work the karyotype of D. antarctica collected near Jubany Antarctic Base was reported for the first time. This species presents a chromosome number of 2n = 2x = 26, with karyotypic formula 10m + 6sm + 8st + 2t. The nucleolar organizer region is located in the short arm in one of the submetacentric pairs forming a terminal satellite. Aneusomaty, a phenomenon already reported in the genus, was detected during this study. The cytogenetic information, together with the recent phylogenetic data will be useful for breeding strategies in agronomically valuable crops. © 2008 Springer-Verlag. Fil:Sawatani, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:García, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Poggio, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.

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