Chromosome studies in Orchidaceae from Argentina

Genetics and Molecular Biology

Julio Rubén Daviña¹  Mauro Grabiele¹  Juan Carlos Cerutti¹  Diego Hernán Hojsgaard¹  Rubén Dario Almada¹  Irma Stella Insaurralde¹  Ana Isabel Honfi¹ 

[1] ,Universidad Nacional de Misiones Programa de Estudios Florísticos y Genética Vegetal Posadas,Argentina

关键词: chromosome number;    karyotype features;    polyploidy;    karyology;    orchids;    South America;   

DOI  :  10.1590/S1415-47572009005000089

来源: SciELO

【 摘 要 】

The center of diversity of Argentinean orchids is in the northeast region of the country. Chromosome numbers and karyotype features of 43 species belonging to 28 genera are presented here. Five chromosome records are the first ones at the genus level; these taxa are Aspidogyne kuckzinskii (2n = 42), Eurystyles actinosophila (2n = 56), Skeptrostachys paraguayensis (2n = 46), Stigmatosema polyaden (2n = 40) and Zygostates alleniana (2n = 54). In addition, a chromosome number is presented for the first time for 15 species: Corymborkis flava (2n = 56), Cyclopogon callophyllus (2n = 28), C. oliganthus (2n = 64), Cyrtopodium hatschbachii (2n = 46), C. palmifrons (2n = 46), Galeandra beyrichii (2n = 54), Habenaria bractescens (2n = 44), Oncidium edwallii (2n = 42), O. fimbriatum (2n = 56), O. pubes (2n = 84), O. riograndense (2n = 56), Pelexia ekmanii (2n = 46), P. lindmanii (2n = 46) and Warrea warreana (2n = 48). For Oncidium longicornu (2n = 42), O. divaricatum (2n = 56) and Sarcoglottis fasciculata (2n = 46+1B?, 46+3B?), a new cytotype was found. Chromosome data support phylogenetic relationships proposed by previous cytological, morphologic and molecular analyses, and in all the cases cover some gaps in the South American literature on orchid chromosomes.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License