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dc.contributor.author Grabiele, Mauro
dc.contributor.author Honfi, Ana Isabel
dc.contributor.author Cerutti, Juan Carlos
dc.contributor.author Fernández, Virginia
dc.contributor.author Franco, Deidamia
dc.contributor.author Daviña, Julio Rubén
dc.date.available 2018-09-06T20:54:38Z
dc.date.issued 2010-03
dc.identifier.citation Grabiele, Mauro; Honfi, Ana Isabel; Cerutti, Juan Carlos; Fernández, Virginia; Franco, Deidamia; et al.; Cytogenetic analysis in the terrestrial orchid Sacoila argentina (Griseb.) Garay from Paraguay; Academia Sinica; Botanical Studies; 51; 3-2010; 337-342
dc.identifier.issn 1817-406X
dc.identifier.uri http://hdl.handle.net/11336/58634
dc.description.abstract Sacoila argentina (Griseb.) Garay is a terrestrial orchid with ornamental value found in northern Argentina, Bolivia, and Paraguay and is considered an object of conservation within the Paraguayan Chaco region, only found at Boquerón Department and chromosomally unknown until this study. Here, we present another natural population of Sacoila argentina for Paraguay (Paraguarí Department, Villa Florida, 57º07’48.71” W - 26º23’32.16” S) so extending its area of distribution. Conventional cytogenetic techniques were applied in order to analyze its genetic system. Sacoila argentina is a diploid species with 2n = 2x = 46 small size chromosomes (1.21 - 4.45 µm) and 40.63 µm per haploid genome. Its karyotype, composed of 38m + 8sm, is bimodal (A2=0.36/R=3.69) due to a pair (# 20, sm) that is more than two times larger than the mean length of the chromosome (1.77 µm), and symmetric (A1=0.18/i=44.58/r>2=0.13) belonging to Stebbins category 2B. The chromosome pair # 20 also carries a terminal macrosatellite on its short arm with an active NOR. Sporogenesis is normal and pollen grain viability is high (80%). Meiotic behaviour is regular and chromosomes pair up as 23 bivalents in the male (pollen mother cells, PMC) as they do in the female meiosis (megaspore mother cells, MMCs), confirming the basic number x = 23 for Sacoila. In PMCs and MMCs at diakinesis/metaphase I, ring bivalents (80%) with distal chiasmata (85%) are common, and the mean of chiasmata per bivalent is high (1.80) in both germinal lines. The recombination index, affected by the meiotic number (n = 23) and the mean of chiasmata/cell (41.5) is high (RI=64.5). Natural populations of Sacoila argentina possess low density, are scarce, interspersed and just found at flowering time. For these reasons, it is a rarely collected species.
dc.format application/pdf
dc.language.iso eng
dc.publisher Academia Sinica
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject Chromosomes
dc.subject Genetic System
dc.subject Orchidaceae
dc.subject Sacoila argentina
dc.subject.classification Otras Ciencias Biológicas
dc.subject.classification Ciencias Biológicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Cytogenetic analysis in the terrestrial orchid Sacoila argentina (Griseb.) Garay from Paraguay
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2018-08-30T14:36:41Z
dc.journal.volume 51
dc.journal.pagination 337-342
dc.journal.pais China
dc.journal.ciudad Taiwn
dc.description.fil Fil: Grabiele, Mauro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales; Argentina
dc.description.fil Fil: Honfi, Ana Isabel. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil Fil: Cerutti, Juan Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales; Argentina
dc.description.fil Fil: Fernández, Virginia. Universidad Nacional de Asunción. Facultad de Ciencias Exactas y Naturales; Paraguay
dc.description.fil Fil: Franco, Deidamia. Universidad Nacional de Asunción. Facultad de Ciencias Exactas y Naturales; Paraguay
dc.description.fil Fil: Daviña, Julio Rubén. Universidad Nacional de Misiones. Facultad de Ciencias Exactas, Químicas y Naturales; Argentina
dc.journal.title Botanical Studies
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/https://ejournal.sinica.edu.tw/bbas/content/2010/3/Bot513-07.pdf
dc.conicet.fuente individual


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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)