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      Alstroemeria presliana Herb. (Alstroemeriaceae) in Chile from a Cytogenetic Perspective Translated title: Alstroemeria presliana Herb. (Alstroemeriaceae) en Chile Bajo una Perspectiva Citogenética

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          Abstract

          Alstroemeria (Alstroemeriaceae) is an endemic genus of South America with two major distribution centers in the continent: Chile and Brazil. In Chile the genus is distributed from the North, near Iquique (20º13’ S, 70º09’ W) to the Chilean and Argentine Patagonia (53º10’ S, 70º54’ W). The central zone of Chile presents the highest number of species. A. presliana Herb. grows from Curicó (34º59’ S, 71º14’ W) to Cautín (38º45’ S, 72º34’ W) in Chile and Neuquén (36º50’ S, 71º05’ W), Argentina. A comparative karyotype study was made between a population of A. presliana subsp. presliana and a population of A. presliana subsp. australis Ehr. Bayer. Both populations presented asymmetric karyotypes, with 2n = 2x = 16 chromosomes, but with different chromosome formulae: A. presliana subsp. presliana has a haploid formula with 4m + 1sm-sat + 1st-sat + 2t, i.e., four pairs ofmetacentric chromosomes, one submetacentric pair with satellite, one subtelocentric pair with satellite, and two telocentrics pairs. A. presliana subsp. australis has a formula with 2m + 1m-sat + 1sm + 4t chromosomes, i.e., two pairs of metacentric chromosomes, one metacentric pair with satellite, one submetacentric pair, and four telocentrics chromosomes. These results indicated that the karyotype of the subspecies is very different, and it would be possible to recognize A. presliana subsp. australis as a new species.

          Translated abstract

          Alstroemeria (Alstroemeriaceae) es un género endémico de Sudamérica y presenta dos grandes centros de distribución: Chile y Brasil. En Chile se distribuye desde el norte, cerca de Iquique (20º13’ S, 70º09’ O) hasta la Patagonia (53º10’ S, 70º54’ O). La zona central del país presenta el mayor número de especies. A. presliana Herb. crece con una distribución que va desde Curicó (34º59’ S, 71º14’ O) a Cautín (38º45’ S, 72º34’ O) en Chile y en la Provincia de Neuquén (36º50’ S, 71º05’ O), Argentina. Se hizo un estudio comparativo del cariotipo de A. presliana subsp. presliana con A. presliana subsp. australis Ehr. Bayer. Las dos poblaciones presentaron un cariotipo asimétrico, con 2n = 2x = 16 cromosomas, pero con cromosomas diferentes: A. presliana subsp. presliana presenta una fórmula haploide 4m + 1sm-sat + 1st-sat + 2t, esto es, cuatro pares de cromosomas metacéntricos, un par submetacéntrico con el satélite, un par subtelocéntrico con el satélite y dos pares telocéntricos. En cambio, A. presliana subsp. australis tiene una fórmula haploide constituida por 2m + 1m-sat + 1sm + 4t, esto es, dos pares de cromosomas metacéntricos, un par metacéntrico con satélite, un par submetacéntrico y cuatro pares de cromosomas telocéntricos. Estos resultados evidencian que el cariotipo entre las subespecies es muy diferente, lo que podría estar indicando que la subespecie australis correspondería a una nueva especie dentro del género.

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          Most cited references22

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          Die gattung Alstroemeria in Chile

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            MicroMeasure: a new computer program for the collection and analysis of cytogenetic data.

            The ability to identify individual chromosomes in cytological preparations is an essential component of many investigations. While several computer software applications have been used to facilitate such quantitative karyotype analysis, most of these programs are limited by design for specific types of analyses, or can be used only with specific hardware configurations. MicroMeasure is a new image analysis application that may be used to collect data for a wide variety of chromosomal parameters from electronically captured or scanned images. Unlike similar applications, MicroMeasure may be individually configured by the end user to suit a wide variety of research needs. This program can be used with most common personal computers, and requires no unusual or specific hardware. MicroMeasure is made available to the research community without cost by the Department of Biology at Colorado State University via the World Wide Web at http://www.biology.colostate.edu/MicroMeasure.
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              Chromosome studies in Andean taxa of Alstroemeria (Alstroemeriaceae)

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                chiljar
                Chilean journal of agricultural research
                Chilean J. Agric. Res.
                Instituto de Investigaciones Agropecuarias, INIA (Chillán )
                0718-5839
                December 2008
                : 68
                : 4
                : 328-333
                Affiliations
                [1 ] Universidad de Concepción Chile
                [2 ] Federal Centre for Breeding Research on Cultivated Plants Germany
                Article
                S0718-58392008000400002
                10.4067/S0718-58392008000400002
                e9c2c8ab-f939-462f-ae87-f207a7b14f33

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Chile

                Self URI (journal page): http://www.scielo.cl/scielo.php?script=sci_serial&pid=0718-5839&lng=en
                Categories
                AGRICULTURE, MULTIDISCIPLINARY
                AGRONOMY

                General agriculture,Horticulture
                Alstroemeriaceae,karyotype,chromosome numbers,Chile,cariotipo,número cromosómico

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