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      EL CARIOTIPO DE CHAETANTHERA INCANA POEPP. EX LESS. (ASTERACEAE) Translated title: THE KARYOTYPE OF CHAETANTHERA INCANA POEPP. EX LESS. (ASTERACEAE)

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          Translated abstract

          The karyotype oí Chaetanthera incana Poepp. ex Less, from Chile was examined. This species belong to the subgenus Chaetanthera. The species has 2n = 2x = 22 chromosomes, with 10m + Ism chromosomes. The reported karyotype is symmetric (Asi % = 56.0). These results were compared with Ch. chilensis and Ch. ciliata.

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          A New Method for Estimating Karyotype Asymmetry

          Carlos Zarco (1986)
          Article 0 comments Cited 95 times – based on 0 reviews     Review now
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            Genome size evolution in holoparasitic Orobanche (Orobanchaceae) and related genera

            H. Weiss-Schneeweiss, G Schneeweiss, J Greilhuber (2006)
            Article 0 comments Cited 23 times – based on 0 reviews     Review now
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              Phylogeny of Chaetanthera (Asteraceae: Mutisieae) reveals both ancient and recent origins of the high elevation lineages.

              Charles J.M. Bell, L. Hinojosa, Mary Arroyo … (2006)
              Penalized likelihood analysis of previously published chloroplast DNA (cpDNA) ndhF sequences suggests that the central-southern Andean genus Chaetanthera diverged ca. 16.5 million years (my) ago, well before the uplift of the Andes to their present heights. Penalized likelihood analysis based on new nuclear ribosomal DNA (rDNA) internal transcribed spacer (ITS) sequences indicates that the most relictual lineages occupy high elevation Andean habitats that did not exist until some 10my later. This result is contrary to the expectation that younger habitats should be occupied by phylogenetically younger lineages. The results are interpreted with respect to the development of aridity in lowland habitats during the Miocene and Pliocene, which presumably extinguished the lowland relatives of the high elevation taxa or, in effect, forced them upwards in search of adequate moisture. As the more northerly lineages were being displaced upward, others diversified in the mediterranean-type climate area of central Chile, giving rise to additional high elevation taxa again, at an early date, as well as lowland taxa. Some species of Chaetanthera from lowland central Chile appear as the phylogenetically youngest taxa, suggesting secondary adaptation to lowland aridity. At the same time, at least two high elevation species, Chaetanthera peruviana and Chaetanthera perpusilla, appear to have been derived recently from a lower elevation ancestor, while some middle to low elevation taxa seem to have evolved recently out of a high elevation complex. The results suggest that the younger high elevation habitats have served as both "cradle" and "museum" for Chaetanthera lineages.
              Article 0 comments Cited 19 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (publisher-id): gbot
                Title: Gayana. Botánica
                Abbreviated Title: Gayana Bot.
                Publisher: Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción (Concepción, , Chile )
                ISSN (Print): 0016-5301
                ISSN (Electronic): 0717-6643
                Publication date (Print and electronic): 2008
                Volume: 65
                Issue: 2
                Pages: 237-240
                Affiliations
                [01] Concepción orgnameUniversidad de Concepción orgdiv1Departamento de Botánica Chile cbaeza@ 123456udec.cl
                Article
                Publisher ID: S0717-66432008000200011 Publisher ID: S0717-6643(08)06500211
                SO-VID: eb666e6c-d368-497b-9060-30ab68ae3711
                License:

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                Date received : 26 March 2008
                Date accepted : 16 June 2008
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 16, Pages: 4
                Product

                SciELO Chile

                Categories
                Subject: COMUNICACIONES BREVES

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