Author
Carlos Romero Zarco
Bio: Carlos Romero Zarco is an academic researcher from University of Seville. The author has contributed to research in topics: Juncaceae & Medicine. The author has an hindex of 8, co-authored 27 publications receiving 770 citations.
Topics: Juncaceae, Medicine, Tribe (biology), Luzula, Typhus
Papers
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TL;DR: Two numerical parameters are used to estimate the karyotype asymmetry in twenty-two taxa of the tribe Aveneae (Gramineae) from the Iberian Peninsula and Baleares and when karyograms or idiograms are available.
Abstract: Summary Two numerical parameters are used to estimate the karyotype asymmetry in twenty-two taxa of the tribe Aveneae (Gramineae) from the Iberian Peninsula and Baleares. The new method is useful when there are only slight differences in karyotype asymmetry and when karyograms or idiograms are available.
675 citations
01 Dec 1985
TL;DR: Morphology, leaf Anatomy and Caryology of Arrhenatherum taxa (Gramineae) from Iberian Peninsula are studied and species delimitation and natural hybrids are discussed.
Abstract: espanolSe estudia la morfologia, anatomia foliar y cariologia de los taxones del genero Arrhenatherum Beauv. (Gramineae) de 1a Peninsula Iberica. Se reconocen seis taxones agrupados en dos especies. Se describe A. elatius subsp. baeticum Romero Zarco y se separan en A. album (Vahl) W.D.Clayton dos variedades, proponiendose una nueva combinacion, A. album var. erianthum (Boiss. e Reuter) Romero Zarco. Para cada taxon se indican sinonimia, distribucion y, cuando ha sido posible, tipificacion. Se discuten la delimitacion de las especies y los hibridos naturales. EnglishMorphology, leaf Anatomy and Caryology of Arrhenatherum taxa (Gramineae) from Iberian Peninsula are studied. Six taxa arranged in two species are recognized. A. elatius subsp. baeticum Romero Zarco is described, and two varieties are recognized in A. album (Vahl) W.D. Clayton, proposing a new combination, A. album var. erianthum (Boiss. E Reuter) Romero Zarco. Synonymy, distribution and, when posible, typification, are given far every taxa. Species delimitation and natural hybrids are discussed.
20 citations
01 Jan 1985
TL;DR: Cariology, foliar anatomy and taxonomy of the species of Pseudarrhenatherum Rouy (Gramineae) from the Iberian Peninsula have been studied which provide additional evidence for the separation of this genus within the tribe Aveneae Nees.
Abstract: espanolSe estudia la Cariologia, Anatomia foliar y Taxonomia de dos especies del genero Pseudarrhenatherum Rouy (P. longifolium y P. pallens). Se aportan nuevas pruebas para la delimitacion taxonomica del genero dentro de la tribu Avenae Nees y para la separacion de sus especies. Para cada una de ellas se indica sinonimia, descripcion y distribucion EnglishCariology, foliar anatomy and taxonomy of the species of Pseudarrhenatherum Rouy (Gramineae) from the Iberian Peninsula (P. longifolium and P. pallens) have been studied which provide additional evidence for the separation of this genus within the tribe Aveneae Nees, as well as for the delimitation of both species. For each species, the correct name, synonymy, description and distribution are provided.
12 citations
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TL;DR: Two numerical parameters are used to estimate the karyotype asymmetry in twenty-two taxa of the tribe Aveneae (Gramineae) from the Iberian Peninsula and Baleares and when karyograms or idiograms are available.
Abstract: Summary Two numerical parameters are used to estimate the karyotype asymmetry in twenty-two taxa of the tribe Aveneae (Gramineae) from the Iberian Peninsula and Baleares. The new method is useful when there are only slight differences in karyotype asymmetry and when karyograms or idiograms are available.
675 citations
TL;DR: The investigation of seven different methods of evaluating karyotype asymmetry reveals that the intervals used by Stebbins to separate the different types of karyotypes are very broad and only one quantitative parameter, the A2 index, correctly describes the variation in chromosome length in a complement.
Abstract: In literature seven different methods of evaluating karyotype asymmetry – the TF%, the As K%, Stebbins' classification, the Rec and the Syi, the A1 and the A2, the DI, and the A – are used for the elucidation of phylogenetic relationships and taxonomic treatments within a particular group or taxon The investigation of these seven methods reveals that the intervals used by Stebbins to separate the different types of karyotype asymmetry are very broad and only one quantitative parameter, the A2 index, correctly describes the variation in chromosome length in a complement A new asymmetry index (AI) is proposed to measure karyotype asymmetry and a new parameter, the CVCI, is offered, that precisely assesses the relative variation in centromere position in a complement The AI index, the CVCI and the CVCL (=A2 × 100) have the potential to display even minor karyotypic variations Thus, these three indices together increase the precision of results in comparison with other existing methods All this has important consequences as regards the interpretation of the results of karyological studies
303 citations
28 Dec 2012
TL;DR: Kamari et al. as discussed by the authors published a series of reports of chromosomes numbers from Mediterranean area, peri-Alpine communities and the Atlantic Islands, in English or French language.
Abstract: Kamari, G., Blanche, C. & Siljak-Yakovlev, S. (eds): Mediterranean chromosome number reports – 22. — Fl. Medit. 22: 211-232. 2012. — ISSN: 1120-4052 printed, 2240-4538 online. This is the twenty-two of a series of reports of chromosomes numbers from Mediterranean area, peri-Alpine communities and the Atlantic Islands, in English or French language. It comprises contributions on 15 taxa: Cakile, Chrithmum, Dorycnium, Inula, Reichardia and Pancratium from Greece by E. Liveri, P. Bareka & G. Kamari (Nos 1753-1758); Pimpinella from Turkey by
219 citations
TL;DR: This work addresses a critical review of the methods so far proposed for estimation of karyotype asymmetry, using both artificial and real chromosome datasets, and shows definitively what and how to measure to correctly infer karyotypes asymmetry.
Abstract: One of the most popular, cheap and widely used approaches in comparative cytogenetics – especially by botanists – is that concerning intrachromosomal and interchromosomal karyotype asymmetry. Currently, there is no clear indication of which method, among the many different ones reported in literature, is the most adequate to infer karyotype asymmetry (especially intrachromosomal), above all in view of the criticisms recently moved to the most recent proposal published. This work addresses a critical review of the methods so far proposed for estimation of karyotype asymmetry, using both artificial and real chromosome datasets. It is shown once again how the concept karyotype of asymmetry is composed by two kinds of estimation: interchromosomal and intrachromosomal asymmetries. For the first one, the use of Coefficient of Variation of Chromosome Length, a powerful statistical parameter, is here confirmed. For the second one, the most appropriate parameter is the new Mean Centromeric Asymmetry, where Centromeric Asymmetry for each chromosome in a complement is easily obtained by calculating the difference of relative lengths of long arm and short arm. The Coefficient of Variation of Centromeric Index, strongly criticized in recent literature, is an additional karyological parameter, not properly connected with karyotype asymmetry. This shows definitively what and how to measure to correctly infer karyotype asymmetry, by proposing to couple two already known parameters in a new way. Hopefully, it will be the basic future reference for all those scientists dealing with cytotaxonomy.
188 citations
TL;DR: Overall, the large-scale analyses of karyotype features within a well-supported phylogenetic framework enabled the most likely patterns of chromosome evolution in Liliaceae to be reconstructed, highlighting diverse modes of kARYotype evolution, even within this comparatively small monocot family.
172 citations