José Ignacio Márquez-Corro

Pablo de Olavide University | UPO

Carex sect. Schoenoxiphium (18 spp.) is a monophyletic group that has its centre of diversity in eastern south Africa. We describe two new species from the Republic of South Africa and Lesotho on the basis of morphological characters. Both new species (C. badilloi and C. parvirufa) are closely related to C. ludwigii, C. kukkoneniana and C. pseudoru...

Large-scale changes in chromosome number have been associated with diversification rate shifts in many lineages of plants. For instance, several ancient rounds of polyploidization events have been inferred to promote genomic differentiation and/or isolation and, consequently, angiosperm diversification. Dysploidy, although less studied, has been su...

Carex acocksii is a sedge species known only from two populations in the Karoo of the Northern Cape in South Africa. It was described from a single locality (Hantam Mts., Calvinia) more than twenty years ago, and tentatively ascribed to section Petraea because of its unispicate inflorescence and utricles with membranaceous-papyraceous walls. Howeve...

Changes in chromosome number as a result of fission and fusion in holocentric chromosomes have direct and immediate effects on genome structure and recombination rates. These in turn may influence ecology and evolutionary trajectories profoundly. Sedges of the genus Carex (Cyperaceae) comprise ca. 2000 species with holocentric chromosomes that evol...

The effects of single chromosome number change—dysploidy – mediating diversification remain poorly understood. Dysploidy modifies recombination rates, linkage, or reproductive isolation, especially for one‐fifth of all eukaryote lineages with holocentric chromosomes. Dysploidy effects on diversification have not been estimated because modeling chro...

We present a genome assembly of a specimen of common vervain, Verbena officinalis (Streptophyta; Magnoliopsida; Lamiales; Verbenaceae). The genome sequence has a total length of 289.20 megabases. Most of the assembly is scaffolded into 7 chromosomal pseudomolecules. The mitochondrial and plastid genome assemblies have lengths of 495.81 kilobases an...

Societal Impact Statement Biological samples and their associated information are an essential resource used by scientists, governments, policymakers, practitioners and communities to ensure that biodiversity can be appropriately protected and sustainably used. Yet, considering the enormous task of documenting the vast numbers of as‐yet‐unknown pla...

List of taxa accepted in Muñoz-Schüler et al. (2023) and their regional distribution in Chile.

New species to science are still being discovered and described, often from remote habitats. Madagascar is well known for its high species richness and exceptional levels of endemism across taxonomic groups. With an estimated 2,000 plant species still to be described from Madagascar, efforts are underway to gain better understanding of the Cyperace...

Carex section Junciformes is one of the most diverse groups of the genus in South America, consisting of approximately 30 species. Here we describe a new species, Carex recondita, belonging to this section. We studied its placement within a molecular phylogeny of the group and found it to constitute an independent lineage. The new species is morpho...

The knowledge of the genus Carex L. (Cyperaceae) in South America is scattered, without recent comprehensive treatments for any country. Within the continent, Chile is the country that harbors the most diversity, being the second in species richness and the first in endemic taxa. However, Chilean botanists must resort to several Argentinian floras...

The first complete monograph of the Cyperaceae family for Spain and Portugal, written by local authors. This field guide is superbly illustrated with photographs and drawing plates. On sale at www.jolube.es It presents an up-to-date classification including easy-to-use dichotomous keys and numerous data that greatly facilitate the identification...

Conservación Vegetal 27 50 SEBOTA: un encuentro para conocer de cerca la diversidad de nuestra flora Desde el recientemente creado Grupo de Trabajo en Divul-gación y Salidas de Campo de la Sociedad Botánica Españo-la (SEBOT) hemos impulsado una iniciativa que tiene como objetivo principal fomentar la interacción entre miembros y profesionales de la...

Poales are one of the most species‐rich, ecologically and economically important orders of plants and often characterise open habitats, enabled by unique suites of traits. We test six hypotheses regarding the evolution and assembly of Poales in open and closed habitats throughout the world, and examine whether diversification patterns demonstrate p...

What grows where? Knowledge about where to find particular species in nature must have been key to the survival of humans throughout our evolution. Over time, and as people colonised new land masses and habitats, interactions with the local biota led to a wealth of combined traditional and scientific wisdom about the distributions of species and th...

Geographic isolation and chromosome evolution are two of the major drivers of diversification in eukaryotes in general, and specifically, in plants. On one hand, range shifts induced by Pleistocene glacial oscillations deeply shaped the evolutionary trajectories of species in the Northern Hemisphere. On the other hand, karyotype variability within...

Poales are one of the most species-rich, ecologically and economically important orders of plants and often characterise open habitats, enabled by unique suites of traits. We test the hypotheses that Poales species are assembled into distinct phyloregions, with centres of high phylogenetic diversity and endemism clustered in tropical regions, and t...

The effects of single chromosome number change—dysploidy—mediating diversification remain poorly understood. Dysploidy modifies recombination rates, linkage, or reproductive isolation, especially for one-fifth of all eukaryote lineages with holocentric chromosomes. Dysploidy effects on diversification have not been estimated because modeling chromo...

Primera monografía completa de la familia de las ciperáceas para España y Portugal, además escrita por autores locales. La presente guía de campo está magníficamente ilustrada con fotografías y láminas de dibujos. Presenta una clasificación actualizada que incluye claves dicotómicas fáciles de usar y numerosos datos que facilitan enormemente la id...

The ChromEvol software was the first to implement a likelihood-based approach, using probabilistic models that depict the pattern of chromosome number change along a specified phylogeny. The initial models have been completed and expanded during the last years. New parameters that model polyploid chromosome evolution have been implemented in ChromE...

Geographic isolation and chromosome evolution are two of the major drivers of diversification in eukaryotes in general, and specifically, in plants. On one hand, range shifts induced by Pleistocene glacial oscillations deeply shaped the evolutionary trajectories of species in the Northern Hemisphere. On the other hand, karyotype variability within...

• Background and Aims: While variation in genome size and chromosome numbers and their consequences are often investigated in plants, the biological relevance of variation in chromosome size remains poorly known. Here, we examine genome and mean chromosome size in the cyperid clade (families Cyperaceae, Juncaceae, Thurniaceae), which is the largest...

El 31 de julio de 2022 se fundó la asociación Jóvenes por la Botánica Española (JxBE) con el objetivo de conectar a la juventud con el mundo de la botánica y la micología bajo una perspectiva transdisciplinar, interterritorial, reivindicativa e inclusiva: desde estudiantes de Grado, Formación Profesional o aficionados hasta pre- y postdoctorales y...

Broˇzov´a et al. (2022) present a study, “Toward finally unraveling the phylogenetic relationships of Juncaceae with respect to another cyperid family, Cyperaceae”, with the premise of revising the phylogenetic re-lationships in Juncaceae and Cyperaceae based on Sanger sequencing of one nuclear rDNA (ITS) and two plastid regions (the gene rbcL and t...

Con objeto de fomentar el interés por la botánica, surgió la idea de organizar el I Biomaratón de Flora Española: un evento de ciencia ciudadana en el que personas de todo el país salieron a fotografiar el mayor número posible de plantas. Se realizó utilizando la plataforma de ciencia ciudadana iNaturalist, y se vertebró por medio de coordinadores...

Carex section Schoenoxiphium (Cariceae, Cyperaceae) is endemic to the Afrotropical biogeographic region and is mainly distributed in southern and eastern Africa, with its center of diversity in eastern South Africa. The taxon was formerly recognized as a distinct genus and has a long history of taxonomic controversy. It has also an important morpho...

Cyperaceae (sedges) are the third largest monocot family and are of considerable economic and ecological importance. Sedges represent an ideal model family to study evolutionary biology because of their species richness, global distribution, large discrepancies in lineage diversity, broad range of ecological preferences, and adaptations including m...

This is the first work of a series of thorough studies into the taxonomy and systematics of Carex in South America. Here, we present the systematic placement, biogeographic insights, taxonomic accounts, formal typifications and summarized distributions for the 24 species of Carex subgenus Vignea with androgynous spikes in the continent. We performe...

Aim: Madagascar is renowned for its unparalleled biodiversity and endemism. With many ecosystems under threat, research is urgently needed on its unique plant diversity. This applies both to Madagascar's forests and treeless vegetation types. Sedges (Cyperaceae) are among the top 10 species‐richest angiosperm families in Madagascar (310 native spec...

Phylogenetic studies of Carex L. (Cyperaceae) have consistently demonstrated that most subgenera and sections are para‐ or polyphyletic. Yet taxonomists continue to use subgenera and sections in Carex classification. Why? The Global Carex Group here takes the position that the historical and continued use of subgenera and sections serves to (1) org...

Carex acocksii is known only from two locations in the Northern Cape of South Africa. Its area of occupancy (AOO) is only 12 km2 and the extent of occurrence (EOO) is 55 km2. The main threat is overgrazing pressure by livestock and possible impacts of climate change. The species is thus considered Critically Endangered (CR) under criterion B (B1ab(...

In the present paper, 58 chorological novelties for Gredos range (Central System, Spain) are showed. Some of them represent important disjunctions with respect to known Iberian distribution, as the cases of Cytinus ruber (Fourr.) Fritsh, Isolepis fluitans (L.) R.Br., Alyssum montanum L. and Lysimachia ephemerum L. Some species, such as Carex lainzi...

The megadiverse genus Carex (c. 2000 species, Cyperaceae) has a nearly cosmopolitan distribution, displaying an inverted latitudinal richness gradient with higher species diversity in cold‐temperate areas of the Northern Hemisphere. Despite great expansion in our knowledge of the phylogenetic history of the genus and many molecular studies focusing...

Holocentric chromosomes are characterised by the presence of kinetochoric activity along the chromosome length. This atypical chromosomal architecture has evolved independently in a wide array of lineages across the tree of life. Different mechanisms have been developed to overcome meiotic problems posed by holocentry, such as inverted meiosis and...

Here we report chromosome number counts from the sedge family (Cyperaceae), most of which correspond to genus Carex from the Nearctic and western Palearctic. In addition, counts are reported for some Neotropical and Afrotropical sedges. We provide the first known chromosome counts for the subfamily Mapanioideae, 5 genera (Lagenocarpus, Afroscirpoi...

Carex in South America Representative diversity. 201 taxa (about 10% of the whole genus), belonging to the four major clades and 33 sections. At least 2 introduced spp. (+ other 3 spp.?). Multiple origins. Carex has colonized South America several independent times and via different colonization routes. Ecology. Neotropical Carex grow in cold--...

Despite most of the cytogenetic research is focused on monocentric chromosomes, chromosomes with kinetochoric activity localized in a single centromere, several studies have been centered on holocentric chromosomes which have diffuse kinetochoric activity along the chromosomes. The eukaryotic organisms that present this type of chromosomes have bee...

We report on the outcomes of the XIV MEDECOS & XIII AEET meeting (http://www.medecos- aeet-meeting2017.es/) to identify the major topics, trends, and issues of interest for the international community working in Mediterranean-type ecosystems worldwide.

Novelties of the Sierra de Gredos bryoflora (Central System, Spain), with special remarks on the autonomous community of Extremadura This study present new records of bryophytes based on the collections made along the years 2016 and 2017 in both oro and cryoromediterranean bioclimatic subzones of Gredos mountain range, which were scarcely collected...

Despite the significant increase of bryological studies in Spain during the last decades, some regions remain poorly studied. This is the case of Sierra de Gredos mountain range, in the Iberian Central System, which we visited in several collecting expeditions, with focus in the insufficiently explored high mountain areas. As a result, we highlight...

Premise of the study: The sedge Carex macloviana d'Urv presents a bipolar distribution. To clarify the origin of its distribution, we consider the four main hypotheses: long-distance dispersal (either by mountain hopping or by direct dispersal), vicariance, parallel evolution, and human introduction. Methods: Phylogenetic, phylogeographic, and d...

Premise of research. The Schoenoxiphium clade (Carex, Cyperaceae) exhibits a high species diversity in South Africa and a complex taxonomy. Previous phylogenetic studies did not resolve the species relationships within the Schoenoxiphium clade due to the lack of informative characters in DNA markers used. Our aim is to resolve the species relations...

A pesar de la cercanía de la sierra de Gredos (Sistema Central) a importantes núcleos de población como Madrid o Salamanca, la brioflora gredense dista mucho de ser bien conocida. Este trabajo es el resultado de numerosas prospecciones llevadas a cabo a lo largo de los últimos cuatro años en la citada cadena montañosa, especialmente en la zona meno...

In eukaryotes, we can recognize two kinds of chromosomes, based on the location of the kinetochores. The majority of eukaryotes have monocentric chromosomes, in which kinetochoric activity is concentrated in a single locus. In several unrelated eukaryotic lineages, chromosomes are holocentric, having diffuse centromeric / kinetochoric activity alon...