Carmen Callejas- PhD Biology
- Professor at Complutense University of Madrid
Carmen Callejas
- PhD Biology
- Professor at Complutense University of Madrid
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70
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Introduction
Carmen Callejas currently works at the Department of Genetics, Complutense University of Madrid. Carmen does research in Genetics, Molecular Biology and Systematics (Taxonomy). Their current project is 'Conservation biological control of the olive fruit fly, Bactrocera oleae: Effect of landscape structure and importance of predation'.
Current institution
Additional affiliations
July 2011 - April 2016
Publications
Publications (70)
Mediterranean olive cultivation faces challenges in the global environmental change context. Pests and diseases caused by arthropods such as Bactrocera oleae, Prays oleae, and certain vectors of Xylella fastidiosa are expected to increase and spread in part due to this global scenario. The control of these arthropods has relied on synthetic pestici...
Simple Summary
The output of olive industry at the Mediterranean Basin, headed by Spain, is huge worldwide. The olive fruit fly Bactrocera oleae is the major pest of olive orchards. The damages it causes become in considerable economic losses as well as a decrease in oil quantity and quality. A key question for the success of pest control strategie...
The Iberian ibex, Capra pyrenaica (Schinz, 1838), is an Iberian endemic species of great ecological and hunting relevance. The severe decline of its populations at the end of the 19th century was owed to habitat destruction, several diseases and uncontrolled hunting. The implementation of reintroduction and conservation programmes in recent decades...
The reintroduction of Iberian ibex, Capra pyrenaica in the Sierra de Guadarrama National Park (PNSG) was carried out in the 1990s with few individuals from Sierra de Gredos and Las Batuecas populations. At present, the population is well established and its density has increased to almost saturation level. For an efficient management and conservati...
Las enfermedades parasitarias en la fauna silvestre han cobrado mayor importancia al conocer su efecto negativo en la producción ganadera, en la conservación de la propia fauna y en la salud humana debido a la existencia de una transmisión bidireccional entre la fauna silvestre y doméstica. El corzo es una de las especies cinegéticas que más se ha...
The olive fruit fly (olf) Bactrocera oleae is the most damaging olive pest. The intensive use of organophosphates (OPs) to control it, led to an increase in resistance in field populations. This study assesses the presence and distribution of three mutations at the ace gene related to target site insensitivity to OPs in Spain. Samples from other Me...
El olivo y su producción constituyen un pilar fundamental del sistema agroalimentario español. Gracias a unas 2,5 millones de hectáreas cultivadas con 100 variedades diferentes y unas óptimas condiciones climáticas, nuestro país genera el 45% de la aceituna mundial, lo que nos convierte en el primer productor y exportador de aceite de oliva y aceit...
Designing biological control strategies for the olive fruit fly (Bactrocera oleae (Rossi)) by predators requires the study of their biology and effectiveness. In this work, we have studied the relationship between ground beetle activity density and local (soil condition) and landscape factors in the olive area of southeastern Madrid, as well as the...
Generalist predators such as spiders, earwigs or ground beetles are important
natural enemies of agricultural pests. Determining the best candidate to perform a biological control is a complex task. However, molecular tools can overcome this issue. In this work a set of species-specific primers for Bactrocera oleae DNA has been tested in the gut of...
The European Union (EU) is facing the recent arrival of the bacterium Xylella fastidiosa. Its fast spread has caused great alarm because of the economic impact it implies for the agroeconomy of European countries. Among its insect vectors, Philaenus spumarius has been demonstrated to transmit the bacterium from infected to uninfected trees in the E...
Xylella fastidiosa is one of the most destructive pathogens of olive orchards. Its recent arrival to Europe can cause important losses, with consequences for the economies of countries that produce and export table olives and olive oil. Philaenus spumarius (Linnaeus 1758) is the only vector described of X. fastidiosa up to date in Europe and the id...
La mosca Bactrocera oleae (Rossi, 1790) es una de las plagas más dañinas del olivo, cuya producción constituye uno de los puntales del sistema agroalimentario español. Para minimizar las pérdidas que la mencionada plaga genera en el sector olivarero, se ha extendido el uso de insecticidas organofosforados, que conllevan una enorme inversión económi...
La mosca del olivo, Bactrocera oleae (Rossi 1790), y la polilla del olivo, Prays oleae (Bernard 1788), son las plagas más dañinas para el cultivo del olivo, y en ambos casos la complejidad del paisaje afecta negativamente a sus poblaciones. Desentrañar los mecanismos responsables de este efecto es una tarea compleja que puede desvelar información e...
El olivo y su producción constituyen un pilar fundamental del sistema agroalimentario español. La presencia de la plaga Bactrocera oleae en este cultivo implica graves pérdidas económicas. El empleo abusivo de insecticidas no selectivos y perjudiciales para el medio ha favorecido el incremento de las poblaciones resistentes. Por este motivo, el con...
Bactrocera oleae, the olive fruit fly, is a major pest of olive (Olea europaea L.) trees worldwide. Its presence can cause important losses, with consequences for the economies of countries that produce and export table olives and olive oil. Efforts to control olive fruit fly populations have, however, been insufficient. Now more than ever, environ...
The white-clawed crayfish is endemic to western and southern Europe and its population has dramatically
decreased in the last few decades. The latest reports on this species have shown that the genetic variability of Spanish populations displays a clear geographic pattern, with two main genetic groups across its range of distribution. To ensure the...
The white-clawed crayfish is endemic to western and southern Europe and its populations have decreased over recent decades. Spanish populations are generally poorly represented in scientific reports and are usually studied only with a single molecular marker. Here, we use two mitochondrial markers (cytochrome oxidase subunit I and rDNA 16S genes) t...
This paper is a review about the genetic studies on Spanish populations of the crayfish of genus Austropotamobius. The populations of this species, native to Europe, have undergone a drastic decline. Therefore, the species is now protected and plans are developed for its conservation. Genetic data show that Spanish stocks should be considered as a...
La mosca Bactrocera oleae (Gmelin 1790) constituye la mayor plaga del olivo. Su presencia puede suponer un descenso del 15% de la producción olivarera en España. El uso extendido de insecticidas para minimizar las pérdidas genera un continuo debate social y sanitario. Como alternativa para combatir esta plaga, se pretende potenciar el control bioló...
The white-clawed crayfish is endemic to western and southern Europe and its populations have decreased
over recent decades. Genetic information available about Spanish populations of this species usually
comes from a single molecular marker.
In the present work, we used two mitochondrial markers (Cytochrome Oxidase subunit I and rDNA 16S
genes) to...
El cangrejo de río Austropotamobius pallipes, ha sufrido un importante declive en las últimas décadas. En
España se han puesto en marcha diversos planes de actuación, basados en la translocación de individuos
desde otras poblaciones naturales o desde astacifactorías. No obstante, debemos considerar que toda
actuación para la recuperación de la espe...
La mosca Bactrocera oleae, es la plaga más importante del olivo (Olea europea). El interés en el estudio de esta plaga es evidente, ya que los países del área mediterránea y España en particular, son los principales productores y exportadores de aceite de oliva y aceitunas de mesa.
El objetivo del presente trabajo es profundizar en la caracterizac...
The white-clawed crayfish (Austropotamobius italicus), a cornerstone of Spain's aquatic ecosystems, was once widely distributed throughout much of the country. Unfortunately, its populations have suffered very strong declines over the last 40 years due to the spread of introduced species (red swamp and signal crayfishes), diseases, habitat loss and...
The tephritid Bactrocera oleae (Gmelin) is a harmful pest of olive crops that cause important agricultural and economic losses in the Mediterranean area where 90% of the world olive trees are cultivated. The knowledge of the genetic diversity in insect pest species populations is critical for decisions concerning appropriate control management stra...
Phylogeography involves knowledge of the spatial distribution of related individuals and historical information on the relationship within and among populations and species. The phylogeography of many groups has been studied over recent decades, and this field of knowledge is now becoming important in solving the problems of pest control in agricul...
The Mediterranean fruit fly, Ceratitis capitata (Wiedemann) (Diptera: Tephritidae), is considered one of the most economically damaging pests of citrus orchards in Spain. The characterization of C. capitata population structure, at a large geographical scale, by using a combination of RAPD and ISSR markers can allow analyzing the genetic variabilit...
The olive fruit fly is a major pest of olive crops, whose larvae are monophagous and feed
exclusively on olive fruits. Its expansion is restricted to the olive trees geographic areas. The
Mediterranean basin holds the 98% of the world’s cultivated olive trees. This cultivation accounts
for some 3.37% of the total agricultural production of the E...
Spanish freshwater ecosystems are suffering great modification and some macroinvertebrates like Austropotamobius italicus, the white-clawed crayfish, are threatened. This species was once widely distributed in Spain, but its populations have shown a very strong decline over the last thirty years, due to different factors. Three Spanish populations...
Austropotamobius italicus was once widely distributed throughout most of the country's limestone basins in Spain. But its populations have shown a very strong decline over the last thirty years, due to different factors. Thus, the species now enjoys protection under regional, national and international legislation. Therefore, knowledge of the level...
Phylogeography involves knowledge of the spatial distribution of related individuals and historical information on the relationship within and among populations and species. The phylogeography of many groups has been studied over recent decades, and this field of knowledge is now becoming important in solving the problems of pest control in agricul...
Fusarium proliferatum is together with Fusarium verticillioides the main source of fumonisins, a health risk mycotoxin, contaminating agro-products. Contrary to F. verticillioides, it colonizes a wide range of host plants besides maize, such as wheat or barley among others, in particular in certain regions (Southern Europe). The phylogenetic study...
The European Union is faced with the challenge of environmental alteration. In recent years, human activities and accelerating climate change have had a great impact in many regions, with the freshwater ecosystems of Mediterranean countries being hit particularly hard.
Spain has the greatest biodiversity of Europe. The country’s maritime barriers,...
The tephritid Bactrocera oleae (Gmelin) is a harmful pest of olive crops; its larvae are monophagous and feed exclusively on olive fruits. Despite the economic importance of this species, important issues remain to be clarified. In the present study, the genetic variability within and among 21 populations was assessed using random amplified polymor...
Spanish populations of the white‐clawed crayfish have declined sharply over the last three decades. Although Austropotamobius pallipes was once widely distributed and very abundant in most of the limestone basins of the country, outbreaks of crayfish plague since 1978 have reduced its populations, and now only some 500–600 small populations are lef...
The major facilitator superfamily (MFS) is a ubiquitous group of proteins involved in the transport of a wide range of compounds, including toxins produced by fungal species. In this paper, a novel MFS encoding gene (Fusarium iron related gene or FIR1), which had shown an up-regulation in fumonisin-inducing conditions, has been identified and chara...
Fruit flies (Diptera: Tephritidae) are a species-rich and economically important group. The phylogenetic relationships among the many taxa are still to be fully resolved and the monophyly of several groups is still to be confirmed. This paper reports a study of the phylogenetic relationships among 23 economically important tephritid species (repres...
The contamination of cereals with mycotoxins produced by species ofFusarium is an important risk to human and animal health. The toxigenic profile is different depending on theFusarium species considered and, in some species, differences can also be observed at intraspecific level. Information about the distribution and variability of the mycotoxig...
The Aleurodicus dispersus–Lecanoideus floccissimus complex has become a very important agricultural pest in the Canaries. These species are not easily differentiated by their morphological characteristics. The aim of the present study was to obtain genetic markers to unambiguously distinguish both species of this complex. Thus, six random primers...
Aleurodicus dispersus Russell (Hemiptera: Aleyrodidae), a highly polyphagous species, has since the 90's been an important pest of ornamentals and tropical crops in the Canary Islands. In this study the RAPD-PCR technique was used to study the genetic structure of this whitefly in this archipelago. A total of 68 different bands were scored in seven...
The RAPD-PCR technique was employed to identify three endemic Spanish species of Barbus: Barbus bocagei, B. graellsii and B. sclateri, that present very similar morphologies. Using seven primers, six diagnostic bands were found in B. bocagei, 11 in B. graellsii and nine in B. sclateri. Cluster analysis of the genetic similarity Values obtained from...
Hoy en día, los posibles cambios genéticos subyacentes en mecanismos de resistencia inducida, son prácticamente desconocidos. Sin embargo, resulta evidente la necesidad de esa información genética en la planificación de los programas de control integrado si queremos una lucha contra las plagas más eficaz y ecológicamente aceptable. El cultivo del t...
Biotypes B and Q of Bemisia tabaci (Gennadius), collected from the islands of Tenerife and Majorca respectively, were exposed to competition conditions on tomato cv. Marmande in the laboratory. Both biotypes were established in single and mixed cultures at different densities. Increased mortality of biotype Q females and immature instars was observ...
The Tephritidae Ceratitis capitata is one of the most important agricultural pests in the world. Eradication programmes need as much genetic information as possible to be efficient. It is vital to know the genetic variation that exists in the areas thought to have been important in the expansion of the species, such as the Iberian Peninsula. The ai...
A b s t r a c t . RAPD-PCR method is now widely employed in genetic research and is a powerful asset when trying to identify species. In the present work, RAPD genetic markers were obtained for distinguishing between three species of the genus Gobio that show substantial morphological resemblance. Different profiles were observed: six species-speci...
Random amplified polymorphic DNA (RAPD) markers were used to estimate the population structure and phylogenetic relationships among the eight species of the genus Barbus that inhabit the Iberian Peninsula. Ten random oligodecamers were used to amplify DNA from 232 fish sampled from 15 populations. A total of 270 markers were detected that revealed...
Random amplified polymorphic DNA (RAPD) analysis has been used to identify the eight Barbus species of the Iberian Peninsula, whose morphological differentiation is difficult. Ten random primers were employed to generate RAPD markers. Different RAPD profiles were observed for the different species. Four species-specific markers were found in B. boc...
Nucleotide sequence fragments of the mitochondrial DNA gene encoding cytochrome b were examined in 26 individuals belonging to the seven species of Barbus endemic to the Iberian Peninsula: Barbus haasi, B. bocagei, B. graellsii, B. sclateri, B. comiza, B. guiraonis, and B. microcephalus. Six of the seven currently recognized species can be distingu...
Caracterización genética en Ceratitis capitata Wied. asociada a fruto hospedador. I. Análisis isoenzimático P. RODA, C. CALLEJAS, A. REYES Y M. D. OCHANDO En el presente trabajo se han analizado dos poblaciones de Ceratitis capitata Wied. de una misma zona geográfica: Basta (Valencia), una de ellas obtenida a partir de higos infestados y la otra a...
Caracterización genética en Ceratitis capitata asociada a fruto hospedador. II. Análisis mediante RAPD-PCR. A. REYES, C. CALLEJAS, P. RODA Y M. D. OCHANDO La introducción de las metodologías genético-moleculares en el estudio de plagas agrícolas ofrece una oportunidad inestimable para la caracterización de razas y biotipos. En nuestro estudio hemos...
