Christian C. Figueroa

Christian C. Figueroa
Universidad de Talca · Instituto de Ciencias Biologicas

PhD

About

92
Publications
20,537
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1,794
Citations
Additional affiliations
August 2002 - February 2013
Universidad Austral de Chile
Position
  • Professor (Full)

Publications

Publications (92)
Article
Host plant recognition are highly dependent on chemosensory perception, which involves chemosensory proteins (CSPs) that bind key chemical compounds the host plants. In this work, we hypothesize that two closely related aphid taxa, which differ in diet breadth, also differ in their CSPs. We detected a non-synonymous difference (lysine for asparagin...
Article
The English grain aphid, Sitobion avenae, is a cosmopolitan pest that feeds on cereals, provoking substantial yield losses by injuring plant tissue and by vectoring plant viruses. Here we report a highly complete, de novo draft genome of the grain aphid using long-read sequencing. We generated an assembly of 2,740 contigs with a N50 of 450 kb. We c...
Article
BACKGROUND The massive use of synthetic insecticides strongly affects the level of insecticide resistance in populations of Myzus persicae worldwide. The selection of target site insensitivity- mutations is particularly worrying in areas where agro-industrial crops are vulnerable to the attacks of aphids that vector viruses, as in the case of Tunis...
Article
Myzus persicae is a cosmopolitan aphid that is highly polyphagous and an important agricultural pest. The subspecies M. persicae nicotianae has been described for highly specialized phenotypes adapted to tobacco ( Nicotiana tabacum ). In Chile, the population of M. persicae nicotianae was originally composed of a single red genotype that did not po...
Article
The green peach aphid, Myzus persicae (Sulzer), is a pest mainly controlled with insecticides, and it can acquire resistance through different mechanisms. Pyrethroids can select the knock down resistance (kdr) mutation in M. persicae and can also produce lethal and sub-lethal effects on its main parasitoid, Aphidius colemani Viereck. However, kdr-r...
Article
Full-text available
The use of synthetic insecticides may cause failures in the biological control of insect pests due to undesired side effects on natural enemies and the rapid evolution of insecticide resistance in agroecosystems. Residues of neurotoxic insecticides can interfere with the recognition of chemical cues used by natural enemies to find pests. We investi...
Article
Full-text available
Global warming will increase pest insect population sizes and diminish the effectiveness of biological control. This biological control failure scenario appears to be of particular concern for areas with a significant increase in maximum temperatures, such as the increase experienced in the Central Valley of Chile over the last 40 years. We assesse...
Article
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The maintenance of sexuality is a puzzling phenomenon in evolutionary biology. Many universal hypotheses have been proposed to explain the prevalence of sex despite its costs, but it has been hypothesized that sex could be also retained by lineage‐specific mechanisms that would confer some short‐term advantage. Aphids are good models to study the m...
Article
Full-text available
Background: Parasitoid wasps have fascinating life cycles and play an important role in trophic networks, yet little is known about their genome content and function. Parasitoids that infect aphids are an important group with the potential for biological control. Their success depends on adapting to develop inside aphids and overcoming both host a...
Article
Full-text available
Aim Antarctica's remote and extreme terrestrial environments are inhabited by only two species of native vascular plants. We assessed genetic connectivity amongst Antarctic and South American populations of one of these species, Colobanthus quitensis, to determine its origin and age in Antarctica. Location Maritime Antarctic, sub‐Antarctic islands...
Preprint
Full-text available
Background Parasitoid wasps have fascinating life cycles and play an important role in trophic networks, yet little is known about their genome content and function. Parasitoids that infect aphids are an important group with the potential for biocontrol, and infecting aphids requires overcoming both aphid defenses and their defensive endosymbionts....
Article
Full-text available
Generalist parasitoids of aphids, such as the wasp Aphidius ervi, display significant differences in terms of host preference and host acceptance, depending on the host on which they developed (natal host), which is preferred over a non-natal host, a trait known as host fidelity. This trait allows females to quickly find hosts in heterogeneous envi...
Article
Full-text available
The peach potato aphid, Myzus persicae (Sulzer), is a worldwide pest of many crops, and the most important aphid pest of peach and potato crops in Tunisia, mainly due to virus transmission, for which insecticides are frequently applied. We studied the genetic structure of M. persicae populations in Tunisia, in order to further our understanding of...
Article
Full-text available
Background: Aphids (Hemiptera: Aphididae) are insects with one of the highest potentials for invasion. Several aphid species are present globally due to introduction events; they represent important pests of agroecosystems. The bird cherry-oat aphid Rhopalosiphum padi (Linnaeus) is a major pest of cereals and pasture grasses worldwide. Here, we re...
Article
In agroecosystems, introduced aphids that reproduce by obligate parthenogenesis (OP) show strong biased representation of a few genotypes (superclones), whereas species with cyclical parthenogenesis (CP) exhibit the opposite trend with many unique genotypes. We analyzed the biological and genetic features of 23 different aphid species introduced in...
Article
The diversity and distribution of the genetic variation in forest phytophagous insect populations can be highly sensitive to forest fragmentation. This should be particularly evident for monophagous insects living on endangered host plants. The aphid Neuquenaphis staryi uses the tree Nothofagus alessandrii, commonly named Ruil, exclusively as a hos...
Data
Complete lists of differentially expressed genes for Aphidius ervi
Data
Supplementary File Table S2: Final number of reads from each library used in DE analysis. Figure S1. Sample correlation matrix heatmap for all Aphidius ervi libraries.
Article
Full-text available
The molecular mechanisms that allow generalist parasitoids to exploit many, often very distinct hosts are practically unknown. The wasp Aphidius ervi, a generalist koinobiont parasitoid of aphids, was introduced from Europe into Chile in the late 1970s to control agriculturally important aphid species. A recent study showed significant differences...
Article
Full-text available
Inbreeding frequently reduces the fitness of organisms, but little is known about how this phenomenon can affect the biological control. Host fidelity provides an adaptive advantage to aphid parasitoids, allowing females to find their aphid host more quickly in heterogeneous environments. This trait is mediated by the learning of signals, mainly ch...
Article
Full-text available
Asexual reproduction is very common in invasive insect pest. In the recent years, increasing evidences have shown that some invasive asexual lineages display an outstanding capacity to predominate in space and persist on time (superclones). However, little is known about the host-use behavior of these superclones. The English grain aphid Sitobion a...
Article
Full-text available
As biological invasions, intentional introductions often result in a loss of genetic diversity in the new founder populations. In classical biological control programs, natural enemies introduced into novel environments are likely to suffer from population bottlenecks. Unlike invasive populations, individuals for biological control are typically ke...
Article
Full-text available
Facultative bacterial endosymbionts in insects have been under intense study during the last years. Endosymbionts can modify the insect's phenotype, conferring adaptive advantages under environmental stress. This seems particularly relevant for a group of worldwide agricultural aphid pests, because endosymbionts modify key fitness related traits, i...
Article
Full-text available
Adaptive mechanisms involved in the prediction of future environments are common in organisms experiencing temporally variable environments. One of these is AGR (anticipatory gene regulation); in which differential gene expression occur in an individual, triggered by the experience of an ancestor. In this study, we explored the existence of AGR dri...
Article
Full-text available
Keywords: ecological specialization host selection insecteplant relationship learning Myzus persicae retroactive interference Insects are able to learn from experience acquired in their natal habitat, thereby obtaining adaptive advantages. However, the acquisition of new information could involve defects in retrieving previously learned information...
Article
Full-text available
Host recognition and use in female parasitoids strongly relies on host fidelity, a plastic behavior which can significantly restrict the host preferences of parasitoids, thus reducing the gene flow between parasitoid populations attacking different insect hosts. However, the effect of migrant males on the genetic differentiation of populations has...
Article
Blue whales (Balaenoptera musculus) were among the most intensively exploited species of whales in the world. As a consequence of this intense exploitation, blue whale sightings off the coast of Chile were uncommon by the end of the 20th century. In 2004, a feeding and nursing ground was reported in southern Chile (SCh). With the aim to investigate...
Article
Full-text available
The green peach aphid, Myzus persicae (Sulzer), is a generalist insect herbivore capable of using a wide range of cultivated plants and weeds. In this laboratory study, we examined the inter-clonal variation in M. persicae’s ability to exploit the wild peach Prunus davidiana, a source of genetic resistance to aphids used by peach breeding programs....
Article
Full-text available
It is generally assumed that species with low population sizes have lower genetic diversities than larger populations and vice versa. However, this would not be the case for long-lived species with long generation times, and which populations have declined due to anthropogenic effects, such as the blue whale (Balaenoptera musculus). This species wa...
Article
Full-text available
The tobacco aphid Myzus persicae nicotianae Blackman is a subspecies of the highly polyphagous and agricultural pest Myzus persicae (Sulzer). For its control, insecticide applications are widely used, but resistance to numerous molecules has been reported, displaying at least three insecticide resistance mechanisms, including: (i) elevated carboxyl...
Data
Figure S1. Bayesian analysis graph, showing no structure among Corcovado Gulf blue whales population. Figure S2. Allele frequency distribution in the blue whale Corcovado feeding ground. Figure S3. Neighbor-joining network showing the relationships among Corcovado Gulf blue whale haplotypes.
Article
Full-text available
The seasonal dynamics of neutral genetic diversity and the insecticide resistance mechanisms of insect pests at the farm scale are still poorly documented. Here this was addressed in the green peach aphid Myzus persicae (Sulzer) (Hemiptera: Aphididae) in Central Chile. Samples were collected from an insecticide sprayed peach (Prunus persica L.) orc...
Article
Full-text available
Most evolutionary research on biological invasions has focused on changes seen between the native and invaded range for a particular species. However, it is likely that species that live in human-modified habitats in their native range might have evolved specific adaptations to those environments, which increase the likelihood of establishment and...
Article
Full-text available
The use of alternative hosts imposes divergent selection pressures on parasitoid populations. In response to selective pressures, these populations may follow different evolutionary trajectories. Divergent natural selection could promote local host adaptation in populations, translating into direct benefits for biological control, thereby increasin...
Article
Full-text available
The green peach aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae) is amajor pest of agriculture worldwide that has proved to be particularly adept at evolving insecticide resistance. Several mechanisms that confer resistance to many insecticide types have been described in M. persicae. We measured the resistance status of nine multilocus genoty...
Article
Nine polymorphic microsatellite markers for blue whale (Balaenoptera musculus) are developed from, genomic libraries. They are characterized using 32 B. musculus individuals from Southern and Northern Chile population(s). The number of alleles per locus range from 5 to 9. The observed and expected heterozygosities range from 0.438 to 0.906 and from...
Conference Paper
Full-text available
M. persicae en Chile, actualmente es considerado como la tercer plaga de importancia económica, afectando cultivos como durazno Prunus persica y pimentón Capsicum annuum. M. persicae se reproduce mediante partenogénesis cíclica, alternando una generación sexual y varias asexuales. Las poblaciones sexuales de M. persicae tienden a ser genéticamente...
Article
Full-text available
Background: Insecticide resistance is one of the best examples of rapid micro-evolution found in nature. Since the development of the first synthetic insecticide in 1939, humans have invested considerable effort to stay ahead of resistance phenotypes that repeatedly develop in insects. Aphids are a group of insects that have become global pests in...
Article
Full-text available
Among herbivorous insects that have exploited agro-ecosystems, the peach-potato aphid, Myzus persicae, is recognized as one of the most important agricultural pests worldwide. Uses over 400 plant species and has evolved different insecticides resistance mechanisms. As M. persicae feeds upon a huge diversity of hosts, it has been exposed to a wide v...
Data
Probe name, gene description, primers sequences, PCR efficiency and microarray hybridization with up-regulation for genes study by RT-qPCR. (XLSX)
Data
The full list of up-regulated genes, with the log2 fold-change values and descriptions based on the closest BLAST hits. (XLSX)
Data
Primers and probes used for insecticide resistance characterization. (XLSX)
Data
Gene expression results for microarray and RT-qPCR methodologies. (XLSX)
Poster
Full-text available
El pulgon verde del duraznero Myzus persicae (Sulzer), es considerado la tercera plaga de importancia economica en Chile. Tiene como hospedero primario al duraznero (Prunus persica) donde realiza su reproducción sexual y como hospedantes secundarios a un gran número de especies vegetales distribuidas en más de 40 familias botánicas ocurriendo su fa...
Data
List of multilocus genotypes of sampled Eriosoma lanigerum . (DOCX)
Article
Full-text available
Parasitoid disturbance populations in agroecosystems can be maintained through the provision of habitat refuges with host resources. However, specialized herbivores that feed on different host plants have been shown to form host-specialized races. Parasitoids may subsequently specialize on these herbivore host races and therefore prefer parasitizin...
Article
The development of insecticide resistance in pest insects is an increasing problem for agriculture, forestry and public health. Aphids are ubiquitous herbivorous insects, with approximately 4700 known species, of which less than 5% exploit the agricultural environment successfully. Of these, the peach-potato aphid Myzus persicae Sulzer is recognize...
Poster
Full-text available
El pulgon verde del duraznero Myzus persicae (Sulzer) es considerado la tercera plaga de importancia económica en Chile. Este áfido alterna entre reproducción sexual (sobre duraznero Prunus persica) y asexual (sobre hospederos secundarios que incluyen cultivos hortícolas y malezas). Su particular modo de reproducción puede conducir diferenciación g...
Article
Full-text available
During the past 30 years, the evolution of endothermy has been a topic of keen interest to palaeontologists and evolutionary physiologists. While palaeontologists have found abundant Permian and Triassic fossils, suggesting important clues regarding the timing of origin of endothermy, physiologists have proposed several plausible hypotheses of how...
Article
Cyclically parthenogenetic animals such as aphids are able alternating sexual and asexual reproduction during its life cycle, and represent good models for studying short-term evolutionary consequences of sex. In aphids, different morphs, whether sexual or asexual, winged or wingless, are produced in response to specific environmental cues. The pro...
Article
Full-text available
The horn fly, Haematobia irritans (L.) (Diptera: Muscidae), was introduced to Chile in the beginning of the 1990s. Since its introduction, farmers have controlled this pest almost exclusively with insecticides. To understand the consequences of different control strategies on the development of insecticide resistance and their persistence, a field...
Poster
Full-text available
Los áfidos se caracterizan por exhibir un modo de reproducción (partenogénesis cíclica) que alterna una fase de reproducción sexual con varias fases asexuales partenogenéticas. Como consecuencia, las poblaciones de áfidos pueden mostrar diversos grados de variación y estructura genéticas, dependiendo de la frecuencia de eventos de reproducción sexu...
Article
Full-text available
Myzus persicae (Sulzer) is a highly polyphagous aphid species, with a subspecies (M. persicae nicotianae) well adapted to tobacco (Nicotiana tabacum L.). We evaluated the effect of this host plant on the aphid performance and detoxification enzymes, in order to test the participation of xenobiotic metabolism on the ability of this aphid to overcome...