ORCID Profile
0000-0002-9947-9036
Current Organisations
Indiana University
,
Consejo Nacional de Investigaciones Científicas y Técnicas
,
Universidad Nacional del Comahue Centro Regional Universitario Bariloche
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Publisher: Cold Spring Harbor Laboratory
Date: 04-08-2018
DOI: 10.1101/382945
Abstract: Arthropods comprise the largest and most erse phylum on Earth and play vital roles in nearly every ecosystem. Their ersity stems in part from variations on a conserved body plan, resulting from and recorded in adaptive changes in the genome. Dissection of the genomic record of sequence change enables broad questions regarding genome evolution to be addressed, even across hyper- erse taxa within arthropods. Using 76 whole genome sequences representing 21 orders spanning more than 500 million years of arthropod evolution, we document changes in gene and protein domain content and provide temporal and phylogenetic context for interpreting these innovations. We identify many novel gene families that arose early in the evolution of arthropods and during the ersification of insects into modern orders. We reveal unexpected variation in patterns of DNA methylation across arthropods and ex les of gene family and protein domain evolution coincident with the appearance of notable phenotypic and physiological adaptations such as flight, metamorphosis, sociality and chemoperception. These analyses demonstrate how large-scale comparative genomics can provide broad new insights into the genotype to phenotype map and generate testable hypotheses about the evolution of animal ersity.
Publisher: Springer Science and Business Media LLC
Date: 23-01-2020
DOI: 10.1186/S13059-019-1925-7
Abstract: Arthropods comprise the largest and most erse phylum on Earth and play vital roles in nearly every ecosystem. Their ersity stems in part from variations on a conserved body plan, resulting from and recorded in adaptive changes in the genome. Dissection of the genomic record of sequence change enables broad questions regarding genome evolution to be addressed, even across hyper- erse taxa within arthropods. Using 76 whole genome sequences representing 21 orders spanning more than 500 million years of arthropod evolution, we document changes in gene and protein domain content and provide temporal and phylogenetic context for interpreting these innovations. We identify many novel gene families that arose early in the evolution of arthropods and during the ersification of insects into modern orders. We reveal unexpected variation in patterns of DNA methylation across arthropods and ex les of gene family and protein domain evolution coincident with the appearance of notable phenotypic and physiological adaptations such as flight, metamorphosis, sociality, and chemoperception. These analyses demonstrate how large-scale comparative genomics can provide broad new insights into the genotype to phenotype map and generate testable hypotheses about the evolution of animal ersity.
Publisher: The Royal Society
Date: 04-2022
Abstract: Bio ersity assessments are critical for setting conservation priorities, understanding ecosystem function and establishing a baseline to monitor change. Surveys of marine bio ersity that rely almost entirely on s ling adult organisms underestimate ersity because they tend to be limited to habitat types and in iduals that can be easily surveyed. Many marine animals have planktonic larvae that can be s led from the water column at shallow depths. This life stage often is overlooked in surveys but can be used to relatively rapidly document ersity, especially for the many species that are rare or live cryptically as adults. Using DNA barcode data from s les of nemertean worms collected in three biogeographical regions—Northeastern Pacific, the Caribbean Sea and Eastern Tropical Pacific—we found that most species were collected as either benthic adults or planktonic larvae but seldom in both stages. Randomization tests show that this deficit of operational taxonomic units collected as both adults and larvae is extremely unlikely if larvae and adults were drawn from the same pool of species. This effect persists even in well-studied faunas. These results suggest that s ling planktonic larvae offers access to a different subset of species and thus significantly increases estimates of bio ersity compared to s ling adults alone. Spanish abstract is available in the electronic supplementary material.
Publisher: The Royal Society
Date: 13-07-2016
Abstract: The origin and integration of novel traits are fundamental processes during the developmental evolution of complex organisms. Yet how novel traits integrate into pre-existing contexts remains poorly understood. Beetle horns represent a spectacular evolutionary novelty integrated within the context of the adult dorsal head, a highly conserved trait complex present since the origin of insects. We investigated whether otd1/2 and six3 , members of a highly conserved gene network that instructs the formation of the anterior end of most bilaterians, also play roles in patterning more recently evolved traits. Using ablation-based fate-mapping, comparative larval RNA interference (RNAi) and transcript sequencing, we found that otd1/2 , but not six3 , play a fundamental role in the post-embryonic formation of the adult dorsal head and head horns of Onthophagus beetles. By contrast, neither gene appears to pattern the adult head of Tribolium flour beetles even though all are expressed in the dorsal head epidermis of both Onthophagus and Tribolium . We propose that, at least in beetles, the roles of otd genes during post-embryonic development are decoupled from their embryonic functions, and that potentially non-functional post-embryonic expression in the dorsal head facilitated their co-option into a novel horn-patterning network during Onthophagus evolution.
Location: United States of America
Location: United States of America
Location: No location found
Location: Argentina
Location: Argentina
No related grants have been discovered for Eduardo Enrique Zattara.