Developmental Biology in Chile: historical perspectives and future challenges

2020 ◽  
Vol 52 ◽  
Author(s):  
Miguel L. Concha ◽  
Iskra A. Signore
Keyword(s):  
Developmental Biology ◽  
Comparative Anatomy ◽  
Model Organisms ◽  
Community Size ◽  
Historical Perspectives ◽  
Reproduction Biology ◽  
The Us ◽  
Future Challenges ◽  
Research Centres ◽  
Geographical Locations

Developmental Biology is a growing discipline in Chile. It started in the 1950s when Luis Izquierdo challenged the traditional descriptive perspective of embryology and comparative anatomy to explore the mechanisms underlying the origin of form. After this initial drive, Claudio Barros beginning in the late 1960s and Juan Fernández in the late 1970s, contributed with unique and complementary facets to the early growth of the discipline. In the 1980s, the community of developmental biologists created its first forms of association together with the reproduction biology community, and in 1993 the first international course of developmental biology was organised. During the 1990s and 2000s, a group of young investigators arrived in Chile after postdocs in Europe and the US to build the first research centres of developmental biology, fostering the discipline to an unprecedented level. In the 2010s, as these centres consolidated, a stream of young developmental biologists established new labs at several institutions, expanding the community size and broadening its scope. The recent organisation of developmental biology meetings fostered the sense of community and nurtured the need of formal organisation, setting the bases for the foundation of the Chilean Society for Developmental Biology in 2019. Today, the community of developmental biologists is a mix of young and experienced investigators working in a variety of geographical locations, institutions, topics and model organisms. These characteristics are a strength of an active community that is pushing the discipline to the next level, aiming to make it a relevant actor in national and international settings.

scholarly journals Xenopus Cytogenetics and Chromosomal Evolution

2015 ◽  
Vol 145 (3-4) ◽  
pp. 192-200 ◽  
Author(s):  
Vladimir Krylov ◽  
Tereza Tlapakova
Keyword(s):  
Developmental Biology ◽  
Genetic Linkage ◽  
Chromosome Banding ◽  
Chromosomal Evolution ◽  
Model Organisms ◽  
Gene Localization ◽  
Physical Maps ◽  
Gene Position ◽  
Tightly Coupled

The genus Xenopus represents important model organisms in the field of developmental biology and chromosomal evolution. Developmental processes are tightly coupled with the analysis of gene function via genetic linkage and mapping. Cytogenetic techniques such as chromosome banding or FISH are essential tools for the determination of gene position and subsequently for the construction of linkage and physical maps. Here, we present a summary of key achievements in X. tropicalis and X. laevis cytogenetics with emphasis on the gene localization to chromosomes. The second part of this review is focused on the chromosomal evolution regarding both above-mentioned species. With respect to methodology, hybridization techniques such as FISH and chromosome-specific painting FISH are highlighted.

Positional Correlative Anatomy of Invertebrate Model Organisms Increases Efficiency of TEM Data Production

2014 ◽  
Vol 20 (5) ◽  
pp. 1392-1403 ◽  
Author(s):  
Irina Kolotuev
Keyword(s):  
Developmental Biology ◽  
Cell Biology ◽  
Sampling Rate ◽  
Unmet Need ◽  
Region Of Interest ◽  
Model Organisms ◽  
Data Generation ◽  
Step Method ◽  
Efficient Data ◽  
Research Questions

AbstractTransmission electron microscopy (TEM) is an important tool for studies in cell biology, and is essential to address research questions from bacteria to animals. Recent technological innovations have advanced the entire field of TEM, yet classical techniques still prevail for most present-day studies. Indeed, the majority of cell and developmental biology studies that use TEM do not require cutting-edge methodologies, but rather fast and efficient data generation. Although access to state-of-the-art equipment is frequently problematic, standard TEM microscopes are typically available, even in modest research facilities. However, a major unmet need in standard TEM is the ability to quickly prepare and orient a sample to identify a region of interest. Here, I provide a detailed step-by-step method for a positional correlative anatomy approach to flat-embedded samples. These modifications make the TEM preparation and analytic procedures faster and more straightforward, supporting a higher sampling rate. To illustrate the modified procedures, I provide numerous examples addressing research questions in Caenorhabditis elegans and Drosophila. This method can be equally applied to address questions of cell and developmental biology in other small multicellular model organisms.

Comparative anatomy, homologies and evolution of mandibular, hyoid and hypobranchial muscles of bony fish and tetrapods: a new insight

2008 ◽  
Vol 58 (2) ◽  
pp. 123-172 ◽  
Author(s):  
Rui Diogo
Keyword(s):  
Developmental Biology ◽  
Molecular Biology ◽  
Functional Morphology ◽  
Direct Observation ◽  
Comparative Studies ◽  
Comparative Anatomy ◽  
Bony Fishes ◽  
Living Species ◽  
The Subject ◽  
Lines Of Evidence

AbstractThe Osteichthyes, including bony fishes and tetrapods, is a highly speciose group of vertebrates, comprising more than 42000 living species. The anatomy of osteichthyans has been the subject of numerous comparative studies, but these mainly concern osteological structures; much less attention has been paid to muscles. In fact, the most detailed and comprehensive myological comparative analyses that were actually based on a direct observation of representatives of various major osteichthyan groups were provided various decades by authors such as Luther, Kesteven and principally Edgeworth. The present work provides an updated discussion of the homologies and evolution of the osteichthyan mandibular, hyoid and hypobranchial muscles, based on the author's own analyses and on a survey of the literature, both old and recent. The risks of discussing muscle homologies on the basis of a single line of evidence, even when it concerns innervation or development, is emphasized. It is stressed than only by taking into consideration various lines of evidence (e.g. developmental biology, comparative anatomy, functional morphology, paleontology, molecular biology, experimental embryology, innervation and/or phylogeny) it is possible to establish well-grounded hypotheses of muscle homology.

Olive Propagation Manual

2004 ◽  
Author(s):  
Andrea Fabbri ◽  
Giorgio Bartolini ◽  
Maurizio Lambardi ◽  
Stan Kailis
Keyword(s):  
Seed Germination ◽  
Olive Oil ◽  
State Of The Art ◽  
Advantages And Disadvantages ◽  
Historical Perspectives ◽  
Future Challenges ◽  
Rooting Of Cuttings ◽  
Manual Methods ◽  
Olive Trees ◽  
Olive Industry

This practical manual is an authoritative guide to olive propagation, providing extended information on seed germination, rooting of cuttings, grafting and micropropagation. The authors describe each topic in detail and discuss the relative advantages and disadvantages of each procedure. The Olive Propagation Manual has been developed to take into account the future demand for olive oil, which is expected to increase to three million tonnes annually over the next 10 years. Such volumes will require active farming programs and olive trees for new orchards and the replacement of olive trees in existing orchards. As the olive industry moves from traditional manual methods to mechanised operations, planting stock will need to be developed to meet future challenges. Varietal selection will need to be directed to clones that are early bearing, disease resistant, able to be mechanically harvested, and produce quality fruit and oil. Each of these issues are addressed throughout this book. The Olive Propagation Manual explores historical perspectives, traditional methods and state-of-the-art olive propagation including theoretical explanations and all practical aspects.

Data-Intensive Science in the US DOE: Case Studies and Future Challenges

2011 ◽  
Vol 13 (6) ◽  
pp. 14-24 ◽  
Author(s):  
James Ahrens ◽  
Bruce Hendrickson ◽  
Gabrielle Long ◽  
Steve Miller ◽  
Rob Ross ◽  
...  
Keyword(s):  
Case Studies ◽  
Data Intensive ◽  
The Us ◽  
Future Challenges

Molecular, developmental, and evolutionary genetic studies highlight rapid evolution of genes and genetic systems

Genome ◽  
2010 ◽  
Vol 53 (10) ◽  
pp. 848-852
Author(s):  
Jianping Xu
Keyword(s):  
Large Scale ◽  
Rapid Evolution ◽  
Model Organisms ◽  
Annual Conference ◽  
Genetic Studies ◽  
The Us ◽  
Evolutionary Genetic ◽  
Genetic Systems ◽  
Oral Presentations ◽  
The Impact

The 53rd annual conference of the Genetics Society of Canada was held at McMaster University in Hamilton, Ontario, from 17 to 20 June 2010. About 100 geneticists from across Canada and the US attended the meeting, with a total of 27 posters and 55 oral presentations. The presentations highlighted the power of genetics for understanding a variety of biological issues from sex and recombination to alcoholism and cancer, from DNA replication to antimicrobial resistance, horizontal gene transfer, foraging, and courtship. Large-scale genomic and transcriptomic comparisons were included in many presentations to demonstrate the impact of genomics in biomedical research. The combined molecular, developmental, and evolutionary genetic investigations presented at the meeting, especially those on model organisms, highlighted that genes and genetic systems can evolve very rapidly.

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