(Extensión de beca por segundo año).
Beca CONACYT, programa de apoyo al Posgrado.Chollet-Villalpando JG, FJ García-Rodríguez, E De Luna, J De La Cruz-Agüero. Geometric morphometrics for the analysis of character variation in size and shape of the sulcus acusticus of sagittae otolith in species of Gerreidae (Teleostei: Perciformes). MARINE BIODIVERSITY.
Proyecto: "Morfometría y filogenia de la familia Gerreidae (Teleostei: Perciformes)."
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ABSTRACT. In this paper, we present research carried out in the Morphometric Laboratory, Institute of Ecology, in Xalapa, Veracruz, México, which consisted of creating a new method that links geometric morphometrics techniques and descriptive geometry. In our new method a collection of five photographs was used to tag each morphological point called “Landmarks” that defines the numerical values of the coordinates “x” and “y” in a Cartesian space to generate through the coordinates “x,” “y” and “z” the geometry of the biological form of a beetle, across surfaces, meshes and solids. In this research we worked with the beetle Deltochilum Lobipes that belong to the Scarabaeidae family. We made two prototypes in 3D printed, from the 2D coordinates of morphological points which were obtained through the tpsDig2 program. This research documents evidence that supports the hypothesis of our project: “the quantitative descriptor of shape and size in 2D, contribute in the modeling of complex geometric structures in 3D”.eprint link http://www.tandfonline.com/eprint/r9NaD76gEwETZcuHkvFP/full
Rochmann, D & E. De Luna. Prototyping the complex biological form of the beetle Deltochilum lobipes via 2D geometric morphometrics landmarks and descriptive geometry for 3D printing. Extended Abstract. DOI: 10.14733/cadconfP.2016.xxx-yyy.
En las noticias!Proyecto UC-Mexus
> A day in the life of a Marchantia lab
> Inbioteca impulsa proyectos cientificos
COMPARATIVE GENOMICS OF SMALL RNA-BASED GENE SILENCING MECHANISMS IN LAND PLANTSSUMMARYSmall RNAs have emerged as important regulators of gene expression that ensure the integrity and proper epigenetic regulation of the genome and play essential roles in numerous developmental programs, stress and signaling responses. Small RNAs act in a homology-dependent manner to guide transcriptional and posttranscriptional RNA silencing mechanisms through the activity of small RNA-protein complexes. RNA silencing mechanisms are conserved in plants, but there has been a dramatic diversification and specialization of the core components of the different RNA silencing modules that have generated diverse regulatory pathways through evolution. Experimental, paleontological, morphological, and molecular systematic data all point to the liverworts as being among the first plants to evolve and colonize the landscape. Liverworts are a key group to include in any comparative study aimed at understanding the origin and evolution of organisms and gene regulation. The aim of this proposal is to to study the evolution of gene families encoding core components of RNA silencing mechanisms in land plants by a combination of computational biology, comparative genomics and next generation sequencing approaches. We will use these tools to identify and phylogenetically characterize genes and small RNAs involved in RNA silencing mechanisms in Marchantia polymorpha, the best characterize liverwort.RESUMENLos RNAs pequeños son reguladores importantes de la expresión genética que aseguran la integridad del genoma y juegan un papel esencial durante el desarrollo, las respuestas a estrés y señalización. Los RNAs pequeños dirigen mecanismos transcripcionales y post-transcripcionales de silenciamiento de RNA, de una manera dependiente de homología, a través de complejos de RNA-proteínas. Estos mecanismos se encuentran conservados en las plantas, sin embargo ha ocurrido una dramática diversificación y especialización de los componentes centrales de los diferentes módulos de silencimiento que ha generado diversas rutas reguladoras a través de la evolución. Evidencia experimental muestra que las hepáticas pertenecen al grupo de plantas que primero evolucionaron para colonizar los ambientes terrestres y representan un grupo clave para realizar estudios comparativos enfocados en entender el origen y evolución de los organismos y la regulación genética. El objetivo de esta propuesta es estudiar la evolución de las familias de genes que codifican componentes centrales de la maquinaria de silenciamiento en las plantas terrestres, mediante el empleo de estrategias de biología computacional, genómica comparativa y de secuenciación masiva. Estas herramientas nos permitiran identifcar y caracterizar filogenéticamente los genes y los RNAs pequeños en la planta Marchantia polymorpha, la hepática mejor caracterizada.
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| Quezada-Euan J.J.G., H.D. Sheets, E. De Luna, & T. Eltz. 2015. Identification of cryptic species and morphotypes in male Euglossa: morphometric analysis of forewings (Hymenoptera: Euglossini). APIDOLOGIE 46 (6): 787-795. |
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| Figure 2. Morphometric analysis: A) Configuration of landmarks using the right forewing of a Heliconius erato male. B) Shape coordinates of landmark configuration from all species (n =203). Deformation grid for mean wing specimen for: C) All Heliconius species (i.e. Heliconius consensus), D) Non-pupal mating males, E) Pupal mating males. Intensity and direction of wing shape deformation for non-pupal mating males (relative to pupal mating males) are indicated by arrows in figure (F). |
