38 research outputs found
Genetic characterization of the mexican hair-less pig by means of molecular markers
Long time ago the Mexican Hair-less pig has been considered as a not improved and not valuable ecotype, nevertheless there are few information about the genetics of their populations. In this work we are determining the genetic variability that could exist in the population of Hair-less pigs existing in the rural areas of the Mexican state of Yucatan, as well as in the population of animals, belonging to the center of genetic conservation of the Agricultural Technological Institute N.2. The experiment was divided in two phases, one on the field and another in the laboratory. On one hand, 102 samples were obtained (69 of blood and 33 of hair) from both populations. In the laboratory the DNA was extracted and was amplified by means of the Polimerase Chain Reaction to study 26 microsatellites recommended by the FAO/ISAG for studies of genetic diversity. The alleles number was analyzed, the frequencies alleles, the hetererozygosity (Genepop version programs 3,1c) and the content of polymorphic information (PIC). We observe as in the population coming from the state of Yucatan all the loci were polymorphic, with an average of 7,07 alleles. We also observe that the loci S0355, S0227 are homozygotic. In the population of animals coming from the rescue center most of the loci were polymorphic with the exception of the S0355 and S0215 that were homozygotic, with an alleles average of 3,65. The PIC also reflect the polymorphism detected in most of the locus in both populations. These results are similar to those obtained with different varieties of Iberian pig. According to this, we can consider that the population of hair-less pigs in the state of Yucatan represents a source of genetic variability that could be of utility in the future.Desde tiempos atrás al Cerdo Pelón Mexicano se le ha considerado como un biotipo no mejorado y sin atributos comerciales, no obstante se carece de información sobre la genética de sus poblaciones. En este trabajo se pretende determinar la variabilidad genética que existe en la población de cerdos del biotipo Pelón que se encuentra en las áreas rurales del estado Mexicano de Yucatán, así como en la población perteneciente al centro de conservación genética que se tiene para este biotipo en el Instituto Tecnológico Agropecuario Nº 2. En la fase de campo se obtuvieron 102 muestras (69 de sangre y 33 de pelo) en ambas poblaciones. En la fase de laboratorio se extrajo el ADN de cada una de las muestras por la técnica del Chelex y fueron amplificadas por medio de la reacción en cadena de la polimerasa para estudiar 26 microsatélites recomendados por la FAO/ISAG para estudios de diversidad genética en porcinos. Se analizó el número de alelos, las frecuencias alélicas, las heterocigosidad (Genepop versión 3,1c) y el contenido de información polimórfica (PIC). Se observó que en los animales procedentes del estado de Yucatán todos los loci fueron polimórficos, con un promedio de 7,07, también que existen 2 alelos que son homocigotos para dos locis diferentes (S0355, S0227). En la población de animales procedentes del centro de rescate la mayoría de los loci fueron polimórficos a excepción del S0355 y S0215 que resultaron homocigotos, con un promedio de 3,65 alelos. Así mismo la heterocigosidad y el PIC reflejan el polimorfismo detectado en la mayoría de los locus en ambas poblaciones. Estos resultados son similares a los de otros autores en diferentes variedades de cerdo Ibérico. La población de cerdos pelones del estado de Yucatán son una fuente importante de variabilidad genética que puede ser de utilidad en un futuro inmediato
Modification of the epigenome in human cancer cells by expression of a DNA demethylase from plants
On Five-dimensional Superspaces
Recent one-loop calculations of certain supergravity-mediated quantum
corrections in supersymmetric brane-world models employ either the component
formulation (hep-th/0305184) or the superfield formalism with only half of the
bulk supersymmetry manifestly realized (hep-th/0305169 and hep-th/0411216).
There are reasons to expect, however, that 5D supergraphs provide a more
efficient setup to deal with these and more involved (in particular,
higher-loop) calculations. As a first step toward elaborating such supergraph
techniques, we develop in this letter a manifestly supersymmetric formulation
for 5D globally supersymmetric theories with eight supercharges. Simple rules
are given to reduce 5D superspace actions to a hybrid form which keeps manifest
only the 4D, N=1 Poincare supersymmetry. (Previously, such hybrid actions were
carefully worked out by rewriting the component actions in terms of simple
superfields). To demonstrate the power of this formalism for model building
applications, two families of off-shell supersymmetric nonlinear sigma-models
in five dimensions are presented (including those with cotangent bundles of
Kahler manifolds as target spaces). We elaborate, trying to make our
presentation maximally clear and self-contained, on the techniques of 5D
harmonic and projective superspaces used at some stages in this letter.Comment: 46 pages, 3 figures. V5: version published in JHE
Reconstructing Neutrino Properties from Collider Experiments in a Higgs Triplet Neutrino Mass Model
We extend the minimal supersymmetric standard model with bilinear R-parity
violation to include a pair of Higgs triplet superfields. The neutral
components of the Higgs triplets develop small vacuum expectation values (VEVs)
quadratic in the bilinear R-parity breaking parameters. In this scheme the
atmospheric neutrino mass scale arises from bilinear R-parity breaking while
for reasonable values of parameters the solar neutrino mass scale is generated
from the small Higgs triplet VEVs. We calculate neutrino masses and mixing
angles in this model and show how the model can be tested at future colliders.
The branching ratios of the doubly charged triplet decays are related to the
solar neutrino angle via a simple formula.Comment: 19 pages, 4 figures; one formula corrected, two author's names
corrected; some explanatory comments adde
Probing bilinear R-parity violating supergravity at the LHC
We study the collider phenomenology of bilinear R-parity violating
supergravity, the simplest effective model for supersymmetric neutrino masses
accounting for the current neutrino oscillation data. At the CERN Large Hadron
Collider the center-of-mass energy will be high enough to probe directly these
models through the search for the superpartners of the Standard Model (SM)
particles. We analyze the impact of R-parity violation on the canonical
supersymmetry searches - that is, we examine how the decay of the lightest
supersymmetric particle (LSP) via bilinear R-parity violating interactions
degrades the average expected missing momentum of the reactions and show how
this diminishes the reach in the 'usual' channels for supersymmetry searches.
However, the R-parity violating interactions lead to an enhancement of the
final states containing isolated same-sign di-leptons and trileptons,
compensating the reach loss in the fully inclusive channel. We show how the
searches for displaced vertices associated to LSP decay substantially increase
the coverage in supergravity parameter space, giving the corresponding reaches
for two reference luminosities of 10 and 100 fb and compare with those
of the R-parity conserving minimal supergravity model.Comment: Corrected version. To appear at JHE
Riqueza de espécies de fungos conidiais em duas áreas de Mata Atlântica no Morro da Pioneira, Serra da Jibóia, BA, Brasil
Search for jet extinction in the inclusive jet-pT spectrum from proton-proton collisions at s=8 TeV
Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published articles title, journal citation, and DOI.The first search at the LHC for the extinction of QCD jet production is presented, using data collected with the CMS detector corresponding to an integrated luminosity of 10.7 fb−1 of proton-proton collisions at a center-of-mass energy of 8 TeV. The extinction model studied in this analysis is motivated by the search for signatures of strong gravity at the TeV scale (terascale gravity) and assumes the existence of string couplings in the strong-coupling limit. In this limit, the string model predicts the suppression of all high-transverse-momentum standard model processes, including jet production, beyond a certain energy scale. To test this prediction, the measured transverse-momentum spectrum is compared to the theoretical prediction of the standard model. No significant deficit of events is found at high transverse momentum. A 95% confidence level lower limit of 3.3 TeV is set on the extinction mass scale