Genetic Potential and Usefulness of Native Maize Populations in Developing Novel Germplasm for Current and Upcoming Goals

Traditional agricultural system is referring to the maize production based on indigenous or farmers knowledge and practices that have been developed through many generations. In the area of study, genetic maize diversity was explored by the expression of quantitative traits of the ear and the race classification approach. Evaluation results indicated that the native populations adapted to the transition and highland (above 2000 masl) areas, showed a contrasting yield response when they were evaluated at the intermediate environment; whereas, those populations adapted to the lowland and intermediate altitudes showed a satisfactory yield performance in both environments. The above performance pattern is essential because it may be useful to identify favorable alleles that, in a local population per se or through genetic combination, results in population changes in allele frequencies that could mitigate the effects of climate changes, particularly in maize populations adapted to highland altitudes. Selection procedures applied to a local adapted population can be managed attending different goals, including the conservation of genetic diversity (per se selection), and to develop novel germplasm. The introgression of foreign germplasm into a local population and the application of three selection cycles resulted in a novel variety (JAGUAN) adapted to a regional northeast Mexico environmental conditions

Decoherence in a double-slit quantum eraser

We study and experimentally implement a double-slit quantum eraser in the presence of a controlled decoherence mechanism. A two-photon state, produced in a spontaneous parametric down conversion process, is prepared in a maximally entangled polarization state. A birefringent double-slit is illuminated by one of the down-converted photons, and it acts as a single-photon two-qubits controlled not gate that couples the polarization with the transversal momentum of these photons. The other photon, that acts as a which-path marker, is sent through a Mach-Zehnder-like interferometer. When the interferometer is partially unbalanced, it behaves as a controlled source of decoherence for polarization states of down-converted photons. We show the transition from wave-like to particle-like behavior of the signal photons crossing the double-slit as a function of the decoherence parameter, which depends on the length path difference at the interferometer.Comment: Accepted in Physical Review

Análisis biomecánico de la esgrima mediante sistemas optoelectrónicos de análisis de movimiento. Estudio de caso: deportista de alto rendimiento

En este artículo se presenta el estudio de la técnica deportiva para esgrima por medio de un análisis biomecánico, realizado con ayuda de sistemas optoelectrónicos que capturan en tiempo real los dos gestos más destacados, el paso adelante y el fondo, con el objetivo de caracterizar digitalmente la biomecánica para su posterior análisis cinemático y de esta manera describir la técnica que tiene el deportista en la ejecución del movimiento. Con este estudio se lograron caracterizar de una forma cuantitativa las curvas de posición, ángulos articulares, velocidades y aceleraciones de cada uno de los marcadores situados en el cuerpo del deportista. Este estudio se realizó en un deportista de alto rendimiento, destacado en la modalidad de espada.This article presents the study of fencing techniques through biomechanical analysis, using optoelectronic systems that capture in real time two main gestures: advance and lunge, with the objective to digitally characterize the biomechanics, for its further kinematical analysis to describe the fencer’s technique in the movement execution. This study was made to characterize position curves, joint angles, velocity and acceleration of each of the markers located on the athlete’s body, in a quantitative manner. This study was developed on a high performance athlete in sword modalit

Molecular stratigraphic analysis with raman spectroscopy of the shell of a mussel

Peer Reviewe

Recommendations for Future Articles on Knowledge, Attitudes and Practices in IJMS

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