Changes in Number and Weight of Wheat and Triticale Grains to Manipulation in Source-Sink Relationship

The source-sink ratio experimental manipulation has helped to define whether a crop is limited by source or sink or co-limited by both. There is no evidence in triticale of source-sink manipulations effects on yield and yield components. Two experiments were accomplished during 2008 and 2009 growing seasons at the Universidad Autónoma del Estado de México, México, and one in 2010 at the National Institute of Agricultural Technology in Pergamino, Argentina. Two triticale cultivars (line 4 and 7) and one wheat cultivar (Tollocan) were used. Source-sink relations were modified at anthesis by thinning, degraining, shading, and total defoliation procedures. Changes in the source-sink relation affected yields in both species differentially. The changes in yield due to cultivars and treatments were explained mainly by the number of grains rather than by their individual grain weight. The number of grains was affected by all treatments in both species, while the individual grain weight was increased by thinning and degraining mainly in triticale. A greater number of fertile florets in triticale were associated with their higher rate of abortion compared to wheat. These results could help to better understand crop management and genetic improvement.Fil: Ballesteros Rodriguez, E.. Universidad Nacional Autónoma de México; MéxicoFil: Martinez Rueda, C.G.. Universidad Nacional Autónoma de México; MéxicoFil: Morales Rosales, E.J.. Universidad Nacional Autónoma de México; MéxicoFil: Estrada Campuzano, G.. Universidad Nacional Autónoma de México; MéxicoFil: González, Fernanda Gabriela. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Norte. Estación Experimental Agropecuaria Pergamino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Efficiency on the Use of Radiation and Corn Yield under Three Densities of Sowing

Aiming to evaluate sowing densities and efficiency of radiation use, six corn genotypes, three from open pollination (“Amarillo Almoloya,” “Cacahuacintle,” and “Jiquipilco”) and three hybrids (“Z-60,” “Condor,” and “H-50”), were sown at densities of 6.9, 7.8, and 8.9 plants m−2, under a split plot design, within a factorial arrangement of treatments during three years (2008, 2009, and 2010). Evaluated variables were yield, harvest index, biomass production, attenuation coefficient, and radiation use efficiency. Results indicate that 2008 was the best year because yield, biomass, and radiation use efficiency were 1132.6, 3505 gm−2, and 0.79 g MJ−1, respectively. “Jiquipilco” was the genotype that exhibited the best adaptability to climatic conditions of the zone; thus, it is recommended to be grown on the studied zone

CIBERER : Spanish national network for research on rare diseases: A highly productive collaborative initiative

Altres ajuts: Instituto de Salud Carlos III (ISCIII); Ministerio de Ciencia e Innovación.CIBER (Center for Biomedical Network Research; Centro de Investigación Biomédica En Red) is a public national consortium created in 2006 under the umbrella of the Spanish National Institute of Health Carlos III (ISCIII). This innovative research structure comprises 11 different specific areas dedicated to the main public health priorities in the National Health System. CIBERER, the thematic area of CIBER focused on rare diseases (RDs) currently consists of 75 research groups belonging to universities, research centers, and hospitals of the entire country. CIBERER's mission is to be a center prioritizing and favoring collaboration and cooperation between biomedical and clinical research groups, with special emphasis on the aspects of genetic, molecular, biochemical, and cellular research of RDs. This research is the basis for providing new tools for the diagnosis and therapy of low-prevalence diseases, in line with the International Rare Diseases Research Consortium (IRDiRC) objectives, thus favoring translational research between the scientific environment of the laboratory and the clinical setting of health centers. In this article, we intend to review CIBERER's 15-year journey and summarize the main results obtained in terms of internationalization, scientific production, contributions toward the discovery of new therapies and novel genes associated to diseases, cooperation with patients' associations and many other topics related to RD research

EFICIENCIA EN EL USO DE LA RADIACIÓN POR HÍBRIDOS DE MAÍZ DE VALLES ALTOS DE MÉXICO

"En maíz (Zea mays L.), la intercepción y utilización de la radiación solar a nivel de cultivo son dos procesos que influyen en la producción de biomasa y el rendimiento de grano. El objetivo de esta investigación fue estudiar el impacto de la fecha de s

Changes in Number and Weight of Wheat and Triticale Grains to Manipulation in Source-Sink Relationship

The source-sink ratio experimental manipulation has helped to define whether a crop is limited by source or sink or co-limited by both. There is no evidence in triticale of source-sink manipulations effects on yield and yield components. Two experiments were accomplished during 2008 and 2009 growing seasons at the Universidad Autónoma del Estado de México, México, and one in 2010 at the National Institute of Agricultural Technology in Pergamino, Argentina. Two triticale cultivars (line 4 and 7) and one wheat cultivar (Tollocan) were used. Source-sink relations were modified at anthesis by thinning, degraining, shading, and total defoliation procedures. Changes in the source-sink relation affected yields in both species differentially. The changes in yield due to cultivars and treatments were explained mainly by the number of grains rather than by their individual grain weight. The number of grains was affected by all treatments in both species, while the individual grain weight was increased by thinning and degraining mainly in triticale. A greater number of fertile florets in triticale were associated with their higher rate of abortion compared to wheat. These results could help to better understand crop management and genetic improvement

VARIABILIDAD GENOTÍPICA EN ATRIBUTOS ECOFISIOLÓGICOS DEL RENDIMIENTO Y CALIDAD INDUSTRIAL DE CANOLA

"El objetivo del presente experimento fue analizar el comportamiento fenológico, rendimiento y calidad de la semilla de siete cultivares de canola (Hyola-61, Bio-Aureo, Gladiator, Inifap-2, Inifap-3, Inifap-4 e Inifap-5). El experimento se llevó a cabo e

ÍNDICE DE VERDOR DE LISIANTHUS (Eustoma grandiflorum (Raf.) Shinners) EN FUNCIÓN DE LA CONCENTRACIÓN DE 6-BENCILAMINOPURINA

"El manejo del color del follaje es de gran importancia en las especies ornamentales. El objetivo de la presente investigación fue evaluar en lisianthus (Eustoma grandiflorum (Raf.) Shinners) en precosecha el índice de verdor en los estratos inferior, me

Mujeres y Emancipación de la América Latina y el Caribe en los siglos XIX y XX

La determinación adoptada por los gobiernos de la región para conmemorar el inicio de los movimientos y guerras que condujeron a la mayor parte de los países que hoy llamamos Latinoamérica a alcanzar la independencia del yugo colonial, fue un acuerdo basado más en la coincidencia o cercanía de algunas fechas que en una simultaneidad estrictamente cronológica. Este volumen da cuenta de las anticipaciones, retrasos y continuidades de un proceso emancipatorio aún por completar; de la participación que en él tuvieron y tienen las mujeres, de sus liderazgos, vivencias, estrategias y perspectivas; así como de su representación por la literatura y el arte, y de su apreciación por la historiografía de más variada naturaleza o por quienes descubren las entretelas y la manipulación de estas efemérides. Los textos aquí reunidos se dividen en dos secciones: la primera agrupa a los que se relacionan con distintos momentos del proceso de emancipación latinoamericana y de sus mujeres; la segunda, sobre distintas escritoras italianas contemporáneas, está dedicada a Alba de Céspedes, autora de origen cubano que vivió entre Roma y París, y cuyo abuelo iniciara las guerras de independencia de la Isla en 1868. La valiosa concurrencia de firmas internacionales en esta miscelánea se debe al auspicio del Programa de Estudios de la Mujer de la prestigiosa institución cultural Casa de las Américas de Cuba, destinado a dar visibilidad a la trayectoria histórica y, a las manifestaciones culturales de las mujeres latinoamericanas y caribeñas, a promover el trabajo de sus artistas y escritoras contemporáneas, así como a discutir los temas teóricos correspondientes, y sus contextos de producción y recepción