COMPARACIÓN ENTRE LA PROPUESTA GENERADAS POR EL MODELO DE SIMULACION DE RIEGO OPTIMIZADO CON UN RIEGO CONSTANTE EN CULTIVO DE ZANAHORIA EN BRASIL

[ES] Los modelos de simulación de cultivos son utilizados como herramientas de ayuda a la gestión de los recursos disponibles. Para el cultivo de la zanahoria, pocos trabajos han estudiado el efecto del riego deficitario sobre su rendimiento y la calidad de las cosechas. La metodología ORDI (optimized regulated deficit irrigation), integrada en el modelo MOPECO, optimiza la distribución del agua disponible para riego a lo largo del ciclo de un cultivo bajo condiciones de déficit. El estudio se realizó en un área experimental de SIPA - Integrado de Producción Agroecológica, que se encuentra en Seropédica-RJ, Brasil. El sistema de riego utilizado fue localizado por goteo, con un ramal por cada dos líneas de cultivo y un espaciamiento entre emisores de 10 cm, aportando un caudal de 4 litros metro-1 . Se evaluaron dos métodos de aplicación de riego deficitario, los llamados: CDI (nivel de déficit constante de agua) y ORDI (nivel de déficit variable optimizado por etapas). Para ambos métodos se aplicaron 6 relaciones ETa/ETm globales objetivo (1,0, 0,9, 0,8, 0,7, 0,6 y sin riego). En los dos años de ensayo no aparecieron diferencias estadísticamente significativas entre los rendimientos totales cuando se compararon las metodologías ORDI y CDI, para el mismo nivel de déficit. Sin embargo, un alto porcentaje de las raíces obtenidas con la estrategia CDI presentaron deficiencias en términos de calidad (malformaciones, tamaños inadecuados, grietas, etc) que ocasionaron una disminución del rendimiento comercial. En consecuencia, para un mismo volumen de agua de riego aplicado, la distribución del riego propuesta por ORDI fue más eficiente en términos de rendimiento comercial (llegando al 50% en el tratamiento 0,6 y de alrededor del 24% para el resto de tratamientos).Conceicao, B.; Carvalhoa, D.; Domínguez, A.; Tarjuelo, J.; Martínez-Romero, A. (2015). COMPARACIÓN ENTRE LA PROPUESTA GENERADAS POR EL MODELO DE SIMULACION DE RIEGO OPTIMIZADO CON UN RIEGO CONSTANTE EN CULTIVO DE ZANAHORIA EN BRASIL. En XXXIII CONGRESO NACIONAL DE RIEGOS. Valencia 16-18 junio de 2015. Editorial Universitat Politècnica de València. https://doi.org/10.4995/CNRiegos.2015.1433OC

De novo assembly and transcriptome analysis of five major tissues of Jatropha curcas L. using GS FLX titanium platform of 454 pyrosequencing

<p>Abstract</p> <p>Background</p> <p><it>Jatropha curcas </it>L. is an important non-edible oilseed crop with promising future in biodiesel production. However, factors like oil yield, oil composition, toxic compounds in oil cake, pests and diseases limit its commercial potential. Well established genetic engineering methods using cloned genes could be used to address these limitations. Earlier, 10,983 unigenes from Sanger sequencing of ESTs, and 3,484 unique assembled transcripts from 454 pyrosequencing of uncloned cDNAs were reported. In order to expedite the process of gene discovery, we have undertaken 454 pyrosequencing of normalized cDNAs prepared from roots, mature leaves, flowers, developing seeds, and embryos of <it>J. curcas</it>.</p> <p>Results</p> <p>From 383,918 raw reads, we obtained 381,957 quality-filtered and trimmed reads that are suitable for the assembly of transcript sequences. <it>De novo </it>contig assembly of these reads generated 17,457 assembled transcripts (contigs) and 54,002 singletons. Average length of the assembled transcripts was 916 bp. About 30% of the transcripts were longer than 1000 bases, and the size of the longest transcript was 7,173 bases. BLASTX analysis revealed that 2,589 of these transcripts are full-length. The assembled transcripts were validated by RT-PCR analysis of 28 transcripts. The results showed that the transcripts were correctly assembled and represent actively expressed genes. KEGG pathway mapping showed that 2,320 transcripts are related to major biochemical pathways including the oil biosynthesis pathway. Overall, the current study reports 14,327 new assembled transcripts which included 2589 full-length transcripts and 27 transcripts that are directly involved in oil biosynthesis.</p> <p>Conclusion</p> <p>The large number of transcripts reported in the current study together with existing ESTs and transcript sequences will serve as an invaluable genetic resource for crop improvement in jatropha. Sequence information of those genes that are involved in oil biosynthesis could be used for metabolic engineering of jatropha to increase oil content, and to modify oil composition.</p

Measurement of the cross-section for b-jets produced in association with a Z boson at root s=7 TeV with the ATLAS detector ATLAS Collaboration

A measurement is presented of the inclusive cross-section for b-jet production in association with a Z boson in pp collisions at a centre-of-mass energy of root s = 7 TeV. The analysis uses the data sample collected by the ATLAS experiment in 2010, corresponding to an integrated luminosity of approximately 36 pb(-1). The event selection requires a Z boson decaying into high P-T electrons or muons, and at least one b-jet, identified by its displaced vertex, with transverse momentum p(T) > 25 GeV and rapidity vertical bar y vertical bar < 2.1. After subtraction of background processes, the yield is extracted from the vertex mass distribution of the candidate b-jets. The ratio of this cross-section to the inclusive Z cross-section (the average number of b-jets per Z event) is also measured. Both results are found to be in good agreement with perturbative QCD predictions at next-to-leading order

Search for WH production with a light Higgs boson decaying to prompt electron-jets in proton-proton collisions at s\sqrt{s}=7 TeV with the ATLAS detector

A search is performed for WH production with a light Higgs boson decaying to hidden-sector particles resulting in clusters of collimated electrons, known as electron-jets. The search is performed with 2.04 fb-1 of data collected in 2011 with the ATLAS detector at the LHC in proton-proton collisions at $\sqrt{s}$=7 TeV. One event satisfying the signal selection criteria is observed, which is consistent with the expected background rate. Limits on the product of the WH production cross section and the branching ratio of a Higgs boson decaying to prompt electron-jets are calculated as a function of a Higgs boson mass in the range from 100 GeV to 140 GeV.Peer Reviewe

Measurement of W(+/-)Z production in proton-proton collisions at root s=7 TeV with the ATLAS detector

A study of W(+/-)Z production in proton-proton collisions at root s = 7 TeV is presented using data corresponding to an integrated luminosity of 4.6 fb(-1) collected with the ATLAS detector at the Large Hadron Collider in 2011. In total, 317 candidates, with a background expectation of 68 +/- 10 events, are observed in double-leptonic decay final states with electrons, muons and missing transverse momentum. The total cross-section is determined to be sigma(tot)(WZ) = 19.0(-1.3)(+1.4)(stat.) +/- 0.9(syst.) +/- 0.4(lumi.) pb, consistent with the Standard Model expectation of 17.6(-1.0)(+1.1) pb. Limits on anomalous triple gauge boson couplings are derived using the transverse momentum spectrum of Z bosons in the selected events. The cross-section is also presented as a function of Z boson transverse momentum and diboson invariant mass