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Combining Ability and Heterosis in Corn Breeding Lines to Forage and Grain

American Journal of Plant Sciences 2014年第6期5卷 845-856页

作者： cesar Guerrero Guerrero Miguel A. Gallegos Robles José Guadalupe Luna Ortega Ignacio Orona Castillo Cirilo Vázquez Vázquez Mario García Carrillo Alejandro Moreno Resendez Anselmo González torres Catederatico de la Universidad Politécnica de la Región Laguna México Catederaticos de la UAAAAUL Torreon México Direccion General de Educación Tecnológica Industrial Torreón México Universidad Juárez del Estado de Durango Venecia Dgo México

This study was conducted in two stages, in 2006 the formation of cross, in the experimental field of the Universidad Autonoma Agraria Antonio Narro Unidad Laguna (UAAANUL), and the evaluation of the same in 2007;at two locations with three environments, a locality was the experimental field of UAAANUL during spring and summer cycles and another location was the Niagara, Municipality of Aguascalientes, during the spring cycle. The genetic material used consisted of three groups of lines: the first group formed by four lines from the UAAANUL, the second group, two lines from INIFAP, and the third group, 10 lines of the International Center for Maize Improvement and Wheat (CIMMYT). The main objective was to estimate the effects of general combining ability (GCA) of the lines, and the specific combining ability (SCA) of their crosses and heterosis, to estimate its use in a breeding program. Estimates of general combining ability (GCA) and specific combining ability (SCA) were obtained using an analysis of line x line. To forage yield (FY), B-40 (16.84 t·ha-1) and AN-447 (1.54 t·ha-1) and to grain yield (GY), AN-388R (2.31 t·ha-1) had the greatest effect of GCA in both types of yield. The greatest effects of SCA for (FY) were cross AN-447XCML-264 (17.56 t·ha-1) and AN-388RXCML-319 (16.54 t·ha-1), in (GY) were cross AN-447XCML-315 (1.94 t·ha-1) and B-40XCML-319 (1.78 t·ha-1). For heterosis, higher value in forage yield was cross AN-447XCML-264 (20.7%), in grain yield, were B-40XCML-319 (27.1%) and B-32XCML-319 (22.1%) crosses. These results show that it is possible to structure a hybrid program using best lines from CIMMYT, INIFAP and UAAANUL.

关键词： Zea mays L. Hybrids Genetic Material Crosses SCA

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Prognosis of Patients with Acute Coronary Syndromes and Bleeding—The Importance of Routine Use of a Bleeding Risk Score

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World Journal of Cardiovascular Diseases 2015年第12期5卷 327-334页

作者： Alexandre de Matos Soeiro Ricardo cesar Campos Devezae Silva Aline Siqueira Bossa Cindel Nogueira Zullino Tatiana de Carvalho Andreucci torres Leal Maria Carolina Feres de Almeida Soeiro Carlos V. Serrano Jr. Múcio Tavares Oliveira Jr. Emergency Unit-Heart Institute University of Sao Paulo Medical School Sao Paulo Brazil

Introduction: Recent studies showed relation between mortality and bleeding in acute coronary syndromes. Objective: The objective is to analyze the prognosis of patients with acute coronary syndromes with or without in-hospital major and/or minor bleedings. Methods: This was a pro-spective data bank analysis study with 546 patients (39 with bleeding (group I) and 507 without bleeding (group II)) with acute coronary syndromes included between May 2010 and May 2013. Besides, Mehran bleeding risk score was calculated to all patients. The primary endpoint was all causes of in-hospital death and combined events. Comparison between groups was made by Anova and Q-square. Multivariate analysis was determined by logistic regression and was considered significant when p p = 0.005) and combined events (35.9% vs 11.4%, p < 0.001). The same results were observed in multivariate and long-term analysis. Con-clusions: Almost half of patients with acute coronary syndromes had higher risk of bleeding, and that with major or minor bleedings had greater deaths and combined events.

关键词： Unstable Angina Bleeding Acute Myocardial Infarction

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Sustainable Potato Production in the Mountain Area of Ecuador, an Approach to Increase Productivity with Small Scale Farmers

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Agricultural Sciences 2022年第10期13卷 1080-1090页

作者： Alicia Villavicencio Chang Hwan Park Kangjin Cho Rona Bae Diego Peñ aherrera Gabriela Narváez Victoria López José Camacho Jovanny Suquillo Fausto Yumisaca cesar Asaquibay María Nieto David Ortega Verónica Quimbiamba Cristian torres Edwin Naranjo Stalin Cuenca Ricardo Alvarez Korean Program on International Agriculture and Technology—KOPIA Quito Ecuador Instituto Nacional de Investigaciones Agropecuarias—INIAP Quito Ecuador Extension Services KOPIA-INIAP Quito Ecuador

Ecuador potato crop is family based production system. Potato production has two roles in their economy, the first is providing food for their families and the second is a source of income for the household. However small scale farmers have limited access to local markets and most of the sales are through intermediates’ who purchase directly in the field at the lowest price possible. Potato production challenges for the small-scale farmers are among others availability of quality potato seed, direct sales, purchase of agrochemical inputs to maintain their crops and lack of education. In 2021, only 4% of potato farmers used certified seed. Potato yield is still low around 16.1 t·ha-1, in the last 10 years the total potato cultivated area was reduced by at least 50%. The farmers produce “Bokashi” and other organic fertilizer and these are effective to improve soil fertility and plant health. Homemade bio-pesticides reduce agrochemical pesticides. The Decision Support System (DSS) is a handheld device to control late blight, minimizes fungicide applications and improve fungicide rotation. In 2018 Candidatus Liberibacter solanacearum (Lso), the causal agent of zebra chip, and its vector, the potato psyllid Bactericera cockerelli, together created havoc for farmers and researchers. Promotion of early potato varieties INIAP—Libertad is an alternative to lower the impact of this newest pest.

关键词： Potato Yield Small-Scale Farmers Agro-Ecological Production Quality Seed

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