María Gabriela Cendoya

Universidad Nacional de Mar del Plata | UNMDP · Facultad de Ciencias Agrarias

We monitored grazing behavior and habitat selection of Argentine Criollo (AC), South American heritage cattle breed, and Angus (AA) cows during summer and winter of 2016 (wetter year) and 2017 (drier year) at a site in La Rioja, Argentina. In each year and season, five AC and five AA cows were fitted with GPS collars configured to log animal positi...

In breeding for resistance to Fusarium head blight (FHB) there should be precise differentiation between QTL for resistance and those for spike architecture traits that indirectly affect disease. QTL mapping for FHB Type II resistance and spike architecture traits was carried out in a population of 80 RIL. Three QTL for FHB Type II resistance were...

An ecological intensification of agriculture through the use of green bridge crops (GBC) between cash crops is a way to improve resource use efficiency. This study aimed to assess vetch (Vicia villosa Roth.) (Ve), oat (Avena sativa L.) (Oa), Oa+Ve as GBC, and a control without GBC, with different termination dates (early and late), tillage systems...

Fusarium head blight (FHB) remains a devastating disease in bread wheat (Triticum aestivum L.). Genetic resistance to FHB is complex; aside from active physiological resistance, plant developmental and morphological traits indirectly affect disease progression and provide a passive resistance mechanism. Here, the relationship between FHB Type II re...

Fusarium head blight (FHB) remains a devastating disease in bread wheat (Triticum aestivum L.) and other small grains. Genetic resistance to FHB is a complex trait; in addition to active physiological resistance, plant developmental and morphological traits may indirectly affect disease progression and provide a passive mechanism of resistance. In...

The identification of sources of resistance to Fusarium head blight (FHB) in bread wheat is key to the sustainable management of the disease. An accurate characterization of resistance is critical; however, the experimental designs commonly used disregard germplasm variability in anthesis date (moment of highest disease susceptibility). Here, an ac...

Sunflower is usually affected by white rot (WR), a disease produced by Sclerotinia sclerotiorum . Thus, breeders select WR resistant hybrids by means of field experiments replicated in different environments. The WR selection will be effective when the correlation between the phenotype and the set of genes controlling the trait is high. This study...

a Fusariosis de la espiga (FE) causada por Fusarium grami-nearum es una enfermedad destructiva en las regiones cerealeras del mundo. Durante muchos años fue considerada una enfermedad de importancia secunda-ria en la Argentina. Sin embargo, debi-do al aumento de su frecuencia de aparición y severidad en el Cono Sur, actualmente representa una de la...

Water stress is the most significant environmental stress in agriculture worldwide. Potato (Solanum tuberosum L.) is a drought‐susceptible crop. Water stress tolerance is a complex trait of increasing importance in potato. The objective of this work was to evaluate the differential response strategies associated with water stress tolerance in a hig...

La Fusariosis de la espiga de trigo (FET), causada por Fusarium graminearum Schwabe es una de las enfermedades fúngicas más importantes del cultivo a nivel mundial. El empleo de cultivares resistentes juega un papel clave en el manejo integrado de la FET. Sin embargo, las fuentes de resistencia identificadas a la fecha son escasas y mayormente de o...

La Fusariosis de la espiga de trigo (FET), causada por Fusarium graminearum Schwabe es una de las enfermedades fúngicas más importantes del cultivo a nivel mundial. El empleo de cultivares resistentes juega un papel clave en el manejo integrado de la FET. Sin embargo, las fuentes de resistencia identificadas a la fecha son escasas y mayormente de o...

En Argentina existen numerosos estudios aconsejando como utilizar el silo bolsa, sin embargo no se ha analizado la manera en que los productores usan realmente esta tecnología. El objetivo de este trabajo es caracterizar el uso del silo bolsa por parte de los productores en la provincia de Buenos Aires, identificar puntos críticos en su uso y señal...

In Argentina, many recommendations have been made about how silo bags should be used, but there is no systematic information on how farmers actually use this technology to store their grain. The objective of this study was to characterize the use of silo bags in Buenos Aires province, pointing out critical aspects and identifying a research agenda....

The rapid increase of the overall grain production of Argentina resulted with a storage capacity deficit in permanent structures of 40 to 50 million tons, and this context favored the rapid adoption of the silo bag technology. Silo bag allows differing grain selling from harvest time, taking advantage of the seasonal price changes and, hence, impro...

Spike fertility index (SF) has been proposed as a promising trait to be used as a selection criterion in wheat breeding programs aimed at increasing grain yield, but no actual evidence of its successful application has been reported. In this study, 146 recombinant inbred lines derived from a cross between ‘Baguette 10’ and ‘Klein Chajá’, Argentinea...

Using the right equilibrium moisture content (EMC) relationship is critical for implementing successful aeration strategies and for determining the safe storage moisture content of grains and oilseeds. The oil content of sunflower seeds substantially affects the moisture equilibrium relationship, implying that a specific set of model parameters for...

La Fusariosis de la espiga de trigo (FET) es una de las enfermedades fúngicas más importantes entre las que afectan a este cultivo. En Argentina, el principal agente causal es Fusarium graminearum Schwabe. El empleo de cultivares resistentes es la estrategia de control más adecuada. Las escasas fuentes de resistencia identificadas a la fecha son ma...

La Fusariosis de la espiga de trigo (FET) es una de las enfermedades fúngicas más importantes entre las que afectan a este cultivo. En Argentina, el principal agente causal es Fusarium graminearum Schwabe. El empleo de cultivares resistentes es la estrategia de control más adecuada. Las escasas fuentes de resistencia identificadas a la fecha son ma...

Stem base canker caused by Leptosphaeria maculans (SBC) has been reported to affect canola production worldwide. Ascospores infections produce leaf spots (LS) in early vegetative stages. From these initial spots, the fungus grows towards the stem crown and may cause SBC, lodging and premature ripening at maturity. Growth stage at LS presence, culti...

The nature of spatial and temporal dynamics of Tomato spotted wilt virus (TSWV) and its vector in a potato crop cv. Innovator without insecticide application is analysed. Seed tuber was analysed for the presence of TSWV as a source of initial inoculum. The presence of plants with symptoms of TSWV was evaluated by visual observation and DAS-ELISA an...

Land use change affects soil organic carbon (SOC) and generates CO2 emissions. Moreover, SOC depletion entails degradation of soil functions that support ecosystem services. Large areas covered by dry forests have been cleared in the Semiarid Chaco Region of Argentina for cropping expansion. However, deforestation impacts on the SOC stock and its d...

Distribución espacial del pastoreo de ganado bovino, en raza Criolla argentina y Aberdeen angus eco tipo riojano en pastizales naturales de La Rioja. Spatial distribution of cattle, breed Creole Argentina and Aberdeen angus type-riojano on natural grassland of La Rioja province. Introducción Los llanos de La Rioja ocupan alrededor de 5.000.000 has,...

Con el objeto de caracterizar las poblaciones fúngicas, en particular las especies potencialmente micotoxigénicas, que pueden contaminar los granos de maíz almacenados en silos bolsa con un contenido de humedad superior al recomendado como seguro, se evaluaron 270 muestras extraídas al inicio, a los 90 días y al final de un período de almacenamient...

The adsorption and desorption equilibrium moisture content/equilibrium relative humidity relationships of sunflower seeds with four different oil contents (35.7%, 44.6%, 48.6% and 52.7%) were obtained for temperatures of 8, 15, 25 and 35° C and moisture contents of 6.0%, 8.5%, 11.0%, 13.5%, 16.0% and 18.5%.The goodness of fit of four equilibrium mo...

In wheat, grain number is considered as the product of spike dry weight (SDW) and the number of grains per unit of SDW, that is an indicator of spike fertility (SF). The aim of this study was to determine the heritability of SF and the effect of early selection for high SF on its relationship with other spike yield components. Two field experiments...

Although disease severity is a continuous variable, it is often measured using numerical scales (scores) which usually range between 3 and 9 categories. A disease score is a subjective perception of the disease severity and is prone to intraobserver and interobserver errors, which can be sometimes of considerable magnitude. The search of disease re...

Soil organic carbon (SOC) plays a vital role in determining soil quality and health, but also SOC decrease contributes significantly to the increase in atmospheric CO2 concentration. Countries need to quantify their SOC stocks and flows in order to assess their greenhouse gas emissions. To facilitate this, the Intergovernmental Panel on Climate Cha...

RESUMEN En la literatura existe escasa información sobre estudios de precisión (repetitividad) en la estimación de capacidad de sorción de fósforo (P), utilizando el Índice de Sorción de P (ISP). Para realizar el análisis se emplearon muestras compuestas de 5 cm superficiales de 4 suelos molisol con agricultura y distintas características edáficas....

Neotyphodium coenophialum is an endophyte fungus living in a mutualistic symbiosis with tall fescue [Schedonorus arundinaceus (Schreb.) Dumont]. The endophyte infection affects both health and animal production given the toxicity of the infected plants (fescue toxicosis). Our objective was to determine the incidence of N. coenophialum in some fescu...

Sweet cherries (Prunus avium L.) are non-climacteric fruit so they must be harvested once the typical changes of colour and soluble solids content associated with maturity have occurred. Fruit skin colour is a maturity index used to decide the harvest time, which depends on cultivar. The aims of this work were to study heterogeneity of fruit colour...

Los estudiantes de primer año que cursan la carrera de Ingeniería Agronómica provienen de un universo amplio en términos geográficos, educacionales y culturales. El objetivo de este trabajo es determinar si existen diferencias en el rendimiento académico de los estudiantes en la asignatura Introducción a las Ciencias Agrarias (ICA) atribuibles al c...

La utilidad del uso de las solaria (láminas de plástico de 1 por 1m), para predecir las densidades de algunas especies de maleza en cultivos de verano ha sido demostrada previamente, pero se requiere más investigación para que esta práctica sea adoptada por los agricultores y sus asesores. Evaluamos el método para detectar malezas importantes en Ar...

The grey field slug Deroceras reticulatum has become a pest in no tillage sunflower (Helianthus annuus L.) and soybean (Glycine max L.) crops in the southeast of Buenos Aires province, Argentina. Ground beetles (Coleoptera: Carabidae) are an important component of the arthropod community in agricultural systems and have the potential to reduce pest...

Soybean and annual weed competition studies were conducted over 2 yr in Balcarce, Argentina, to define the critical period of weed control and to compare yield losses in soybean, when weeds competed in the total cropping area (row plus furrow) or only in the furrow. In the first year, broad-leaf weeds were more abundant than annual grasses, but in...

At locations in Argentina and the United States, solaria (miniature, portable, plastic green- houses or a plastic sheet approximately 1 m2) were placed on field soils in autumn or late winter in an attempt to predict summer annual weed densities. Initial emergence of summer annual weeds covered by solaria commenced weeks before that of weeds in exp...

Se caracterizó el régimen de heladas meteorológicas y agrometeorológicas de la localidad de Balcarce, para el período 1970-1999, en escala anual, mensual y decádica, a través de estadísticos descriptivos y gráficos. Se ajustaron curvas de tendencia en las fechas de primera y última helada a lo largo de los años observándose para la ultima década un...

En la Argentina, el raigrás es la tercera gramínea forrajera más importante. Las partidas comerciales de semillas de Lolium perenne L. (raigrás perenne) están generalmente contaminadas con semillas de Lolium multiflorum Lam. (raigrás anual), lo que disminuye su valor agronómico y económico. La identificación rápida de las dos especies por la morfol...