Juan Marcelo Zabala

Juan Marcelo Zabala
Universidad Nacional del Litoral | UNL · Department of Plant Biology

Doctor en Ciencias Agrarias. Profesor Asociado Cátedra de Mejoramiento Genético (Universidad Nacional del Litoral). Investigador Adjunto (CONICET)

About

39
Publications
7,346
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199
Citations
Additional affiliations
January 2003 - January 2016
Universidad Nacional del Litoral
Position
  • Jefe de Trabajos Prácticos, Dedicación exclusiva

Publications

Publications (39)
Article
Full-text available
Restoration of wild plant populations in a changing environment is not a simple task, and it becomes increasingly complex and challenging in the context of climate change. In the present study, a spatiotemporal approach was used to delimit provisional seed transfer zones (STZs), for restoration activities involving two wild perennial grasses in Arg...
Article
La flora nativa posee un enorme potencial paisajístico que ha sido poco explorado. En el presente trabajo se han estudiado aspectos relacionados con las semillas y comportamiento germinativo de tres especies vegetales nativas del centro - norte santafesino con potencial ornamental priorizadas para su introducción a la producción en viveros en el mar...
Article
Full-text available
Santa Fe posee un número significativo de especies nativas con valor real o potencial para la producción agropecuaria, industrial y la protección ambiental. El primer paso para desarrollar una estrategia de uso eficiente de los recursos genéticos silvestres es el listado de las especies prioritarias a conservar. En este trabajo se analizan los recurs...
Chapter
The difficulties of genetic improvement of forage species are further complicated by the intricacies of salinity stress. Multiple evidence of the effects of salinity on germination and establishment highlight some of the limitations that must be overcome in order to carry out successful breeding programs for pastures. Different sources of variation...
Chapter
The forage value of several of the species occurring in saline soils of the southernmost portion of the American Chaco and particularly their genetic variability has been recognized by breeders from many countries. Such recognition is confirmed by the fact that accessions of these species are conserved in international germplasm banks specialized i...
Article
Native plant genetic resources have evolved from long processes of natural selection and adaptation to specific environments, and have developed tolerance to various stresses prevailing in their natural habitats via adaptive morphophysiological features. The associations between environmental stress conditions (aridity degree and salinity) prevaili...
Article
This is the first report about Na and K fluxes and heritability of Na exclusion in the Elymus genus. Argentine wheatgrass (Elymus scabrifolius) is an important forage genetic resource for saline environments. A previous study had shown salt‐sensitive lines accumulated toxic levels of Na in shoots. The aim of this study was to increase the understan...
Article
The use of wild halophytic species as forage resources in saline environments has gained increasing attention. Argentina ranks third in area of saline soils in the world, with a third of its territory showing various degrees of salinity, sodicity and/or alkalinity. On this type of soils, rangelands are the main forage resource for livestock product...
Article
Full-text available
Trichloris crinita y T. pluriflora son gramíneas perennes nativas de Argentina que presentan potencialidad productiva como forrajeras para regiones áridas y semiáridas. Los objetivos del presente trabajo fueron analizar para ambas especies las variaciones en la distribución y densidad estomática foliar ante dos regímenes hídricos diferentes y su as...
Article
Desmanthus virgatus (L.) Willd. has significant fodder potential, but its seeds have high and persistent levels of physical dormancy which interfere with its field establishment. The purpose of this study was to analyse the variability of physical dormancy in three populations of seeds from humid and arid regions of Argentina, grown and collected i...
Article
Background: Seed weight is a key fitness-related trait associated with plant adaptation and is commonly targeted in plant breeding. Aims: We evaluated seed weight variation within and between Trichloris crinita and Trichloris pluriflora across their geographical ranges in Argentina. Methods: Genetic variation in seed weight was evaluated through a...
Article
Full-text available
Melilotus albus Desr. is recognized as one of the species with greatest potential as a forage source for ruminants in saline rangelands. The objectives of the current research were threefold: (1) to estimate heritability and genetic correlation of traits associated with winter forage production and regrowth capacity in M. albus prebreeding material...
Article
Full-text available
Lotus tenuis Waldst. & Kit es una leguminosa perenne tolerante a la salinidad, con difi cultades en su implantación en el centro-norte de Argentina debido al estrés térmico e hídrico sufrido durante el verano. En el presente estudio se evaluó el comportamiento germinativo y crecimiento inicial de una población naturalizada de L. tenuis del centro-n...
Article
Full-text available
Los Bajos Submeridionales constituyen una extensa área del norte de Argentina que abarca cerca de 5 millones de has en las provincias de Santa Fe, Chaco y Santiago del Estero. La principal actividad productiva de los Bajos Submeridionales, y de los ambientes salinos en general, es la ganadería, la que se realiza en forma extensiva basada en el uso...
Article
Full-text available
Melilotus albus is a naturalized legume in Argentina and is recognized as a species with great potential to be used as forage source. Coumarin derivates are found in significant amounts in this species. This study was designed to evaluate the effect of materials with different coumarin content on: a) morphological traits associated with plant vigou...
Article
Full-text available
Sporobolus phleoides Hack. is an endemic grass of Argentina that is considered an important genetic resource for saline environments. Knowledge of its germination behaviour is an indispensable requirement for the future potential use of this species. Thus, the effects of different factors on germination were evaluated in six representative populati...
Article
Full-text available
Desmanthus paspalaceus (Lindm.) Burkart belongs to the D. virgatus complex, subfamily Mimosoidae. The known potential as livestock fodder of several of these legumes prompted us to undertake a phenotypic, molecular, and symbiotic characterization of the D. paspalaceus symbionts in the Santa Fe province, Argentina. The rhizobia collected-containing...
Article
Full-text available
In Argentina, species of the genus Trichloris represent an important native forage resource adapted to drought and salinity. The capture and identification of adaptive traits associated with such conditions require long-term collection and characterization efforts. Ecogeographical land characterization (ELC) maps constitute an easy and useful tool...
Article
Full-text available
Bromus auleticus is known for its qualities as forage but its domestication has limitations relating to seed production technology and farm-scale seed propagation. The effect of different combinations of population on the reproductive success and seed germination of a relict population of Argentina was studied. The tests used a population of Santa...
Article
Full-text available
Germinative behavior and forage potential of Setaria magna (Poaceae). Setaria magna Griseb. is an American species that grows well in damp, swampy environments either in fresh or salt water. It is an annual, grass with vigorous plants in their natural habitat. In this study the germinative behavior as well as the forage potential of this species we...
Article
Full-text available
Setaria magna Griseb. is an American species that grows well in damp, swampy environments either in fresh or salt water. It is an annual, grass with vigorous plants in their natural habitat. In this study the germinative behavior as well as the forage potential of this species were evaluated. Caryopses viability and their germination ability at dif...
Conference Paper
Full-text available
La superficie sembrada con pasturas megatérmicas en Argentina se ha incrementado marcadamente. Esto es debido, en parte, al desplazamiento de la ganadería hacia zonas extra-pampeanas y a la intensificación de la actividad ganadera. El objetivo de este ensayo fue evaluar características productivas de 8 cultivares de spp. megatérmicas al primer cort...
Article
Full-text available
Melilotus albus is recognised as an important source of forage for ruminant animals in rangelands, particularly some of the germplasm of Melilotus collected in Argentina. This study was designed to evaluate the effects of 2 years of selection in M. albus for late flowering and branching on forage yield in a 2-year field plot experiment and to evalu...
Article
Full-text available
Setaria lachnea is recommended for its introduction to cultivation due to its qualities as native forage, for which variation of traits with agronomic importance in nine native populations of Argentina was analyzed. The variables were height of shoot and length and width of leaves, flowering phenology through the date of panicle emergence, fertilit...
Article
Full-text available
Setaria lachnea is recommended for its introduction to cultivation due to its qualities as native forage, for which variation of traits with agronomic importance in nine native populations of Argentina was analyzed. The variables were height of shoot and length and width of leaves, flowering phenology through the date of panicle emergence, fertilit...
Article
Full-text available
Trichloris is an American genus with two species: T. crinita (Lag.) Parodi and T. pluriflora E. Fourn. Both species are perennial warm season grasses and valued as forage. The objective of our study was to determine the effect of different temperatures, seed weight and maternal effect (i.e., the contribution of the female parent to the offspring ph...
Article
Full-text available
Elymus scabrífolius es una gramínea perenne nativa de Sudamérica, considerada como potencial recurso forrajero para suelos con limitantes edáficas. Los objetivos de este trabajo fueron analizar la variación genética existente para caracteres agronómicos y determinar patrones de variación fenotípica para 17 accesiones y un cultivar comercial, median...
Article
Full-text available
Abstract Elymus scabrifolius is a native C3 South American grass species. It is valued as forage species adapted to various environments in Argentina and is also a potential source of traits for wheat-breeding programmes. Efficient utilization of native genetic resources requires extensive collection and characterization of available material. The...
Article
Full-text available
En la actualidad, una prioridad para mejorar la producción ganadera en el centro-norte de Argentina es la búsqueda de leguminosas forrajeras adaptadas a la región.Este trabajo tuvo como objetivos: a) analizar la variabilidad de caracteres morfológicos relacionados con el crecimiento inicial en poblaciones de dos especies de forrajeras nativas, Desm...
Article
Full-text available
Setaria lachnea, moha perenne, es una gramínea nativa con excelentes cualidades forrajeras por lo que se recomienda su introducción al cultivo. Por tanto, en el presente estudio se analizó la variabilidad en la fenología de la floración y en el éxito reproductivo en genotipos de tres poblaciones argentinas, provenientes de distintos lugares por gra...
Article
Full-text available
Setaria lachnea, moha perenne, is a native grass with excellent forage quality; thus, its introduction to cultivation has been recommended. Therefore, in the present study, the variability in flowering phenology and reproductive success of three Argentine populations from different places by altitudinal gradient have been analyzed, with respect to...
Article
Full-text available
The search for forage legumes to improve animal production is a priority in the centre-north of Argentina. This study aims to determine the variability for morphological traits related with the early vegetative growth in populations of two native forage legumes, Desmanthus virgatus y D. paspalaceus and analyze their field establishment in two envir...
Article
Full-text available
The objective of this study was to determine the effect of different germination temperatures and dry storage on the germinative behaviour of E. scabrifolius. Seeds of three lines from different populations, which showed contrasting germinative behaviour in preliminary experiments, were incubated under four temperature regimes: 15°C, 20°C, 15-20°C...
Article
Full-text available
Elymus scabrifolius is a South American species, valued as a forage resource in areas with soil limitations. The objective of this study was to determine the effect of different germination temperatures on the germinative behaviour of twenty representative lines of E. scabrifolius from four different habitats. The results suggest that in E. scabrif...
Article
Full-text available
The Argentine germplasm of the Desmanthus virgatus complex is a valuable group of legume species for animal production. However, little is known about the extent and nature of the variability of these species. This study, which is an introduc-tion to further ones about the variability of these species, aims at: a) collecting representative germ-pla...

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Projects

Projects (3)
Project
Evaluar el impacto del cambio climático en la distribución de Trichloris crinita en Argentina e implementar un sistema de zonas de transferencia de germoplasma entre condiciones ambientales presentes y sus análogas a futuro (ante el cambio climático), implementando modelos de distribución simples y ensamblados (Species Distribution Models, SDM) para Trichloris crinita en Argentina, proyectados sobre información ambiental de presente y futuro para clasificar el territorio argentino en función del impacto que el cambio puede generar en la distribución de la especie y elaborando mapas de caracterización ecogeográfica del territorio (Ecogeographical Land Characterization, ELC) para condiciones bioclimáticas de presente y de futuro para establecer zonas de transferencia de germoplasma.