Miguel Cantamutto - Academia.edu (original) (raw)
Papers by Miguel Cantamutto
Journal of Arid Environments, Feb 1, 2023
Journal of Applied Entomology, Nov 24, 2021
Alfalfa (Medicago sativa L. 1753) is one of the main forage crops of the world, and the availabil... more Alfalfa (Medicago sativa L. 1753) is one of the main forage crops of the world, and the availability of an adequate seed supply to farmers is one of the main concerns for the seed industry. The international alfalfa seed trade is widespread and several countries depend on imported seed. The continued importation of alfalfa seed carries a serious risk of unintentional introductions, such as contamination by genetically engineered (GE) alfalfa. We evaluated: (i) GE contamination in the main alfalfa seed production area of Argentina by analysing 263 conventional bulk seed lots (~900 tonnes) and feral populations (n = 49) over a 5‐year period (2016–2021); and (ii) the location of alfalfa fields near natural vegetation formations as a pollination management strategy to increase the local seed production. Although GE alfalfa seed fields are prohibited, contamination was present in commercial seed lots (5.58% to 23.25%) and in feral alfalfa populations (8.16%). We did not observe an increase in the alfalfa seed yield in fields pollinated with honey bees (HB, Apis mellifera L., 1758) or located near natural vegetation formations when compared to fields pollinated by the alfalfa leafcutting bee (ALCB, Megachile rotundata Fabricius, 1793). In this study, use of the specialized pollinator ALCB was two to four times more effective than HB in terms of seed yield. Therefore, ALCB can reduce the risks of GE contamination by increasing the alfalfa yield in Argentina, which may then lead to a decrease in imported seed containing the potential contaminants. In addition, due to its specificity and small radial action, the ALCB could also drastically limit unintentional transgene diffusion. The reduction of seed importation will decrease the risk of worse biological or transgenic introductions of contaminants into national agroecosystems. Therefore, the use of ALCB as an input becomes a priority until new management practices are developed and adopted.
Fil: Cantamutto, Miguel Angel. Universidad Nacional del Sur. Departamento de Agronomia; Argentina
Acta horticulturae, Oct 1, 2006
Acta horticulturae, Jun 1, 2011
Excessive hypocotyl growth observed in greenhouse-grown melon (Cucumis melo var. saccharinus Naud... more Excessive hypocotyl growth observed in greenhouse-grown melon (Cucumis melo var. saccharinus Naud.) seedlings makes post-planting establishment difficult. The objective of this work was to determine the effect of seedling's chemical or physical hardening on its re-establishment, growth, development and production after transplanting. Seedlings of melon were transplanted after being chemically or physically hardened at phenological stages "expanded cotyledon" (ECS) or "first true leaf" (FTLS). Chemical hardening was made by spraying Paclobutrazol (PBZ) at a concentration of 10 or 30 mg L-1. Mechanical hardening were performed by brushing the seedlings one minute once a day during 10 days at two intensities: 10 or 40 strokes min-1. Experiments and evaluations were made on field trials during three consecutive years. The two chemical treatments and the 10 strokes min-1 mechanical treatment at the ECS had the same effect of improving by 70% seedling establishment in comparison to the control. The 40 strokes min-1 mechanical treatment did not show any improvement in the transplant response. Growth and yield from mechanically hardened plants was similar to those from control plants, whereas chemically hardened seedlings sprayed with PBZ produced plants that had a good post-transplant growth and higher fruit yield (25%) compared with to the control. The results demonstrated that, in order to improve the quality of melon seedlings and their growth after transplanting, a low concentration of PBZ hardening procedure or a low intensity brushing at an early growth stage is recommended.
Helianthus petiolaris and H. annuus are exotic invaders that have spread widely in central Argent... more Helianthus petiolaris and H. annuus are exotic invaders that have spread widely in central Argentina in the last 70 years. As other annuals of the same genus, these species are outcrossers bearing a sporophytic self-incompatible mechanism. We investigated the ability to self-pollinate in plants of five accessions of each species, its influence on some reproductive traits, and compared to the cultivated sunflower, in which breeding for self-compatibility has been very successful. Plants were allowed to self-pollinate in bagged heads, manually forced to self-pollinate or allowed to cross-pollinate. Although both invasive species were confirmed as self-incompatible, some plants within most accessions were able to self-pollinate. There was no significant interaction between accessions and pollination type for most traits, except for seed set which was attributed to interspecific introgression. The self-compatibility of some plants was transmitted to their progeny. No significant correlation between self-pollination and spread distance from the proposed entry point for the exotic species was found. The occurrence of self-compatible plants was demonstrated in both species and this fact could in part explain the high invasive ability of annual Helianthus species in Argentina.
BAG. Journal of basic and applied genetics, Dec 1, 2014
Cereal Research Communications, 1998
In the semiarid Pampas of Argentina, durum wheat yields are highly dependent on rain distribution... more In the semiarid Pampas of Argentina, durum wheat yields are highly dependent on rain distribution and N availability, and consequently very variable. The aim of this study was to determine if simple phenotypic parameters, evaluated at the spike differentiation stage, which in term are influenced by prevailing environmental conditions, can be used to predict grain and protein yield, with a certain precision at an early enough stage of the crop cycle to allow interventive decisions. In order to assess the influence of the developmental stage of the main stem apex (APEX), the number of tillers per square meter (TILL) and the dry matter production (DMW), upon grain yield, thirteen trials were conducted in the Semiarid Pampas over two years, with two durum wheat cultivars (Buck Cristal and Buck Candisur), two fertilization treatments: unfertilized (YUNF) and 138 kg N ha-1 (YFER) at the end of tillering. Multiple linear regression analysis was performed. Kernel weight, protein content and protein production per unit area were also regressed with APEX, TELL and DMW. For each model variables were selected with the “forward” selection STEPWISE procedure in the BMDP New System computer program package. In the best model, APEX and TILL significantly predicted grain yield of unfertilized plots at the spike differentiation period (R2 = 0.596; p ≤ 0.01). These variables also correlated significantly with kernel weight and protein production, although these results must be considered as preliminary ones.
I n f l u e n c i a d e l Tamaño de l a Se m i l l a de T r ig o y s us Re s e r v a s P r o t e ... more I n f l u e n c i a d e l Tamaño de l a Se m i l l a de T r ig o y s us Re s e r v a s P r o t e i c a s e n : I-El V ig o r de Pl á n t u l a y su Me t o d o l o g í a de Ev a l u a c i ó n
Helianthus annuus y H. petiolaris son asteráceas anuales nativas de América del Norte que se han ... more Helianthus annuus y H. petiolaris son asteráceas anuales nativas de América del Norte que se han naturalizado en la región central de Argentina entre los 31° y 38° de latitud sur, en una gran diversidad de ambientes. Las poblaciones naturalizadas son predominantemente ruderales y ocupan bordes de caminos, canales y lotes cultivados. También existen poblaciones agrestales, que en el caso de H. annuus muestran introgresión con el girasol. Las dos especies naturalizadas tienen el mismo nivel de ploidía que el cultivo (2n=2x=34 cromosomas) aunque presentan diferencias estructurales, que imponen una barrera parcial a la hibridación. Morfológicamente son diferentes en altura, forma de hojas y tamaño de capítulos. Entre los caracteres taxonómicos, H. petiolaris se distingue por presentar pilosidad blanca en las páleas del centro del capítulo. También, las filarias de esta especie son lineales, mientras que las de H. annuus son abruptamente atenuadas. Presentan dormición, amplio período de floración-fructificación y desgrane explosivo, que favorece la dispersión de propágulos y persistencia. Las poblaciones agrestales de H. annuus se diferencian de los voluntarios de girasol porque forman poblaciones estables. Sus plantas presentan antocianinas, son ramificadas y tienen dehiscencia. En las parcelas invadidas se recomienda la rotación con cultivos diferentes al girasol y labranza mínima o cero para que la semilla sea eliminada por predación. Es crucial prevenir el establecimiento de poblaciones invasoras en regiones productoras de simiente de girasol, para evitar la contaminación de la semilla por flujo génico.Helianthus annuus and H. petiolaris are annual North American Asteraceae naturalized in the central region of Argentina, between 31° and 38° South Latitude, in a wide range of environments. Naturalized populations are predominantly ruderals established in roadsides, canals and cultivated fields. There are also agrestal populations, which in the case of H. annuus, show introgression with domesticated sunflower. The two naturalized species have the same ploidy level that the crop (2n = 2x = 34 chromosomes) but with structural differences that do not prevent interspecific hybridization. Both species are morphologically different in plant height, leaf shape and head size. Within taxonomic characters, H. petiolaris is distinguished from H. annuus because of the presence of white hairiness in the center pales of the disc. Also, H. petiolaris disc phyllaries are linear, while H. annuus phyllaries are abruptly attenuated. Plants have a large flowering-fructification period, seed shattering and dormancy, which favor seeds dispersal and soil seed bank persistence. Agrestal H. annuus differ from crop volunteers because of the former constitute stable populations. Agrestal plants have anthocyanins, are apically branched and their seeds shatter. In invaded fields, crop rotation and conservation tillage are strongly recommended. It is critical to prevent invasive populations establishment in sunflower seed production areas, to avoid seed contamination by gene flow.Fil: Presotto, Alejandro Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Casquero, Mauricio Javier. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. AgIdea; ArgentinaFil: Poverene, María Mónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Cantamutto, Miguel Ángel. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Hilario Ascasubi; Argentin
Fil: Pandolfo, Claudio Ezequiel. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Cent... more Fil: Pandolfo, Claudio Ezequiel. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Bahia Blanca. Centro de Recursos Naturales Renovables de la Zona Semiarida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiarida; Argentina. Universidad Nacional del Sur. Departamento de Agronomia; Argentina
Brassica rapa y B. napus son dos especies anuales de la familia de las Brassicaceae (Cruciferae),... more Brassica rapa y B. napus son dos especies anuales de la familia de las Brassicaceae (Cruciferae), cultivadas desde hace siglos como hortícolas u oleaginosas. En especial, B. napus (colza-canola) se destaca por su elevada participación en la producción mundial de aceites comestibles. Las formas silvestres o ferales de ambas especies son malezas en diversos ambientes agrícolas de clima templado. En Argentina, el nabo (B. rapa) es una importante invasora de cultivos de cereales, oleaginosas y hortícolas de la región pampeana. Esta especie está ampliamente distribuida en todo el país, encontrándose en las 23 provincias del territorio nacional. Las poblaciones ferales de B. napus son muy esporádicas y generalmente se desarrollan a la vera de caminos y bordes de lotes donde se ha cultivado colza-canola. El control de estas malezas se realiza con herbicidas de uso generalizado para el control de latifoliadas, como glifosato o herbicidas hormonales. Aunque en el país el cultivo de variedades de colza-canola transgénicas está prohibido, se han hallado poblaciones con el transgen que confiere resistencia a glifosato en las dos especies. La invasividad de los biotipos resistentes al glifosato en ambientes agrícolas se ve aumentada porque el carácter les confiere una clara ventaja en sistemas basados en el empleo intensivo del herbicida.Fil: Pandolfo, Claudio Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Presotto, Alejandro Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Cantamutto, Miguel Ángel. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Hilario Ascasubi; Argentin
BAG. Journal of basic and applied genetics, Dec 1, 2014
Helianthus petiolaris and H. annuus are exotic invaders that have spread widely in central Argent... more Helianthus petiolaris and H. annuus are exotic invaders that have spread widely in central Argentina in the last 70 years. As other annuals of the same genus, these species are outcrossers bearing a sporophytic self-incompatible mechanism. We investigated the ability to self-pollinate in plants of five accessions of each species, its influence on some reproductive traits, and compared to the cultivated sunflower, in which breeding for self-compatibility has been very successful. Plants were allowed to self-pollinate in bagged heads, manually forced to self-pollinate or allowed to cross-pollinate. Although both invasive species were confirmed as self-incompatible, some plants within most accessions were able to self-pollinate. There was no significant interaction between accessions and pollination type for most traits, except for seed set which was attributed to interspecific introgression. The self-compatibility of some plants was transmitted to their progeny. No significant correlation between self-pollination and spread distance from the proposed entry point for the exotic species was found. The occurrence of self-compatible plants was demonstrated in both species and this fact could in part explain the high invasive ability of annual Helianthus species in Argentina.
International journal of pest management, Aug 6, 2021
Journal of Arid Environments, Feb 1, 2023
Journal of Applied Entomology, Nov 24, 2021
Alfalfa (Medicago sativa L. 1753) is one of the main forage crops of the world, and the availabil... more Alfalfa (Medicago sativa L. 1753) is one of the main forage crops of the world, and the availability of an adequate seed supply to farmers is one of the main concerns for the seed industry. The international alfalfa seed trade is widespread and several countries depend on imported seed. The continued importation of alfalfa seed carries a serious risk of unintentional introductions, such as contamination by genetically engineered (GE) alfalfa. We evaluated: (i) GE contamination in the main alfalfa seed production area of Argentina by analysing 263 conventional bulk seed lots (~900 tonnes) and feral populations (n = 49) over a 5‐year period (2016–2021); and (ii) the location of alfalfa fields near natural vegetation formations as a pollination management strategy to increase the local seed production. Although GE alfalfa seed fields are prohibited, contamination was present in commercial seed lots (5.58% to 23.25%) and in feral alfalfa populations (8.16%). We did not observe an increase in the alfalfa seed yield in fields pollinated with honey bees (HB, Apis mellifera L., 1758) or located near natural vegetation formations when compared to fields pollinated by the alfalfa leafcutting bee (ALCB, Megachile rotundata Fabricius, 1793). In this study, use of the specialized pollinator ALCB was two to four times more effective than HB in terms of seed yield. Therefore, ALCB can reduce the risks of GE contamination by increasing the alfalfa yield in Argentina, which may then lead to a decrease in imported seed containing the potential contaminants. In addition, due to its specificity and small radial action, the ALCB could also drastically limit unintentional transgene diffusion. The reduction of seed importation will decrease the risk of worse biological or transgenic introductions of contaminants into national agroecosystems. Therefore, the use of ALCB as an input becomes a priority until new management practices are developed and adopted.
Fil: Cantamutto, Miguel Angel. Universidad Nacional del Sur. Departamento de Agronomia; Argentina
Acta horticulturae, Oct 1, 2006
Acta horticulturae, Jun 1, 2011
Excessive hypocotyl growth observed in greenhouse-grown melon (Cucumis melo var. saccharinus Naud... more Excessive hypocotyl growth observed in greenhouse-grown melon (Cucumis melo var. saccharinus Naud.) seedlings makes post-planting establishment difficult. The objective of this work was to determine the effect of seedling's chemical or physical hardening on its re-establishment, growth, development and production after transplanting. Seedlings of melon were transplanted after being chemically or physically hardened at phenological stages "expanded cotyledon" (ECS) or "first true leaf" (FTLS). Chemical hardening was made by spraying Paclobutrazol (PBZ) at a concentration of 10 or 30 mg L-1. Mechanical hardening were performed by brushing the seedlings one minute once a day during 10 days at two intensities: 10 or 40 strokes min-1. Experiments and evaluations were made on field trials during three consecutive years. The two chemical treatments and the 10 strokes min-1 mechanical treatment at the ECS had the same effect of improving by 70% seedling establishment in comparison to the control. The 40 strokes min-1 mechanical treatment did not show any improvement in the transplant response. Growth and yield from mechanically hardened plants was similar to those from control plants, whereas chemically hardened seedlings sprayed with PBZ produced plants that had a good post-transplant growth and higher fruit yield (25%) compared with to the control. The results demonstrated that, in order to improve the quality of melon seedlings and their growth after transplanting, a low concentration of PBZ hardening procedure or a low intensity brushing at an early growth stage is recommended.
Helianthus petiolaris and H. annuus are exotic invaders that have spread widely in central Argent... more Helianthus petiolaris and H. annuus are exotic invaders that have spread widely in central Argentina in the last 70 years. As other annuals of the same genus, these species are outcrossers bearing a sporophytic self-incompatible mechanism. We investigated the ability to self-pollinate in plants of five accessions of each species, its influence on some reproductive traits, and compared to the cultivated sunflower, in which breeding for self-compatibility has been very successful. Plants were allowed to self-pollinate in bagged heads, manually forced to self-pollinate or allowed to cross-pollinate. Although both invasive species were confirmed as self-incompatible, some plants within most accessions were able to self-pollinate. There was no significant interaction between accessions and pollination type for most traits, except for seed set which was attributed to interspecific introgression. The self-compatibility of some plants was transmitted to their progeny. No significant correlation between self-pollination and spread distance from the proposed entry point for the exotic species was found. The occurrence of self-compatible plants was demonstrated in both species and this fact could in part explain the high invasive ability of annual Helianthus species in Argentina.
BAG. Journal of basic and applied genetics, Dec 1, 2014
Cereal Research Communications, 1998
In the semiarid Pampas of Argentina, durum wheat yields are highly dependent on rain distribution... more In the semiarid Pampas of Argentina, durum wheat yields are highly dependent on rain distribution and N availability, and consequently very variable. The aim of this study was to determine if simple phenotypic parameters, evaluated at the spike differentiation stage, which in term are influenced by prevailing environmental conditions, can be used to predict grain and protein yield, with a certain precision at an early enough stage of the crop cycle to allow interventive decisions. In order to assess the influence of the developmental stage of the main stem apex (APEX), the number of tillers per square meter (TILL) and the dry matter production (DMW), upon grain yield, thirteen trials were conducted in the Semiarid Pampas over two years, with two durum wheat cultivars (Buck Cristal and Buck Candisur), two fertilization treatments: unfertilized (YUNF) and 138 kg N ha-1 (YFER) at the end of tillering. Multiple linear regression analysis was performed. Kernel weight, protein content and protein production per unit area were also regressed with APEX, TELL and DMW. For each model variables were selected with the “forward” selection STEPWISE procedure in the BMDP New System computer program package. In the best model, APEX and TILL significantly predicted grain yield of unfertilized plots at the spike differentiation period (R2 = 0.596; p ≤ 0.01). These variables also correlated significantly with kernel weight and protein production, although these results must be considered as preliminary ones.
I n f l u e n c i a d e l Tamaño de l a Se m i l l a de T r ig o y s us Re s e r v a s P r o t e ... more I n f l u e n c i a d e l Tamaño de l a Se m i l l a de T r ig o y s us Re s e r v a s P r o t e i c a s e n : I-El V ig o r de Pl á n t u l a y su Me t o d o l o g í a de Ev a l u a c i ó n
Helianthus annuus y H. petiolaris son asteráceas anuales nativas de América del Norte que se han ... more Helianthus annuus y H. petiolaris son asteráceas anuales nativas de América del Norte que se han naturalizado en la región central de Argentina entre los 31° y 38° de latitud sur, en una gran diversidad de ambientes. Las poblaciones naturalizadas son predominantemente ruderales y ocupan bordes de caminos, canales y lotes cultivados. También existen poblaciones agrestales, que en el caso de H. annuus muestran introgresión con el girasol. Las dos especies naturalizadas tienen el mismo nivel de ploidía que el cultivo (2n=2x=34 cromosomas) aunque presentan diferencias estructurales, que imponen una barrera parcial a la hibridación. Morfológicamente son diferentes en altura, forma de hojas y tamaño de capítulos. Entre los caracteres taxonómicos, H. petiolaris se distingue por presentar pilosidad blanca en las páleas del centro del capítulo. También, las filarias de esta especie son lineales, mientras que las de H. annuus son abruptamente atenuadas. Presentan dormición, amplio período de floración-fructificación y desgrane explosivo, que favorece la dispersión de propágulos y persistencia. Las poblaciones agrestales de H. annuus se diferencian de los voluntarios de girasol porque forman poblaciones estables. Sus plantas presentan antocianinas, son ramificadas y tienen dehiscencia. En las parcelas invadidas se recomienda la rotación con cultivos diferentes al girasol y labranza mínima o cero para que la semilla sea eliminada por predación. Es crucial prevenir el establecimiento de poblaciones invasoras en regiones productoras de simiente de girasol, para evitar la contaminación de la semilla por flujo génico.Helianthus annuus and H. petiolaris are annual North American Asteraceae naturalized in the central region of Argentina, between 31° and 38° South Latitude, in a wide range of environments. Naturalized populations are predominantly ruderals established in roadsides, canals and cultivated fields. There are also agrestal populations, which in the case of H. annuus, show introgression with domesticated sunflower. The two naturalized species have the same ploidy level that the crop (2n = 2x = 34 chromosomes) but with structural differences that do not prevent interspecific hybridization. Both species are morphologically different in plant height, leaf shape and head size. Within taxonomic characters, H. petiolaris is distinguished from H. annuus because of the presence of white hairiness in the center pales of the disc. Also, H. petiolaris disc phyllaries are linear, while H. annuus phyllaries are abruptly attenuated. Plants have a large flowering-fructification period, seed shattering and dormancy, which favor seeds dispersal and soil seed bank persistence. Agrestal H. annuus differ from crop volunteers because of the former constitute stable populations. Agrestal plants have anthocyanins, are apically branched and their seeds shatter. In invaded fields, crop rotation and conservation tillage are strongly recommended. It is critical to prevent invasive populations establishment in sunflower seed production areas, to avoid seed contamination by gene flow.Fil: Presotto, Alejandro Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Casquero, Mauricio Javier. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. AgIdea; ArgentinaFil: Poverene, María Mónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Cantamutto, Miguel Ángel. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Hilario Ascasubi; Argentin
Fil: Pandolfo, Claudio Ezequiel. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Cent... more Fil: Pandolfo, Claudio Ezequiel. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Bahia Blanca. Centro de Recursos Naturales Renovables de la Zona Semiarida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiarida; Argentina. Universidad Nacional del Sur. Departamento de Agronomia; Argentina
Brassica rapa y B. napus son dos especies anuales de la familia de las Brassicaceae (Cruciferae),... more Brassica rapa y B. napus son dos especies anuales de la familia de las Brassicaceae (Cruciferae), cultivadas desde hace siglos como hortícolas u oleaginosas. En especial, B. napus (colza-canola) se destaca por su elevada participación en la producción mundial de aceites comestibles. Las formas silvestres o ferales de ambas especies son malezas en diversos ambientes agrícolas de clima templado. En Argentina, el nabo (B. rapa) es una importante invasora de cultivos de cereales, oleaginosas y hortícolas de la región pampeana. Esta especie está ampliamente distribuida en todo el país, encontrándose en las 23 provincias del territorio nacional. Las poblaciones ferales de B. napus son muy esporádicas y generalmente se desarrollan a la vera de caminos y bordes de lotes donde se ha cultivado colza-canola. El control de estas malezas se realiza con herbicidas de uso generalizado para el control de latifoliadas, como glifosato o herbicidas hormonales. Aunque en el país el cultivo de variedades de colza-canola transgénicas está prohibido, se han hallado poblaciones con el transgen que confiere resistencia a glifosato en las dos especies. La invasividad de los biotipos resistentes al glifosato en ambientes agrícolas se ve aumentada porque el carácter les confiere una clara ventaja en sistemas basados en el empleo intensivo del herbicida.Fil: Pandolfo, Claudio Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Presotto, Alejandro Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina. Universidad Nacional del Sur. Departamento de Agronomía; ArgentinaFil: Cantamutto, Miguel Ángel. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Hilario Ascasubi; Argentin
BAG. Journal of basic and applied genetics, Dec 1, 2014
Helianthus petiolaris and H. annuus are exotic invaders that have spread widely in central Argent... more Helianthus petiolaris and H. annuus are exotic invaders that have spread widely in central Argentina in the last 70 years. As other annuals of the same genus, these species are outcrossers bearing a sporophytic self-incompatible mechanism. We investigated the ability to self-pollinate in plants of five accessions of each species, its influence on some reproductive traits, and compared to the cultivated sunflower, in which breeding for self-compatibility has been very successful. Plants were allowed to self-pollinate in bagged heads, manually forced to self-pollinate or allowed to cross-pollinate. Although both invasive species were confirmed as self-incompatible, some plants within most accessions were able to self-pollinate. There was no significant interaction between accessions and pollination type for most traits, except for seed set which was attributed to interspecific introgression. The self-compatibility of some plants was transmitted to their progeny. No significant correlation between self-pollination and spread distance from the proposed entry point for the exotic species was found. The occurrence of self-compatible plants was demonstrated in both species and this fact could in part explain the high invasive ability of annual Helianthus species in Argentina.
International journal of pest management, Aug 6, 2021