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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha : |
21/02/2014 |
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Actualizado : |
06/07/2021 |
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Tipo de producción científica : |
Abstracts/Resúmenes |
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Autor : |
REBUFFO, M.; CONSORTIUM LOTASSA; CONSORTIUM LESIS. |
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Afiliación : |
MONICA IRENE REBUFFO GFELLER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Breeding temperate legumes: advances and challenges. |
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Fecha de publicación : |
2007 |
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Fuente / Imprenta : |
Lotus Newsletter, 2007, Volume 37, Issue 3, pages 105. |
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ISSN : |
1510-7809 |
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Idioma : |
Inglés |
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Contenido : |
Abstract: Conventional breeding is an efficient tool with factors with low environmental effect, where the phenotype expression is closer to the genotype. On the other hand, selection for abiotic stresses involves complex characteristics restricting progress of conventional breeding
programs. The study of the responses of several perennial legumes to selection for water and saline stress, Al tolerance and P availability is developed in the frame of the Projects LOTASSA (FP6-2003-INCO-DEV2 PL-517617) and LESIS (FTG-787/2005). Their
approach involves the characterization and selection of naturalized populations for the identification of superior germplasm, as well as their metabolic and molecular analysis in order to develop strategies that could spead conventional breeding in the future. The
presentation describes the approach and first results. The physiological responses of the main cultivated species to Al, saline and water stress are evaluated. Divergent selection is carried out in Lotus corniculatus (Lc) and diploid L. uliginosus (=L. pedunculatus) (Lu) for
tolerance to water stress and Al tolerance, and the development of contrasting populations for root characteristics (root branching and density), the characterization of natural populations of L. glaber (=L. tenuis), Trifolium repens (Tr) and T. pratense (Tp) for water stress, L. glaber for saline stress. Chilean and Uruguayan naturalized populations of Lc, Tr and Tp are evaluated for water stress and prevailing diseases. Results show that there is genetic variability within the Lc, Lu and Lg germplasm for Al tolerance, water and saline stress, respectively, to be used in the selection process. Lc ultivar San Gabriel (Uruguay) was more sensitive to Al toxicity than Brasilian germplasm; the membrane potential in root cortex cells remains unchanged between pH 4.4 and 6 for the most tolerant Brasilian selections. Although saline stress stunted foliar and root growth, the evaluation at young stages (40 days) showed Lg entries collected in saline soils of Buenos Aires Province (Argentine) that produced 50% more forage than less adapted germplasm. There are differential responses of Chilean Lg accessions to water stress in leaf rate appearance, stem elongation and stem dry weight. Water stress (40% field capacity) was imposed for six months to Lc cultivar San Gabriel and INIA Draco. Contrasting phenotypes were identified through regrowth production (2.15 and 4.13 g/plant of fresh weight for sensitive and tolerant selections, respectively). Differences between sensitive and tolerant selections were larger for Lu (2.96 and 7.72 g FW/plant). Proline is one of the metabolite that shows high consistency with the response to water stress in several species of Lotus as well as in Tp. The
isotopic discrimination (?13C/12C) has a good correlation with water use efficiency for the cultivated Lotus species. MenosAbstract: Conventional breeding is an efficient tool with factors with low environmental effect, where the phenotype expression is closer to the genotype. On the other hand, selection for abiotic stresses involves complex characteristics restricting progress of conventional breeding
programs. The study of the responses of several perennial legumes to selection for water and saline stress, Al tolerance and P availability is developed in the frame of the Projects LOTASSA (FP6-2003-INCO-DEV2 PL-517617) and LESIS (FTG-787/2005). Their
approach involves the characterization and selection of naturalized populations for the identification of superior germplasm, as well as their metabolic and molecular analysis in order to develop strategies that could spead conventional breeding in the future. The
presentation describes the approach and first results. The physiological responses of the main cultivated species to Al, saline and water stress are evaluated. Divergent selection is carried out in Lotus corniculatus (Lc) and diploid L. uliginosus (=L. pedunculatus) (Lu) for
tolerance to water stress and Al tolerance, and the development of contrasting populations for root characteristics (root branching and density), the characterization of natural populations of L. glaber (=L. tenuis), Trifolium repens (Tr) and T. pratense (Tp) for water stress, L. glaber for saline stress. Chilean and Uruguayan naturalized populations of Lc, Tr and Tp are evaluated for water stress and prevailing d... Presentar Todo |
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Thesagro : |
LEGUMINOSA FORRAJERA; MEJORAMIENTO DE PASTURAS. |
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Asunto categoría : |
F01 Cultivo |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/15795/1/Lotus-Newsletter-2007-Volume-37-3-105.pdf
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Marc : |
LEADER 03413nam a2200169 a 4500
001 1034453
005 2021-07-06
008 2007 bl uuuu u01u1 u #d
022 $a1510-7809
100 1 $aREBUFFO, M.
245 $aBreeding temperate legumes$badvances and challenges.$h[electronic resource]
260 $aLotus Newsletter, 2007, Volume 37, Issue 3, pages 105.$c2007
520 $aAbstract: Conventional breeding is an efficient tool with factors with low environmental effect, where the phenotype expression is closer to the genotype. On the other hand, selection for abiotic stresses involves complex characteristics restricting progress of conventional breeding programs. The study of the responses of several perennial legumes to selection for water and saline stress, Al tolerance and P availability is developed in the frame of the Projects LOTASSA (FP6-2003-INCO-DEV2 PL-517617) and LESIS (FTG-787/2005). Their approach involves the characterization and selection of naturalized populations for the identification of superior germplasm, as well as their metabolic and molecular analysis in order to develop strategies that could spead conventional breeding in the future. The presentation describes the approach and first results. The physiological responses of the main cultivated species to Al, saline and water stress are evaluated. Divergent selection is carried out in Lotus corniculatus (Lc) and diploid L. uliginosus (=L. pedunculatus) (Lu) for tolerance to water stress and Al tolerance, and the development of contrasting populations for root characteristics (root branching and density), the characterization of natural populations of L. glaber (=L. tenuis), Trifolium repens (Tr) and T. pratense (Tp) for water stress, L. glaber for saline stress. Chilean and Uruguayan naturalized populations of Lc, Tr and Tp are evaluated for water stress and prevailing diseases. Results show that there is genetic variability within the Lc, Lu and Lg germplasm for Al tolerance, water and saline stress, respectively, to be used in the selection process. Lc ultivar San Gabriel (Uruguay) was more sensitive to Al toxicity than Brasilian germplasm; the membrane potential in root cortex cells remains unchanged between pH 4.4 and 6 for the most tolerant Brasilian selections. Although saline stress stunted foliar and root growth, the evaluation at young stages (40 days) showed Lg entries collected in saline soils of Buenos Aires Province (Argentine) that produced 50% more forage than less adapted germplasm. There are differential responses of Chilean Lg accessions to water stress in leaf rate appearance, stem elongation and stem dry weight. Water stress (40% field capacity) was imposed for six months to Lc cultivar San Gabriel and INIA Draco. Contrasting phenotypes were identified through regrowth production (2.15 and 4.13 g/plant of fresh weight for sensitive and tolerant selections, respectively). Differences between sensitive and tolerant selections were larger for Lu (2.96 and 7.72 g FW/plant). Proline is one of the metabolite that shows high consistency with the response to water stress in several species of Lotus as well as in Tp. The isotopic discrimination (?13C/12C) has a good correlation with water use efficiency for the cultivated Lotus species.
650 $aLEGUMINOSA FORRAJERA
650 $aMEJORAMIENTO DE PASTURAS
700 1 $aCONSORTIUM LOTASSA
700 1 $aCONSORTIUM LESIS.
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Registro original : |
INIA La Estanzuela (LE) |
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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó; INIA Treinta y Tres. |
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Fecha actual : |
22/11/2019 |
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Actualizado : |
28/11/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
MARCHESI, C.; SALDAIN, N.E. |
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Afiliación : |
CLAUDIA ELIZABETH MARCHESI GYERMAN, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; NÉSTOR ELIO SALDAIN CROCCE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
First report of herbicide-resistant Echinochloa crus-galli in Uruguayan rice fields. |
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Fecha de publicación : |
2019 |
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Fuente / Imprenta : |
Agronomy, v. 9, no.12, p. 790, 2019. OPEN ACCESS. |
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DOI : |
10.3390/agronomy9120790 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received: 19 October 2019; Accepted: 20 November 2019; Published: 22 November 2019. |
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Contenido : |
Abstract: Echinochloa crus-galli is the main weed in direct dry-seeded rice systems worldwide and is the target of most herbicide applications. Numerous cases of E. crus-galli biotypes with resistance to herbicides have been reported in dierent regions of the world; however, to date, no cases have been reported in Uruguay. The purpose of this research is to assess the presence of herbicide-resistant E. crus-galli in the rice fields of Uruguay. More than 40 E. crus-galli biotypes were sampled from eastern to northern regions in dierent years and assessed following the Herbicide Resistance Action Committee (HRAC) protocols of confirmation, using the herbicides propanil, quinclorac, clomazone, bispyribac?sodium, penoxsulam, imazapyr + imazapic, profoxidim and cyhalofop. Herbicides rates included 0, 0.125, 0.25, 0.50, 1, 2, 4 and 8 times the label rate. Most E. crus-galli biotypes (35) resulted as resistant to quinclorac. Furthermore, resistance was confirmed to propanil in at least seven biotypes, 12 to imazapyr + imazapic, and three to penoxsulam. Five biotypes showed multiple resistance to propanil and quinclorac, and one biotype was resistant to quinclorac, penoxsulam and imazapyr + imazapic. No biotype showed confirmed resistance to clomazone, bispyribac-sodium, cyhalofop or profoxidim?herbicides that ensure satisfactory control. The presence of E. crus-galli herbicide resistant-biotypes reduces herbicide options, threatening rice production in Uruguay. In this context, a redesign of the productive systems would represent an opportunity to complement the chemical control, integrating larger-scale cultural and management practices. MenosAbstract: Echinochloa crus-galli is the main weed in direct dry-seeded rice systems worldwide and is the target of most herbicide applications. Numerous cases of E. crus-galli biotypes with resistance to herbicides have been reported in dierent regions of the world; however, to date, no cases have been reported in Uruguay. The purpose of this research is to assess the presence of herbicide-resistant E. crus-galli in the rice fields of Uruguay. More than 40 E. crus-galli biotypes were sampled from eastern to northern regions in dierent years and assessed following the Herbicide Resistance Action Committee (HRAC) protocols of confirmation, using the herbicides propanil, quinclorac, clomazone, bispyribac?sodium, penoxsulam, imazapyr + imazapic, profoxidim and cyhalofop. Herbicides rates included 0, 0.125, 0.25, 0.50, 1, 2, 4 and 8 times the label rate. Most E. crus-galli biotypes (35) resulted as resistant to quinclorac. Furthermore, resistance was confirmed to propanil in at least seven biotypes, 12 to imazapyr + imazapic, and three to penoxsulam. Five biotypes showed multiple resistance to propanil and quinclorac, and one biotype was resistant to quinclorac, penoxsulam and imazapyr + imazapic. No biotype showed confirmed resistance to clomazone, bispyribac-sodium, cyhalofop or profoxidim?herbicides that ensure satisfactory control. The presence of E. crus-galli herbicide resistant-biotypes reduces herbicide options, threatening rice production in Uruguay. In this context, a r... Presentar Todo |
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Palabras claves : |
BARNYARDGRASS; IMAZAPIR + IMAZAPIC; PENOXSULAM; PROPANIL; QUINCLORAC; RICE (ORYZA SATIVA L.). |
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Asunto categoría : |
F01 Cultivo |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/13815/1/Marchesi-2019.pdf
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Marc : |
LEADER 02414naa a2200229 a 4500
001 1060442
005 2019-11-28
008 2019 bl uuuu u00u1 u #d
024 7 $a10.3390/agronomy9120790$2DOI
100 1 $aMARCHESI, C.
245 $aFirst report of herbicide-resistant Echinochloa crus-galli in Uruguayan rice fields.$h[electronic resource]
260 $c2019
500 $aArticle history: Received: 19 October 2019; Accepted: 20 November 2019; Published: 22 November 2019.
520 $aAbstract: Echinochloa crus-galli is the main weed in direct dry-seeded rice systems worldwide and is the target of most herbicide applications. Numerous cases of E. crus-galli biotypes with resistance to herbicides have been reported in dierent regions of the world; however, to date, no cases have been reported in Uruguay. The purpose of this research is to assess the presence of herbicide-resistant E. crus-galli in the rice fields of Uruguay. More than 40 E. crus-galli biotypes were sampled from eastern to northern regions in dierent years and assessed following the Herbicide Resistance Action Committee (HRAC) protocols of confirmation, using the herbicides propanil, quinclorac, clomazone, bispyribac?sodium, penoxsulam, imazapyr + imazapic, profoxidim and cyhalofop. Herbicides rates included 0, 0.125, 0.25, 0.50, 1, 2, 4 and 8 times the label rate. Most E. crus-galli biotypes (35) resulted as resistant to quinclorac. Furthermore, resistance was confirmed to propanil in at least seven biotypes, 12 to imazapyr + imazapic, and three to penoxsulam. Five biotypes showed multiple resistance to propanil and quinclorac, and one biotype was resistant to quinclorac, penoxsulam and imazapyr + imazapic. No biotype showed confirmed resistance to clomazone, bispyribac-sodium, cyhalofop or profoxidim?herbicides that ensure satisfactory control. The presence of E. crus-galli herbicide resistant-biotypes reduces herbicide options, threatening rice production in Uruguay. In this context, a redesign of the productive systems would represent an opportunity to complement the chemical control, integrating larger-scale cultural and management practices.
653 $aBARNYARDGRASS
653 $aIMAZAPIR + IMAZAPIC
653 $aPENOXSULAM
653 $aPROPANIL
653 $aQUINCLORAC
653 $aRICE (ORYZA SATIVA L.)
700 1 $aSALDAIN, N.E.
773 $tAgronomy$gv. 9, no.12, p. 790, 2019. OPEN ACCESS.
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