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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
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Fecha : |
16/04/2019 |
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Actualizado : |
16/04/2019 |
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Tipo de producción científica : |
Abstracts/Resúmenes |
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Autor : |
DO CANTO, J.; REYNO, R.; GUTIERREZ, F.; CIBILS-STEWART, X.; STEWART, A. |
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Afiliación : |
JAVIER DO CANTO FAGUNDEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; RAFAEL ALEJANDRO REYNO PODESTA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FELIX ALBERTO GUTIERREZ ZAMIT, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; XIMENA CIBILS-STEWART, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ALAN STEWART, PGG Wrightson Seeds, New Zealand. |
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Título : |
Does endophyte-association improve productivity in tall fescue? The case of the novel AR584 strain in a non-limiting environment. [Resumen]. |
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Fecha de publicación : |
2019 |
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Fuente / Imprenta : |
In: International Forage & Turf Breeding Conference, 24-27 March, Lake Buena Vista, FL, 2019. |
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Idioma : |
Inglés |
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Contenido : |
In the symbiotic relationship between tall fescue (Festuca arundinacea SHREB.) and the endophytic fungus Epichloë coenophialum, the compounds produced by the later offers survival benefits to the infected grass. Novel endophyte strains offer such advantages, with no toxicity associated to cattle. However, whether both the biotic and abiotic stress tolerance attributed to the endophyte infection result in an increase in dry matter productivity remains unclear. Thus, the objective of this study was to determine if tall fescues infected with the novel endophyte strain AR584 performed better than its endophyte-free counterpart in the temperate region of Uruguay. From 2010 to 2017 two cultivars, INIA Aurora and INIA Fortuna, with and without the AR584 endophyte (E+ and Nil respectively) were sowed in the tall fescue field trials of INIA?s breeding program. These cultivars along with other breeding lines were sowed in 6.25 m2 plots, with 4 reps in randomized complete block design, and were evaluated for 3 years periods. Both, seasonal and annual dry matter (DM) production of the swards were evaluated under cuts. Analysis of the data shows that Cultivar INIA Aurora E+ had higher annual DM yields than INIA Aurora Nil in swards of all 1st, 2nd and 3rd years, but differences were not significant (P>0.05). The seasonal DM yields were also higher in INIA Aurora E+ in all but one season, although the difference was significant only in spring of the 1st year (P<0.05). On the other hand, cultivar INIA Fortuna E+, had higher annual DM yields in swards of 1st and 2nd years and lower yield in 3rd year than INIA Fortuna Nil but differences were never significant (P>0.05). Except for the 3rd winter and spring, seasonal DM yields were higher for INIA Fortuna E+, but again the differences were not significant (P>0.05). For the total DM production over 3 years of evaluation, INIA Aurora E+ produced 4.9% and INIA Fortuna E+ produced 1.4% more than their respective Nil versions. Levels of infection measured by blotting test averaged 91±5.5 for INIA Aurora E+, 3±2.2 for INIA Aurora Nil, 93±3 in INIA Fortuna E+, and 25±7.9 in INIA Fortuna Nil. Although data can be further analyzed, these preliminary analysis suggests that the novel endophyte AR584 provides a small, but not significant advantage, in DM production to, infected tall fescue cultivars in mild environments. MenosIn the symbiotic relationship between tall fescue (Festuca arundinacea SHREB.) and the endophytic fungus Epichloë coenophialum, the compounds produced by the later offers survival benefits to the infected grass. Novel endophyte strains offer such advantages, with no toxicity associated to cattle. However, whether both the biotic and abiotic stress tolerance attributed to the endophyte infection result in an increase in dry matter productivity remains unclear. Thus, the objective of this study was to determine if tall fescues infected with the novel endophyte strain AR584 performed better than its endophyte-free counterpart in the temperate region of Uruguay. From 2010 to 2017 two cultivars, INIA Aurora and INIA Fortuna, with and without the AR584 endophyte (E+ and Nil respectively) were sowed in the tall fescue field trials of INIA?s breeding program. These cultivars along with other breeding lines were sowed in 6.25 m2 plots, with 4 reps in randomized complete block design, and were evaluated for 3 years periods. Both, seasonal and annual dry matter (DM) production of the swards were evaluated under cuts. Analysis of the data shows that Cultivar INIA Aurora E+ had higher annual DM yields than INIA Aurora Nil in swards of all 1st, 2nd and 3rd years, but differences were not significant (P>0.05). The seasonal DM yields were also higher in INIA Aurora E+ in all but one season, although the difference was significant only in spring of the 1st year (P<0.05). On the other hand, c... Presentar Todo |
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Palabras claves : |
FESCUE; FESTUCA ARUNDINACEA; PASTURA; PASTURE. |
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Asunto categoría : |
A50 Investigación agraria |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/12633/1/DoCanto2019.resumen.pdf
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Marc : |
LEADER 03072nam a2200205 a 4500
001 1059729
005 2019-04-16
008 2019 bl uuuu u00u1 u #d
100 1 $aDO CANTO, J.
245 $aDoes endophyte-association improve productivity in tall fescue? The case of the novel AR584 strain in a non-limiting environment. [Resumen].$h[electronic resource]
260 $aIn: International Forage & Turf Breeding Conference, 24-27 March, Lake Buena Vista, FL$c2019
520 $aIn the symbiotic relationship between tall fescue (Festuca arundinacea SHREB.) and the endophytic fungus Epichloë coenophialum, the compounds produced by the later offers survival benefits to the infected grass. Novel endophyte strains offer such advantages, with no toxicity associated to cattle. However, whether both the biotic and abiotic stress tolerance attributed to the endophyte infection result in an increase in dry matter productivity remains unclear. Thus, the objective of this study was to determine if tall fescues infected with the novel endophyte strain AR584 performed better than its endophyte-free counterpart in the temperate region of Uruguay. From 2010 to 2017 two cultivars, INIA Aurora and INIA Fortuna, with and without the AR584 endophyte (E+ and Nil respectively) were sowed in the tall fescue field trials of INIA?s breeding program. These cultivars along with other breeding lines were sowed in 6.25 m2 plots, with 4 reps in randomized complete block design, and were evaluated for 3 years periods. Both, seasonal and annual dry matter (DM) production of the swards were evaluated under cuts. Analysis of the data shows that Cultivar INIA Aurora E+ had higher annual DM yields than INIA Aurora Nil in swards of all 1st, 2nd and 3rd years, but differences were not significant (P>0.05). The seasonal DM yields were also higher in INIA Aurora E+ in all but one season, although the difference was significant only in spring of the 1st year (P<0.05). On the other hand, cultivar INIA Fortuna E+, had higher annual DM yields in swards of 1st and 2nd years and lower yield in 3rd year than INIA Fortuna Nil but differences were never significant (P>0.05). Except for the 3rd winter and spring, seasonal DM yields were higher for INIA Fortuna E+, but again the differences were not significant (P>0.05). For the total DM production over 3 years of evaluation, INIA Aurora E+ produced 4.9% and INIA Fortuna E+ produced 1.4% more than their respective Nil versions. Levels of infection measured by blotting test averaged 91±5.5 for INIA Aurora E+, 3±2.2 for INIA Aurora Nil, 93±3 in INIA Fortuna E+, and 25±7.9 in INIA Fortuna Nil. Although data can be further analyzed, these preliminary analysis suggests that the novel endophyte AR584 provides a small, but not significant advantage, in DM production to, infected tall fescue cultivars in mild environments.
653 $aFESCUE
653 $aFESTUCA ARUNDINACEA
653 $aPASTURA
653 $aPASTURE
700 1 $aREYNO, R.
700 1 $aGUTIERREZ, F.
700 1 $aCIBILS-STEWART, X.
700 1 $aSTEWART, A.
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Registro original : |
INIA Tacuarembó (TBO) |
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 | Acceso al texto completo restringido a Biblioteca INIA Las Brujas. Por información adicional contacte bibliolb@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha actual : |
31/07/2017 |
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Actualizado : |
18/10/2017 |
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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 : |
JÁUREGUI, J. M.; MICHELINI, D. F.; AGNUSDEI, M. G.; BAUDRACCO, J.; SEVILLA, J. H.; CHILIBROSTE, P.; LATTANZI, F. |
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Afiliación : |
J. M. JÁUREGUI, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina; Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Esperanza (SF), Argentina; D. F. MICHELINI, Universidad de la República, Centro Universitario Región Litoral Norte, Salto, Uruguay; MÓNICA GRACIELA AGNUSDEI, Instituto Nacional de Tecnologia Agropecuaria Buenos Aires, Estación Experimental Agropecuaria Balcarce, Buenos Aires, Argentina; JAVIER BAUDRACCO, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina; Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Esperanza (SF), Argentina; J. H. SEVILLA, Instituto Nacional de Tecnología Agropecuaria, Concepción del Uruguay, Argentina; PABLO CHILIBROSTE, Universidad de la República, Estación Experimental Dr. Mario A. Cassinoni, Paysandú, Uruguay; FERNANDO A. LATTANZI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Persistence of tall fescue in a subtropical environment: tiller survival over summer in response to flowering control and nitrogen supply. |
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Fecha de publicación : |
2017 |
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Fuente / Imprenta : |
Grass and Forage Science, 72(3):454-466, 2017. |
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DOI : |
10.1111/gfs.12252 |
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Idioma : |
Inglés |
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Notas : |
Article history: Version of record online: 5 September 2016 // Manuscript Revised: 25 July 2016 // Manuscript Received: 12 January 2016 |
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Contenido : |
ABSTRACT.
Enhancing pasture persistence is crucial to achieve more sustainable grass-based animal production systems. Although it is known that persistence of perennial ryegrass is based on a high turnover of tillers during late spring and summer, little is known about other forage species, particularly in subtropical climates. To address this question, this study evaluated survival of grazed tall fescue tillers growing in a subtropical climate. We hypothesized that hard tactical grazing during winter to remove reproductive stems (designated as 'flowering control'), and nitrogen fertilization in spring, would both improve tiller survival over summer, and thus enhance tiller density. This was assessed in two experiments. In both experiments, few tillers appeared during late spring and summer and so tiller density depended on the dynamics of vegetative tillers present in the sward in spring. In Experiment 2, flowering control and nitrogen fertilization both enhanced the survival of that critical tiller cohort, but the effects were not additive. Responses were similar but not statistically significant in Experiment 1, which had a warmer, drier summer and lower overall survival rates. Unlike grasses in temperate environments, persistence of tall fescue in this subtropical site appeared to follow a 'vegetative pathway'; i.e., new tillers were produced largely in autumn, from vegetative tillers that survived the summer.
© 2016 John Wiley & Sons Ltd. |
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Palabras claves : |
GRAZING INTENSITY; NITROGEN FERTILIZATION; PERSISTENCE; TALL FESCUE; TILLER TURNOVER. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 02444naa a2200277 a 4500
001 1057426
005 2017-10-18
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1111/gfs.12252$2DOI
100 1 $aJÁUREGUI, J. M.
245 $aPersistence of tall fescue in a subtropical environment$btiller survival over summer in response to flowering control and nitrogen supply.$h[electronic resource]
260 $c2017
500 $aArticle history: Version of record online: 5 September 2016 // Manuscript Revised: 25 July 2016 // Manuscript Received: 12 January 2016
520 $aABSTRACT. Enhancing pasture persistence is crucial to achieve more sustainable grass-based animal production systems. Although it is known that persistence of perennial ryegrass is based on a high turnover of tillers during late spring and summer, little is known about other forage species, particularly in subtropical climates. To address this question, this study evaluated survival of grazed tall fescue tillers growing in a subtropical climate. We hypothesized that hard tactical grazing during winter to remove reproductive stems (designated as 'flowering control'), and nitrogen fertilization in spring, would both improve tiller survival over summer, and thus enhance tiller density. This was assessed in two experiments. In both experiments, few tillers appeared during late spring and summer and so tiller density depended on the dynamics of vegetative tillers present in the sward in spring. In Experiment 2, flowering control and nitrogen fertilization both enhanced the survival of that critical tiller cohort, but the effects were not additive. Responses were similar but not statistically significant in Experiment 1, which had a warmer, drier summer and lower overall survival rates. Unlike grasses in temperate environments, persistence of tall fescue in this subtropical site appeared to follow a 'vegetative pathway'; i.e., new tillers were produced largely in autumn, from vegetative tillers that survived the summer. © 2016 John Wiley & Sons Ltd.
653 $aGRAZING INTENSITY
653 $aNITROGEN FERTILIZATION
653 $aPERSISTENCE
653 $aTALL FESCUE
653 $aTILLER TURNOVER
700 1 $aMICHELINI, D. F.
700 1 $aAGNUSDEI, M. G.
700 1 $aBAUDRACCO, J.
700 1 $aSEVILLA, J. H.
700 1 $aCHILIBROSTE, P.
700 1 $aLATTANZI, F.
773 $tGrass and Forage Science, 72(3):454-466, 2017.
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