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Biblioteca (s) : |
INIA Treinta y Tres. |
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Fecha : |
21/02/2014 |
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Actualizado : |
11/10/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
PÉREZ DE VIDA, F.; LACA, E.A.; MACKILL, D.J.; FERNÁNDEZ, G.; FISCHER, A.J. |
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Afiliación : |
FERNANDO BLAS PEREZ DE VIDA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Relating rice traits to weed competitiveness an yield: a path analysis. |
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Fecha de publicación : |
2006 |
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Fuente / Imprenta : |
Weed Science, 2006, v.54, p. 1122-1131 |
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DOI : |
10.1614/WS-06-042R.1 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received March 6, 2006 // approved August 10, 2006. Published Dec. 2006.
DOI: https://doi.org/10.1614/WS-06-042R.1 |
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Contenido : |
Abstract:
Resistance to herbicides in the most important weeds threatens the sustainability of California rice. Weed-competitive rice cultivars could be a low-cost and safe nonchemical addition to an integrated weed management program. Trade-offs between competitiveness and productivity and inconsistent trait expression under weedy and weed-free conditions could complicate the breeding of competitive rice cultivars. A 2-year competition experiment was conducted in the greenhouse involving eight rice cultivars and two weed competition regimes (presence or absence of late watergrass) to examine the effects of rice weed-suppressive ability and tolerance to weed competition (weed tolerance) on rice yield. Competition reduced average rice yield from 32 to 48%, and watergrass biomass from 44 to 77%. Path analysis suggested that enhancing rice weed-suppressive ability and weed tolerance while minimizing possible productivity trade-offs should promote early (12 d after seeding) growth and light-capture traits followed by moderate growth rates before heading and a vigorous grain filling period. Crop growth rate (CGR) after heading was a relevant determinant of yield (direct path: 0.82, P < 0.01) and correlated (r = 0.30, P < 0.01) with weed tolerance. Late biomass accumulation was negatively correlated with harvest index and CGR during ripening (r = ?0.46, P < 0.01); thus, late-season competitiveness can lower productivity. Rice traits conferring competitiveness were correlated across weed competition regimes (r = 0.36–0.81, P < 0.01). However, significant cultivar-by-competition and cultivar-by-year interactions suggest that selection efficiency would be greater when traits are identified under competition and in different environments. This study relates to the phenotypic expression of traits for competitiveness. Breeding competitive cultivars will require additional knowledge on trait heritability, genetic correlations with competitiveness, and on the effects of the environment upon gene expression. MenosAbstract:
Resistance to herbicides in the most important weeds threatens the sustainability of California rice. Weed-competitive rice cultivars could be a low-cost and safe nonchemical addition to an integrated weed management program. Trade-offs between competitiveness and productivity and inconsistent trait expression under weedy and weed-free conditions could complicate the breeding of competitive rice cultivars. A 2-year competition experiment was conducted in the greenhouse involving eight rice cultivars and two weed competition regimes (presence or absence of late watergrass) to examine the effects of rice weed-suppressive ability and tolerance to weed competition (weed tolerance) on rice yield. Competition reduced average rice yield from 32 to 48%, and watergrass biomass from 44 to 77%. Path analysis suggested that enhancing rice weed-suppressive ability and weed tolerance while minimizing possible productivity trade-offs should promote early (12 d after seeding) growth and light-capture traits followed by moderate growth rates before heading and a vigorous grain filling period. Crop growth rate (CGR) after heading was a relevant determinant of yield (direct path: 0.82, P < 0.01) and correlated (r = 0.30, P < 0.01) with weed tolerance. Late biomass accumulation was negatively correlated with harvest index and CGR during ripening (r = ?0.46, P < 0.01); thus, late-season competitiveness can lower productivity. Rice traits conferring competitiveness were correlated acros... Presentar Todo |
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Thesagro : |
ARROZ; CULTIVOS; ECHINOCHLOA PHYLLOPOGON; ESCARDA; MALEZAS. |
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Asunto categoría : |
H60 Malezas y escardas |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/5240/1/Perez-arb-2006-1.pdf
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Marc : |
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024 7 $a10.1614/WS-06-042R.1$2DOI
100 1 $aPÉREZ DE VIDA, F.
245 $aRelating rice traits to weed competitiveness an yield$ba path analysis.
260 $c2006
500 $aArticle history: Received March 6, 2006 // approved August 10, 2006. Published Dec. 2006. DOI: https://doi.org/10.1614/WS-06-042R.1
520 $aAbstract: Resistance to herbicides in the most important weeds threatens the sustainability of California rice. Weed-competitive rice cultivars could be a low-cost and safe nonchemical addition to an integrated weed management program. Trade-offs between competitiveness and productivity and inconsistent trait expression under weedy and weed-free conditions could complicate the breeding of competitive rice cultivars. A 2-year competition experiment was conducted in the greenhouse involving eight rice cultivars and two weed competition regimes (presence or absence of late watergrass) to examine the effects of rice weed-suppressive ability and tolerance to weed competition (weed tolerance) on rice yield. Competition reduced average rice yield from 32 to 48%, and watergrass biomass from 44 to 77%. Path analysis suggested that enhancing rice weed-suppressive ability and weed tolerance while minimizing possible productivity trade-offs should promote early (12 d after seeding) growth and light-capture traits followed by moderate growth rates before heading and a vigorous grain filling period. Crop growth rate (CGR) after heading was a relevant determinant of yield (direct path: 0.82, P < 0.01) and correlated (r = 0.30, P < 0.01) with weed tolerance. Late biomass accumulation was negatively correlated with harvest index and CGR during ripening (r = ?0.46, P < 0.01); thus, late-season competitiveness can lower productivity. Rice traits conferring competitiveness were correlated across weed competition regimes (r = 0.36–0.81, P < 0.01). However, significant cultivar-by-competition and cultivar-by-year interactions suggest that selection efficiency would be greater when traits are identified under competition and in different environments. This study relates to the phenotypic expression of traits for competitiveness. Breeding competitive cultivars will require additional knowledge on trait heritability, genetic correlations with competitiveness, and on the effects of the environment upon gene expression.
650 $aARROZ
650 $aCULTIVOS
650 $aECHINOCHLOA PHYLLOPOGON
650 $aESCARDA
650 $aMALEZAS
700 1 $aLACA, E.A.
700 1 $aMACKILL, D.J.
700 1 $aFERNÁNDEZ, G.
700 1 $aFISCHER, A.J.
773 $tWeed Science, 2006$gv.54, p. 1122-1131
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Registro original : |
INIA Treinta y Tres (TT) |
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha actual : |
25/10/2016 |
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Actualizado : |
25/10/2016 |
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Tipo de producción científica : |
Trabajos en Congresos/Conferencias |
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Autor : |
CASTILLO, A.; VAIO, M.; LÓPEZ CARRO, B.; DALLA RIZZA, M.; REYNO, R. |
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Afiliación : |
ALICIA MARIA CASTILLO SALLE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; M. VAIO, Universidad de la República (UdelaR)/ Facultad de Agronomía; B. LÓPEZ CARRO, MEC/ IIBCE (Instituto de Investigaciones de Ciencias Biológicas "Clemente Estable"); MARCO DALLA RIZZA VILARO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; RAFAEL ALEJANDRO REYNO PODESTA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Estrategia de mejoramiento genético en tréboles de importancia económica para aumentar la persistencia y la tolerancia al estrés abiótico. |
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Complemento del título : |
MV 5 - COMUNICACIONES LIBRES - MV. MEJORAMIENTO VEGETAL |
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Fecha de publicación : |
2016 |
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Fuente / Imprenta : |
In: JOURNAL OF BASIC & APPLIED GENETICS, 2016, Vol.27, Iss. 1 (Supp.). XVI LATIN AMERICAN CONGRESS OF GENETICS, IV CONGRESS OF THE URUGUAYAN SOCIETY OF GENETICS, XLIX ANNUAL MEETING OF THE GENETICS SOCIETY OF CHILE, XLV ARGENTINE CONGRESS OF GENETICS, 9-12 October 2016. PROCEEDINGS. Montevideo (Uruguay): SAG, 2016. |
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Páginas : |
p. 283 |
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ISSN : |
1852-6233 |
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Idioma : |
Español |
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Palabras claves : |
TRIFOLIUM POLYMORPHUM. |
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Thesagro : |
FITOMEJORAMIENTO; LEGUMINOSA FORRAJERA; PASTURAS; TREBOL BLANCO. |
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Asunto categoría : |
-- |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/6217/1/Simposio-BAG-v.XXVIII-Suppl.1.p.283.pdf
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Marc : |
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008 2016 bl uuuu u0uu1 u #d
022 $a1852-6233
100 1 $aCASTILLO, A.
245 $aEstrategia de mejoramiento genético en tréboles de importancia económica para aumentar la persistencia y la tolerancia al estrés abiótico.$h[electronic resource]
260 $aIn: JOURNAL OF BASIC & APPLIED GENETICS, 2016, Vol.27, Iss. 1 (Supp.). XVI LATIN AMERICAN CONGRESS OF GENETICS, IV CONGRESS OF THE URUGUAYAN SOCIETY OF GENETICS, XLIX ANNUAL MEETING OF THE GENETICS SOCIETY OF CHILE, XLV ARGENTINE CONGRESS OF GENETICS, 9-12 October 2016. PROCEEDINGS. Montevideo (Uruguay): SAG$c2016
300 $ap. 283
650 $aFITOMEJORAMIENTO
650 $aLEGUMINOSA FORRAJERA
650 $aPASTURAS
650 $aTREBOL BLANCO
653 $aTRIFOLIUM POLYMORPHUM
700 1 $aVAIO, M.
700 1 $aLÓPEZ CARRO, B.
700 1 $aDALLA RIZZA, M.
700 1 $aREYNO, R.
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INIA Las Brujas (LB) |
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