| |
|
|
|
Registro completo
|
|
Biblioteca (s) : |
INIA Treinta y Tres. |
|
Fecha : |
21/02/2014 |
|
Actualizado : |
11/10/2019 |
|
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
|
Autor : |
PÉREZ DE VIDA, F.; LACA, E.A.; MACKILL, D.J.; FERNÁNDEZ, G.; FISCHER, A.J. |
|
Afiliación : |
FERNANDO BLAS PEREZ DE VIDA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
|
Título : |
Relating rice traits to weed competitiveness an yield: a path analysis. |
|
Fecha de publicación : |
2006 |
|
Fuente / Imprenta : |
Weed Science, 2006, v.54, p. 1122-1131 |
|
DOI : |
10.1614/WS-06-042R.1 |
|
Idioma : |
Inglés |
|
Notas : |
Article history: Received March 6, 2006 // approved August 10, 2006. Published Dec. 2006.
DOI: https://doi.org/10.1614/WS-06-042R.1 |
|
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 |
|
Thesagro : |
ARROZ; CULTIVOS; ECHINOCHLOA PHYLLOPOGON; ESCARDA; MALEZAS. |
|
Asunto categoría : |
H60 Malezas y escardas |
|
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/5240/1/Perez-arb-2006-1.pdf
|
|
Marc : |
LEADER 02811naa a2200253 a 4500
001 1032834
005 2019-10-11
008 2006 bl uuuu u00u1 u #d
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
Descargar
Esconder MarcPresentar Marc Completo |
|
Registro original : |
INIA Treinta y Tres (TT) |
|
|
Biblioteca
|
Identificación
|
Origen
|
Tipo / Formato
|
Clasificación
|
Cutter
|
Registro
|
Volumen
|
Estado
|
Volver
|
|
|
 | Acceso al texto completo restringido a Biblioteca INIA Las Brujas. Por información adicional contacte bibliolb@inia.org.uy. |
|
Registro completo
|
|
Biblioteca (s) : |
INIA Las Brujas. |
|
Fecha actual : |
21/02/2014 |
|
Actualizado : |
15/10/2019 |
|
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
|
Circulación / Nivel : |
A - 2 |
|
Autor : |
ANTÚNEZ, K.; D'ALESSANDRO, B.; CORBELLA, E.; RAMALLO, G.; ZUNINO, P. |
|
Afiliación : |
KARINA ANTÚNEZ, Laboratorio de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Uruguay; BRUNO D'ALESSANDRO, Laboratorio de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Uruguay; EDUARDO DANIEL CORBELLA GONZALEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GUSTAVO NOEL RAMALLO MEDINA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; PABLO ZUNINO, Laboratorio de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Uruguay. |
|
Título : |
Honeybee viruses in Uruguay. (Short Communication). |
|
Fecha de publicación : |
2006 |
|
Fuente / Imprenta : |
Journal of Invertebrate Pathology, September 2006, Volume 93, Issue 1, Pages 67-70. |
|
ISSN : |
0022-2011 |
|
DOI : |
10.1016/j.jip.2006.05.009 |
|
Idioma : |
Inglés |
|
Notas : |
Article history: Received 29 December 2005 / Accepted 25 May 2006 / Available online 14 July 2006. |
|
Contenido : |
ABSTRACT.
Mortality of honeybees is a serious problem that beekeepers have to face periodically in Uruguay and worldwide. The presence of RNA viruses, in addition to other pathogens may be one of its possible causes. In this work, we detected Chronic bee paralysis virus, Acute bee paralysis virus, Black queen cell virus, Sacbrood virus and Deformed wing virus in samples of Uruguayan honeybees with or without Varroa destructor and Nosema apis. The detection of viruses in different provinces, simultaneous co-infection of colonies by several viruses and the fact that 96% of the samples were infected with one or more virus, indicates they are widely spread in the region.
© 2006 Elsevier Inc. All rights reserved. |
|
Palabras claves : |
Acute bee paralysis virus; Black queen cell virus; Chronic bee paralysis virus; Deformed wing; HONEYBEES; Sacbrood virus. |
|
Asunto categoría : |
-- |
|
Marc : |
LEADER 01616naa a2200277 a 4500
001 1012811
005 2019-10-15
008 2006 bl uuuu u00u1 u #d
022 $a0022-2011
024 7 $a10.1016/j.jip.2006.05.009$2DOI
100 1 $aANTÚNEZ, K.
245 $aHoneybee viruses in Uruguay. (Short Communication).$h[electronic resource]
260 $c2006
500 $aArticle history: Received 29 December 2005 / Accepted 25 May 2006 / Available online 14 July 2006.
520 $aABSTRACT. Mortality of honeybees is a serious problem that beekeepers have to face periodically in Uruguay and worldwide. The presence of RNA viruses, in addition to other pathogens may be one of its possible causes. In this work, we detected Chronic bee paralysis virus, Acute bee paralysis virus, Black queen cell virus, Sacbrood virus and Deformed wing virus in samples of Uruguayan honeybees with or without Varroa destructor and Nosema apis. The detection of viruses in different provinces, simultaneous co-infection of colonies by several viruses and the fact that 96% of the samples were infected with one or more virus, indicates they are widely spread in the region. © 2006 Elsevier Inc. All rights reserved.
653 $aAcute bee paralysis virus
653 $aBlack queen cell virus
653 $aChronic bee paralysis virus
653 $aDeformed wing
653 $aHONEYBEES
653 $aSacbrood virus
700 1 $aD'ALESSANDRO, B.
700 1 $aCORBELLA, E.
700 1 $aRAMALLO, G.
700 1 $aZUNINO, P.
773 $tJournal of Invertebrate Pathology, September 2006, Volume 93, Issue 1, Pages 67-70.
Descargar
Esconder MarcPresentar Marc Completo |
|
Registro original : |
INIA Las Brujas (LB) |
|
|
Biblioteca
|
Identificación
|
Origen
|
Tipo / Formato
|
Clasificación
|
Cutter
|
Registro
|
Volumen
|
Estado
|
Volver
|
| Expresión de búsqueda válido. Check! |
|
|
