Fecha/hora: 01/06/2024 23:19:20

Biblioteca(s): | INIA Las Brujas.
Fecha corriente: | 10/08/2016
Fecha de la última actualización: | 12/03/2019
Autoria: | ROSAS, J.E.; MARTÍNEZ, S.; BONNECARRERE, M.; PÉREZ DE VIDA, F.; BLANCO, P.H.; MALOSETTI, M.; JANNINK, J.L.; GUTIÉRREZ, L.
Afiliación: | JUAN EDUARDO ROSAS CAISSIOLS, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; SEBASTIÁN MARTÍNEZ KOPP, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARIA VICTORIA BONNECARRERE MARTINEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FERNANDO BLAS PEREZ DE VIDA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; PEDRO HORACIO BLANCO BARRAL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARCOS MALOSETTI, Universidad de Wageningen (WU); JEAN-LUC JANNINK, USDA–ARS; LUCÍA GUTIÉRREZ, Universidad de Wisconsin-Madison.
Título: | Comparison of phenotyping methods for resistance to stem rot and aggregated sheath spot in rice.
Año de publicación: | 2016
Fuente/Imprenta: | Crop Science, 2016, v. 56, no. 4, p. 1619-1627. Open Access
DOI: | 10.2135/cropsci2015.09.0598
Idioma: | Inglés
Notas: | Article history: Published June 15, 2016.

Contenido:

ABSTRACT.

Stem and sheath diseases caused by Sclerotium oryzae Cattaneo (SCL) and Rhizoctonia oryzaesativae Sawada Mordue (ROS) can severely reduce rice (Oryza sativa L.) yield and grain quality. Genetic resistance is the best strategy to control them. Phenotypic selection for resistance is hampered due to a heterogeneous distribution of the inoculum in the soil that generates high environmental variability and decreases genetic gain. To have higher selection accuracy it is necessary to develop phenotyping methods with high repeatability and discriminative power. Comparison of greenhouse methods have been reported for Rhizoctonia solani Kühn, a more invasive pathogen than SCL and ROS, and for SCL, but no such comparisons are reported for ROS. Our study compares five inoculation methods for SCL and ROS to identify the more discriminant and repeatable method and to apply it for high-throughput phenotyping of hundreds of rice lines. A method that uses an agar disc with growing mycelium attached to the base of stems was found to have the best balance between discrimination among genotypes and variability among replicates of the same genotype for both pathogens. This method was used in five greenhouse experiments for phenotyping resistance to SCL and ROS in a population of 641 rice advanced breeding lines. Heritabilities of resistance ranged from 0.36 to 0.71 in these experiments. These findings have a direct application in screening for resistance of rice to SCL and ROS, and in high-throughput phenotyping for mapping loci associated to disease resistance.

© Crop Science Society of America.

Palabras-Clave: | RICE (ORYZA SATIVA L.).
Thesagro: | ARROZ.
Categoría del tema: | --

URL:

http://www.ainfo.inia.uy/digital/bitstream/item/5844/1/Rosas-J.E.-2016.-Crop-Science.pdf
https://dl.sciencesocieties.org/publications/cs/pdfs/56/4/1619

Registro original: | INIA Las Brujas (LB)
Ejemplares: | LB - (101062-1) - PXI - AP - DD -  -  -  - DIS