Fecha/hora: 03/06/2024 05:04:33

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	11/04/2017	
Fecha de la última actualización: 	11/04/2017	
Autoria: 	DALLA RIZZA, M.; VILARO, F.; TORRES, D.; MAESO, D.	
Afiliación: 	MARCO DALLA RIZZA VILARO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FRANCISCO LUIS VILARO PAREJA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DIEGO GABRIEL TORRES DINI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DIEGO CESAR MAESO TOZZI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Detection of PVY extreme resistance genes in potato germplasm from the Uruguayan breeding program.	
Año de publicación: 	2006	
Fuente/Imprenta: 	American Journal of Potato Research, 2006, v. 83, no.4, p. 297-304.	
ISSN: 	1099-209X	
DOI: 	10.1007/BF02871590	
Idioma: 	Inglés	
Notas: 	Accepted for publication 14 March 2006.	
Contenido: 	ABSTRACT.

Breeding goals in potato programs encompass several important commercial traits such as market aspects (skin color, eye depth, shape), category use (fresh or processed), yield, crop duration, and pest and disease resistance. In light of medium- and long-term changes in trait requirements, breeders rely on a range of wild and commercial germplasm in their efforts to reach the multiple objectives that determine the success of a new variety. Readily selectable markers for the recognition of multiple introgressed traits in breeding populations would therefore be practical high-value tools. In subtropical countries, warm climate and the continuous cropping of potato promote high vector pressure and the spread of viruses, rendering seed certification schemes difficult. Potato virus Y (PVY) constitutes a constant problem in several developing countries and it was recently reported as a challenge for seed production in the U.S.A. and Spain, resulting in rejection of seed lots in certification programs. Here we report the simultaneous use of two molecular markers to identify genes for extreme resistance to PVY in the Uruguayan potato-breeding program germplasm. Simplicity and compatibility of the marker system (allele specificity) were emphasized in implementing a reliable and efficient procedure. Forty-four percent of the genotypes tested were shown to carry extreme resistance to PVY, in the majority of cases from Solanum tuberosum ssp. andigena (Ryadg). Furthermore, a single marker originating from Solanum stoloniferum (M45) could be used to recognize both Rysto and Ryadg. The molecular phenotype data corresponding to M45-Ry genotypes was in accordance with virus field exposure observations of resistance.

© Copyright 2009 Elsevier B.V., All rights reserved.	
Palabras-Clave: 	ALLELE-SPECIFIC MARKER; POTATO GERMPLASM; POTATO VIRUS Y; SOLANUM STOLONIFERUM.	
Thesagro: 	FITOMEJORAMIENTO; PAPA; POTYVIRUS; SOLANUM; SOLANUM TUBEROSUM.	
Categoría del tema: 	--	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (101340-1) - PXI - AP - DD - PP/AMER.JR.POTATO RESEARCH/2006 -  -  - DIS