Fecha/hora: 26/07/2024 21:24:51

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	27/04/2021	
Fecha de la última actualización: 	27/04/2021	
Autoria: 	ARIAS, M.; CURBELO, N.; GONZÁLEZ, P.; VICENTE, E.; GIMÉNEZ, G.; GALVÁN, G.	
Afiliación: 	MARIANA ARIAS, Departamento de Producción Vegetal, Centro Regional Sur (CRS), Facultad de Agronomía, Universidad de la República, Uruguay; NATALIA CURBELO, Departamento de Producción Vegetal, Centro Regional Sur (CRS), Facultad de Agronomía, Universidad de la República, Uruguay; PABLO GONZÁLEZ RABELINO, Departamento de Protección Vegetal, Facultad de Agronomía, Universidad de la República, Uruguay; CARLOS ESTEBAN VICENTE CASTRO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GUSTAVO GIMÉNEZ FRANQUEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GUILLERMO A. GALVÁN, Departamento de Producción Vegetal, Centro Regional Sur (CRS), Facultad de Agronomía, Universidad de la República, Uruguay.	
Título: 	Inheritance of resistance against Peronospora destructor in onion cv. 'Regia'.	
Año de publicación: 	2020	
Fuente/Imprenta: 	Australian Journal of Crop Science, 2020, Volume 14, Issue 12, Pages 1999-2009. OPEN ACCESS. Doi:	
ISSN: 	1835-2693	
DOI: 	10.21475/ajcs.20.14.12.2883	
Idioma: 	Inglés	
Notas: 	Article history: Published, December 2020.
The first author acknowledges the postgraduate fellowship from Sistema Nacional de Becas, Agencia Nacional de Investigación e Innovación (SNB-ANII), Uruguay.	
Contenido: 	ABSTRACT.
Onion downy mildew (DM) caused by Peronospora destructor is a very destructive leaf disease. Genetic resistance is an economic and environmentally friendly way of disease control. In this research, the segregation of DM resistance was analysed in six offspring from crosses between national cultivars and the cv. ?Regia?, a partial resistance source. F1 plants were self-fertilised, and F1S1 derived progenies were evaluated. The segregations in DM severity were skewed towards susceptibility, with transgressive segregation in five of six progenies. The recessive inheritance could be associated with loss of susceptibility mechanisms. In another experiment, the response of advanced F1S2 lines ?Regia? x ?Pantanoso del Sauce? were evaluated two times (August and November 2017) in DM disease severity, DM histological quantitative differences, and agronomic traits. F1S2 lines, which have had an earlier selection process, presented an intermediate DM severity between the parents. Disease severity was positively correlated with histological differences in the proportion of infected stomata. ?Regia? presented the lowest DM severity and the highest percentage of healthy stomata. Most resistant F1S2 lines did not differ from control cultivars in bulb yield, bulb quality traits and postharvest behaviour, and could be the basis to develop a DM resistant cultivar in comparison to currently grown cultivars.
© 2020. All Rights Reserved.	
Palabras-Clave: 	'Dulce'; 'INIA Casera'; 'INIA Fagro Dulce'; 'Pantanoso del Sauce CRS'; 'Pantanoso'; Oomycete; Partial resistance; Recessive resistance; Transgressive segregation.	
Categoría del tema: 	F30 Genética vegetal y fitomejoramiento	
URL: 	https://www.cropj.com/arias_14_12_2020_1999_2009.pdf	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (102645-1) - PXI - AP - DD - PP/AJCS/2020 -  -  - DIS