Fecha/hora: 03/06/2024 14:35:32

Biblioteca(s): | INIA La Estanzuela.
Fecha corriente: | 27/08/2020
Fecha de la última actualización: | 21/05/2021
Autoria: | BARAIBAR, S.; GARCIA, R.; SILVA, P.; LADO, B.; CASTRO, A.; GUTIÉRREZ , L.; KAVANOVÁ, M.; QUINCKE, M.; BHAVANI , S.; RANDHAWA, M.S.; GERMAN, S.
Afiliación: | SILVINA BARAIBAR PEDERSEN, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; RICHARD ANSELMO GARCIA USUCA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARIA PAULA SILVA VILLELLA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; BETINA LADO, Facultad de Agronomía, Universidad de la República, Garzón 780, 12900 Montevideo, Uruguay.; AIREL CASTRO, Facultad de Agronomía, Universidad de la República, Estación Experimental Dr. Mario A. Cassinoni, Ruta 3, km 363, 60000 Paysandú, Uruguay; LUCIA GUTIÉRREZ, Department of Agronomy, University of Wisconsin–Madison, 1575, Linden Dr, Madison, WI 53706, USA.; MONIKA KAVANOVÁ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARTIN CONRADO QUINCKE WALDEN, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; SRIDHAR BHAVANI, International Maize and Wheat Improvement Center (CIMMYT), Km. 45, Carretera, México-Veracruz, El Batán, CP 56237 Texcoco, Edo. de México, Mexico.; MANDEEP S. RANDHAWA, International Maize and Wheat Improvement Center (CIMMYT), World Agroforestry Centre (ICRAF), United Nations Avenue, Gigiri, P.O. Box 1041, Nairobi 00621, Kenya.; SILVIA ELISA GERMAN FAEDO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.
Título: | QTL of resistance to Ug99 and other stem rust pathogen races in bread wheat.
Año de publicación: | 2020
Fuente/Imprenta: | Molecular Breeding, 1 August 2020,  Volume 40, Issue 8, Article number 82. DOI: https://doi.org/10.1007/s11032-020-01153-5
DOI: | 10.1007/s11032-020-01153-5
Idioma: | Inglés
Notas: | Article history: Received 26 June 2019/ Accepted 23 October 2019/ Published 15 August 2020.

Contenido:

Abstract:
Most wheat cultivars planted worldwide are susceptible to the stem rust Ug99 race group. To prepare for the potential spread of these races into South America, we aimed to identify genomic regions responsible for resistance to Ug99 race group in germplasm adapted to South America. Two RIL populations from a cross between a stem rust susceptible parent ?Baguette 13? and resistant local parents ?INIA Tero? and ?BR23//CEP19/PF85490? were developed. Phenotypical evaluation was completed at the seedling stage in Uruguay and under field conditions in Uruguay and Kenya. Both RIL populations were genotyped using the GBS approach. Besides Sr24, three other resistance loci in ?INIA Tero? were detected on chromosomes 2B, 6A, and 7B. All four QTL were effective to local races, whereas only the QTL on chromosome 2B was effective against the Ug99 race group. Besides Sr31, ?BR23//CEP19/PF85490? also carries two other stem rust resistance loci on chromosomes 2B and 6A. All three explained the resistance in Uruguay, while only the QTL on 2B was effective to Ug99 in Kenya. The physical location suggested that the QTL identified on chromosome 2B in both populations may correspond to Sr28, which was confirmed using specific molecular markers. Further studies are needed to determine the relationship between QTL for resistance to local races identified on chromosomes 6A and 7B and previously reported resistance genes and QTL. The results of this study are highly relevant for breeding wheat cultivars with diverse and durable resistance to stem rust.

Palabras-Clave: | GENETIC RESISTANCE; PUCCINIA GRAMINIS F. SP. TRITICI; QTL MAPPING; TRITICUM AESTIVUM.
Thesagro: | RESISTENCIA GENETICA; TRIGO.
Categoría del tema: | H20 Enfermedades de las plantas
Registro original: | INIA La Estanzuela (LE)
Ejemplares: | LE - (103172-1) - PXI - AP - DD - PP/Molecular Breeding/2020, -  -  - DIS