Fecha/hora: 16/06/2024 11:51:50

Biblioteca(s): | INIA La Estanzuela; INIA Las Brujas.
Fecha corriente: | 17/10/2014
Fecha de la última actualización: | 30/10/2019
Autoria: | QUINCKE, M.; PETERSON, C.J.; ZEMETRA, R.S.; HANSEN, J.L.; CHEN, J.; RIERA-LIZARAZU, O.; MUNDT, C.C.
Afiliación: | MARTIN CONRADO QUINCKE WALDEN, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay.
Título: | Quantitative trait loci analysis for resistance to cephalosporium stripe, a vascular wilt disease of wheat.
Año de publicación: | 2011
Fuente/Imprenta: | Theoretical and Applied Genetics, 2011, v.122, No.7, p.1339-1349.
ISSN: | 0040-5752
DOI: | 10.1007/s00122-011-1535-6
Idioma: | Inglés
Notas: | Article history: Received: 20 August 2010 / Accepted: 6 January 2011 / Published online: 23 January 2011.

Contenido:

ABSTRACT.

Cephalosporium stripe, caused by Cephalosporium gramineum, can cause severe loss of wheat (Triticum aestivum L.) yield and grain quality and can be an important factor limiting adoption of conservation tillage practices. Selecting for resistance to Cephalosporium stripe is problematic; however, as optimum conditions for disease do not occur annually under natural conditions, inoculum levels can be spatially heterogeneous, and little is known about the inheritance of resistance. A population of 268 recombinant inbred lines (RILs) derived from a cross between two wheat cultivars was characterized using field screening and molecular markers to investigate the inheritance of resistance to Cephalosporium stripe. Whiteheads (sterile heads caused by pathogen infection) were measure on each RIL in three field environments under artificially inoculated conditions. A linkage map for this population was created based on 204 SSR and DArT markers. A total of 36 linkage groups were resolved, representing portions of all chromosomes except for chromosome 1D, which lacked a sufficient number of polymorphic markers. Quantitative trait locus (QTL) analysis identified seven regions associated with resistance to Cephalosporium stripe, with approximately equal additive effects. Four QTL derived from the more susceptible parent (Brundage) and three came from the more resistant parent (Coda), but the cumulative, additive effect of QTL from Coda was greater than that of Brundage. Additivity of QTL effects was confirmed through regression analysis and demonstrates the advantage of accumulating multiple QTL alleles to achieve high levels of resistanc. 
© Springer-Verlag 2011.

Palabras-Clave: | CEPHALOSPORIUM ESTRIADO; CEPHALOSPORIUM FRANJA; CEPHALOSPORIUM GRAMINEUM; CEPHALOSPORIUM RAYADO; HYMENULA CEREALIS; QTLs; RESISTENCIA A ENFERMEDADES.
Thesagro: | CULTIVARES DE TRIGO; TRIGO; TRITICUM AESTIVUM.

Categoría del tema:

F30 Genética vegetal y fitomejoramiento
F60 Fisiología y bioquímica de la planta

Registro original: | INIA Las Brujas (LB)
Ejemplares: | LB - (100202-1) - PXI - AP - DD - PP/TAG/2011 -  -  - DIS