The use of wheat/goatgrass introgression lines for the detection of gene(s) determining resistance to septoria tritici blotch (Mycosphaerella graminicola)

At the IPK Gatersleben a series of 85 bread wheat (T. aestivum)/goatgrass (Aegilops tauschii) introgression lines was developed recently. Based on the knowledge that chromosome 7D of this particular Ae. tauschii is a donor of resistance to septoria tritici blotch (Mycosphaerella graminicola), a sub-...

Full description

Bibliographic Details
Authors: Simón, María Rosa, Ayala, F.M., Cordo, Cristina Alicia, Roder, M.S., Borner A.
Format: article
Status:Published version
Publication Date:2006
Country:Argentina
Institution:Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
Repository:CIC Digital (CICBA)
Language:English
OAI Identifier:oai:digital.cic.gba.gob.ar:11746/6971
Online Access:https://digital.cic.gba.gob.ar/handle/11746/6971
Access Level:Open access
Keyword:Agronomía, reproducción y protección de plantas
Disease resistance
Seedling stage
Adult plant stage
Septoria tritici blotch
Mycosphaerella graminicola
Aegilops tauschii
Triticum aestivum
Alien introgression
Description
Summary:At the IPK Gatersleben a series of 85 bread wheat (T. aestivum)/goatgrass (Aegilops tauschii) introgression lines was developed recently. Based on the knowledge that chromosome 7D of this particular Ae. tauschii is a donor of resistance to septoria tritici blotch (Mycosphaerella graminicola), a sub-set of thirteen chromosome 7D introgression lines was investigated along with the susceptible recipient variety ‘Chinese Spring’ (CS) and the resistant donor line ‘CS (Syn 7D)’. The material was inoculated with two Argentinian isolates of the pathogen (IPO 92067 and IPO 93014) at both the seedlings (two leaf) and adult (tillering) stages at two locations over 2 years (2003, 2004). The resistance was effective against both isolates and at both developmental stages, and the resistance locus maps to the centromeric region of chromosome arm 7DS. On the basis of its relationship with the microsatellite marker Xgwm44, it is likely that the gene involved is Stb5. Stb5 is therefore apparently effective against M. graminicola isolates originating from both Europe and South America.

Similar Items