Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
New slow-rusting leaf rust and stripe rust resistance genes Lr67 and Yr46 in wheat are pleiotropic or closely linked
Theoretical and Applied Genetics, Volume 122, No. 1, Year 2011
Notification
URL copied to clipboard!
Description
The common wheat genotype 'RL6077' was believed to carry the gene Lr34/Yr18 that confers slow-rusting adult plant resistance (APR) to leaf rust and stripe rust but located to a different chromosome through inter-chromosomal reciprocal translocation. However, haplotyping using the cloned Lr34/Yr18 diagnostic marker and the complete sequencing of the gene indicated Lr34/Yr18 is absent in RL6077. We crossed RL6077 with the susceptible parent 'Avocet' and developed F3, F4 and F6 populations from photoperiod-insensitive F3 lines that were segregating for resistance to leaf rust and stripe rust. The populations were characterized for leaf rust resistance at two Mexican sites, Cd. Obregon during the 2008-2009 and 2009-2010 crop seasons, and El Batan during 2009, and for stripe rust resistance at Toluca, a third Mexican site, during 2009. The F3 population was also evaluated for stripe rust resistance at Cobbitty, Australia, during 2009. Most lines had correlated responses to leaf rust and stripe rust, indicating that either the same gene, or closely linked genes, confers resistance to both diseases. Molecular mapping using microsatellites led to the identification of five markers (Xgwm165, Xgwm192, Xcfd71, Xbarc98 and Xcfd23) on chromosome 4DL that are associated with this gene(s), with the closest markers being located at 0.4 cM. In a parallel study in Canada using a Thatcher × RL6077 F3 population, the same leaf rust resistance gene was designated as Lr67 and mapped to the same chromosomal region. The pleiotropic, or closely linked, gene derived from RL6077 that conferred stripe rust resistance in this study was designated as Yr46. The slow-rusting gene(s) Lr67/Yr46 can be utilized in combination with other slow-rusting genes to develop high levels of durable APR to leaf rust and stripe rust in wheat. © 2010 Springer-Verlag.
Authors & Co-Authors
Herrera-Foessel, Sybil A.
Mexico, Texcoco
Centro Internacional de Mejoramiento de Maiz y Trigo
Lagudah, Evans S.
Australia, Melbourne
Csiro Plant Industry
Huerta, Julio
Mexico, Santa Catarina
Instituto Nacional de Investigaciones Forestales, Agricolas y Pecuarias
Hayden, Matthew J.
Australia, Melbourne
Agribio, Centre for Agribioscience
Bariana, Harbans S.
Australia, Sydney
The University of Sydney
Singh, Davinder
Kenya, Nairobi
World Agroforestry Centre
Singh, Ravi Prakash
Mexico, Texcoco
Centro Internacional de Mejoramiento de Maiz y Trigo
Statistics
Citations: 235
Authors: 7
Affiliations: 6
Identifiers
Doi:
10.1007/s00122-010-1439-x
ISSN:
00405752
Research Areas
Genetics And Genomics
Study Design
Cross Sectional Study