Mapping of a Novel source of non-race-specific leaf rust resistance in the CIMMYT wheat line Weebill 1
Material type:
TextPublication details: 2010Description: 1 pageSummary: Leaf rust, caused by the fungal pathogen Puccinia triticina is the most prevalent disease of wheat worldwide. Of the many resistance genes discovered, the ones exhibiting adult-plant-resistance (also known as a slow-rusting response) appear to be the ones with the greatest potential to deliver durable leaf rust resistance. The CIMMYT wheat line Weebill 1 exhibits strong quantitative resistance that is a characteristic of the presence of one or more adult-plant-resistance genes. Previous work has determined that this source of resistance is not attributable to Lr34, and although a source of APR gene Lr46 is present in its pedigree, the resistance being displayed is likely due to one or more additional adult-plant-resistance genes. In order to identify and map these sources of resistance, a population of 92 recombinant-inbred-lines was genotyped with 341 polymorphic simple-sequence-repeat markers and phenotyped at a total of five locations in Minnesota and Mexico. The results of this QTL analysis indicate a likely QTL on chromosome 7B, as well as other possible QTL on chromosomes 2B and 5A. Another QTL region was identified on the long arm of chromosome 1B as well, and this was identified as Lr46, confirming the presence of the APR gene in Weebill 1. These newly identified APR QTL can contribute to high levels of resistance.
| Item type | Current library | Collection | Call number | Status | Date due | Barcode | Item holds | |
|---|---|---|---|---|---|---|---|---|
| Conference proceedings | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Staff Publications Collection | CIS-6159 (Browse shelf(Opens below)) | Available |
Browsing CIMMYT Knowledge Center: John Woolston Library shelves, Collection: CIMMYT Staff Publications Collection Close shelf browser (Hides shelf browser)
Leaf rust, caused by the fungal pathogen Puccinia triticina is the most prevalent disease of wheat worldwide. Of the many resistance genes discovered, the ones exhibiting adult-plant-resistance (also known as a slow-rusting response) appear to be the ones with the greatest potential to deliver durable leaf rust resistance. The CIMMYT wheat line Weebill 1 exhibits strong quantitative resistance that is a characteristic of the presence of one or more adult-plant-resistance genes. Previous work has determined that this source of resistance is not attributable to Lr34, and although a source of APR gene Lr46 is present in its pedigree, the resistance being displayed is likely due to one or more additional adult-plant-resistance genes. In order to identify and map these sources of resistance, a population of 92 recombinant-inbred-lines was genotyped with 341 polymorphic simple-sequence-repeat markers and phenotyped at a total of five locations in Minnesota and Mexico. The results of this QTL analysis indicate a likely QTL on chromosome 7B, as well as other possible QTL on chromosomes 2B and 5A. Another QTL region was identified on the long arm of chromosome 1B as well, and this was identified as Lr46, confirming the presence of the APR gene in Weebill 1. These newly identified APR QTL can contribute to high levels of resistance.
Global Wheat Program
English
INT0610
CIMMYT Staff Publications Collection
Click on an image to view it in the image viewer