ARS | Publication request: Candidate genes associated with QTL controlling resistance to fusarium root rot in pea

Submitted to: Plant and Animal Genome VX Conference Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: January 12, 2007
Publication Date: January 12, 2007
Citation: Coyne, C.J., Pilet-Nayel, M.-L 2008. Candidate genes associated with QTL controlling resistance to fusarium root rot in pea. Plant and Animal Genome VX Conference Abstracts. January 12-16, San Diego, CA.

Technical Abstract: Fusarium root rot (FRR) of pea (Pisum sativum L.) is a serious pathogen in the USA and Europe and genetic resistance offers an effective and economical control for this pathogen. Fusarium root rot is caused by the fungus pathogen (Haematonectria haematococca (Berk. & Broome) (Anamorph): Fusarium solani (Mart.) Sacc. Inheritance of quantitative genetic resistance having highly significant general combining ability has been reported using cultivars crossed with plant introduction material suggesting additive gene action (Muehlbauer and Kraft, 1973). Previously, we identified three QTL associated with resistance on linkage group II (LOD 6.1, R2=22%), III (LOD 4.1, R2=10%), VI (LOD 3.3, R2=8%) and STMS markers for use in marker assisted breeding. Recently, one published pea resistance gene, DRR230 was mapped to the same pea linkage group regions as one of the QTL on LG III. We are confirming the relationship using association mapping in the FRR phenotyped USDA pea core collection and in a second RIL mapping population.