Wednesday, November 15, 2006 - 2:00 PM
269-2

Detecting Marker-trait Associations in Barley Breeding Germplasm for MAS.

Kevin Smith, 411 Borlaug Hall, Univ. of MN, 1991 Upper Buford Circle, St. Paul, MN 55108

The primary means to identify markers for marker assisted selection (MAS) is by mapping quantitative trait loci (QTL) using bi-parental populations.  Often times markers identified in this way have disadvantages including lack of polymorphism in relevant breeding germplasm, loose linkage to the QTL, and/or linkage to undesirable traits (ie. linkage drag).  In addition, developing and evaluating bi-parental mapping populations requires considerable resources and many years before QTL and suitable markers for MAS are identified.  To address these challenges and accelerate the use of MAS in breeding, the Barley Coordinated Agricultural Project is developing SNP marker resources, mapping software, and a pedigree, trait, and marker database to facilitate the identification of QTL via association mapping using contemporary breeding populations.  In this presentation, I will  compare traditional QTL mapping to association mapping for the identification of markers for use in breeding resistance to Fusarium head blight in barley.

Back to Symposium--Marker-Assisted Selection Strategies in Crop Improvement
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Back to The ASA-CSSA-SSSA International Annual Meetings (November 12-16, 2006)