Mapping quantitative trait loci controlling variation in forage quality traits in barley |
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Authors: | Lisa Surber Hussein Abdel-Haleem Jack Martin Pat Hensleigh Dennis Cash Jan Bowman Tom Blake |
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Institution: | (1) Department of Animal and Range Sciences, Montana State University, Bozeman, MT 59717, USA;(2) Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT 59717, USA;(3) Center for Applied Genetic Technologies, University of Georgia, 111 Riverbend Rd, Athens, GA 30602, USA; |
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Abstract: | Barley forage quality has a direct relationship to animal performance, but forage quality traits are often neglected or not
accessible to the plant breeders. Doubled haploid lines (145) from the cross Steptoe × Morex were grown in 2 years of trails
under irrigated conditions to evaluate the variation in forage quality characteristics, identify quantitative trait loci (QTL)
for these traits and determine if variation in forage quality characteristics among barley lines is heritable. Forage quality
traits were determined at plant anthesis and at peak forage yield stages. A total of 32 QTL were identified that conditioned
forage traits at anthesis stage, and 10 QTLs were identified at peak forage yield. At anthesis, forage traits were highly
to moderate heritablely, while at peak forage yield, all traits were weakly heritable, indicating that selection progress
for these traits will be effective at early stages of maturity. This research has identified and mapped QTL for barley forage
quality and will allow deployment of genes for improved forage quality via marker-assisted selection. |
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