Marker-assisted selection for complex trait in common bean (Phaseolus vulgaris L.) using QTL-based index |
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| Authors: | Bunyamin Tar'an Thomas E Michaels K Peter Pauls |
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| Institution: | (1) Department of Plant Agriculture, Crop Science Building, University of Guelph, Guelph, Ontario, Canada, N1G 2W1 |
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| Abstract: | A procedure was developed for marker-assisted selection of complex traits for common bean (Phaseolus vulgarisL.) using an index based on QTL-linked markers and ultrametric genetic distances between lines and a target parent. A comparison
of the mean seed yields of the top five lines selected by different schemes demonstrated that the highest yielding group was
selected on the basis of a combination of phenotypic performance and a high QTL-based index,followed by groups identified
by a high QTL-based-index, conventional selection,and a low QTL-based-index. This study demonstrated a simple way to use information
obtained from QTL studies to make selection decisions. The study also showed that the use of the QTL-based-index in conjunction
with the ultrametric genetic distance to the target parent would enablea plant breeder to select lines that retain important
QTL in a desirable genetic background. Therefore, this type of MAS would be expected to be superior to the phenotypic selection.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | common bean genetic distance Marker-assisted selection quantitative trait loci |
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