Quantitative trait loci associated with red foliage in <Emphasis Type="Italic">Cornus florida</Emphasis> L. |
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Authors: | Phillip A Wadl Arnold M Saxton Xinwang Wang Vince R Pantalone Timothy A Rinehart Robert N Trigiano |
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Institution: | (1) Department of Entomology and Plant Pathology, University of Tennessee, 2431 Joe Johnson Drive, 205 Ellington Plant Science Building, Knoxville, TN 37996-4560, USA;(2) Department of Animal Science, University of Tennessee, 2640 Morgan Circle Drive, 201a McCord Hall, Knoxville, TN 37996, USA;(3) Texas AgriLife Research and Extension Center, Texas A&M University, 17360 Coit Road, Dallas, TX 75252, USA;(4) Department of Plant Sciences, University of Tennessee, 2431 Joe Johnson Drive, Knoxville, TX 37996-4561, USA;(5) United States Department of Agriculture-Agricultural Research Service, Thad Cochran Southern Horticultural Laboratory, 810 Highway 26 West, Poplarville, MS 39470, USA |
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Abstract: | The objective of our investigation was to acquire information on the association between molecular markers and foliage color
in flowering dogwood in order to improve our understanding of the inheritance of this trait and to make possible early selection
of red foliage genotypes in breeding programs. A segregating pseudo-F2 population of 94 individuals of flowering dogwood (Cornus florida L.), together with 255 simple sequence repeat markers, was used to identify putative quantitative trait loci (QTL) for foliage
color. Foliage color segregated into green- and red-leaved phenotypes and was visually rated for color on five spring dates
over 3 years (2007–2009). Repeated measures single-marker categorical analysis of variance (ANOVA) identified four putative
QTL (CF309C, CF792A, CF367B, and CF367C) on three linkage groups. Single-marker categorical ANOVA was then used to determine
stability of QTL across dates. We identified different QTL, found a low percentage of phenotypic variance explained by the
QTL, and detected QTL instability over time, providing evidence of the complex genetics for red pigment expression in flowering
dogwood. |
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