The association of flowering time quantitative trait loci with duplicated regions and candidate loci in Brassica oleracea

A population of 150 doubled haploid lines of rapid cycling Brassica oleracea, derived from an F1 from a var. alboglabra x var. italica cross, was scored for flowering time in two trials. Using information on 82 mapped molecular markers, spread evenly across the nine linkage groups, QTL were identifi...

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Bibliographic Details
Published in:Genetics (Austin) 1998-09, Vol.150 (1), p.393-401
Main Authors: Bohuon, E.J.R. (John Innes Centre for Plant Science Research, Norwich, UK.), Ramsay, L.D, Craft, J.A, Arthur, A.E, Marshall, D.F, Lydiate, D.J, Kearsey, M.J
Format: Article
Language:English
Subjects:
ADDITIVE EFFECTS
Brassica - genetics
Brassica - physiology
BRASSICA OLERACEA
BRASSICA OLERACEA ITALICA
BRASSICA OLERACEA VAR. ALBOGLABRA
Chromosome Mapping
CHROMOSOME MAPS
COMPARATIVE MAPPING
DOUBLED HAPLOID LINES
FLOWERING
Flowers & plants
GENETIC EFFECTS
Genetic Linkage
GENETIC MAPPING
GENETIC MAPS
GENETIC MARKERS
GENETIC PARAMETERS
GENETIC VARIANCE
GENETICS
HYBRIDS
INTERSPECIFIC HYBRIDIZATION
LINES
LINKAGE GROUPS
LOCI
Polymorphism, Genetic
Quantitative Trait, Heritable
RFLP
TIME
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Summary:A population of 150 doubled haploid lines of rapid cycling Brassica oleracea, derived from an F1 from a var. alboglabra x var. italica cross, was scored for flowering time in two trials. Using information on 82 mapped molecular markers, spread evenly across the nine linkage groups, QTL were identified at six locations; one each on linkage groups O2 and O3 and two each on linkage groups O5 and O9. In total, these QTL explained 58 and 93% of the genetical variation in the two trials. Three of these QTL, on linkage groups O2, O3, and O9, were situated in regions showing considerable homology both with each other and with chromosome regions of B. nigra that have been shown to affect flowering time. These same regions are all homologous to a single tract of Arabidopsis chromosome 5, which contains a number of the flowering-related genes, one or more of which may be candidates for the QTL found in Brassica.
ISSN:0016-6731
1943-2631
1943-2631
DOI:10.1093/genetics/150.1.393