Original Article
Heredity (1999) 83, 586–596; doi:10.1038/sj.hdy.6886050
More QTL for flowering time revealed by substitution lines in Brassica oleracea
A M Rae1, E C Howell1 and M J Kearsey1
1Plant Genetics and Cell Biology Group, School of Biological Sciences, The University of Birmingham, Birmingham B15 2TT, UK
Correspondence: M J Kearsey, E-mail: m.j.kearsey@bham.ac.uk
Received 17 March 1999; Accepted 27 May 1999.
Abstract
Seventy-nine recombinant backcross substitution lines from a cross between Brassica oleracea var. italica and Brassica oleracea var. alboglabra were grown in field trials over five years along with the alboglabra recurrent parent. Plants were scored for the days from sowing to the opening of the first flower, and lines that flowered significantly earlier or later than the recurrent parent were identified. Based on the lengths of the substitutions, evidence for 11 QTL on chromosomes O1, O2, O3, O5 and O9 was found, five of which mapped to similar regions to five of the six found in a previous analysis of doubled haploid lines from the same cross. Several of the QTL were linked closely in repulsion.
Keywords:
Brassica, flowering time, QTL analysis, substitution lines
