Screening and Analysis of BAC Clones Containing Flowering Time Gene FLC1 in Brassica campestris L. ssp. pekinensis Olsson Screening and Insert Size Analysis of Candidate BAC Clones from Brassica napus A Genome Screening and Analysis of BAC Clones Containing Flowering Time Gene FLC1 in Brassica campestris L. ssp. pekinensis Olsson