Fig. 1

Sequence variations within BnaFRIs. a Exon-intron structure of BnaA3.FRI, BnaA10.FRI, and BnaC3.FRI. Black rectangles indicate exons, white rectangles indicate introns. Numbers above gene structures indicate the base pair positions that relative to the ATG start codon. The positions of these three BnaFRIs referred to the respective paralogue in winter-type cv. Tapidor. Triangles indicate INDELs, and the numbers below each triangle indicate the length of INDELs. Arrows mark the position and orientation of INDEL markers. b The nine haplotypes (HAP1-HAP9) of BnaA3.FRI in 30 B. napus accessions. The sequenced fragment included 200 bp 5’ UTR and 2.2 Kb gene regions of BnaA3.FRI. Base pair position of + 1 is given relative to the ‘ATG’ start codon. Pos., the positions of nucleotide and amino acid refer to the HAP1, which represented by winter-type cv. Tapidor. ‘mHAP’, marker-based haplotype. ‘HAP’, haplotype inferred by gene sequence. ‘+’ indicate insertion, ‘—’ indicate deletion. ‘.’ indicates the same sequence with HAP1