Fig. 2

Expression levels and petal area phenotypes of candidate genes. a Representation of predicted genes in the 15 kb region of LD associated with variation for petal size. Predicted and known functions of genes in the LD block are shown. The diagram is not to scale. b Mean gene expression levels of candidate genes in petals of three small and three large petal accessions. These are shown in Fig. 1e. Expression of At4g16850 was significantly increased (P < 0.001) in large petal accessions. Expression levels are relative to EF1ALPHA gene expression. Data are given as means of +/−SE (n = 3 biological replicates. P values were determined by Student’s t-test. ns is not significant. c Petal areas of T-DNA insertion alleles of candidate genes in accession Col-0. ns is not significant. No T-DNA mutant was available for At4g16850