Fig. 1

Phenotypic comparison between two B. rapa accessions. a Comparison of SZ and SC in SWUK3 and SWUK4. b Comparison of SZ of seeds sampled at seven seed developmental stages and dry mature seeds. c Comparison of OC in seeds sampled at seven seed developmental stages and dry mature seeds. d Comparison of SZ increase between two adjacent sampling stages. e Comparison of OC increase between two adjacent sampling stages. Values are the mean ± standard error (SE) of three biological replicates. Student’s t-test was used for statistical analysis of data from the two B. rapa accessions (**P < 0.01; ***P < 0.001)