Figure 1.

Overview of the experimental design of the microRNA‐sequencing assay.

(a) Dendrogram showing the phylogenetic relationships among heading morphotypes Chiifu and HN53, and non‐heading morphotype Taicai WS. Gray fonts denote other phylogenetically distant Brassica rapa morphotypes.

(b) Leaf sampling process. The third visible leaf (count from inside out, yellow color) was collected.

(c) Schematic overview of the experimental design for three morphotypes. [Colour figure can be viewed at wileyonlinelibrary.com]