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. 2015 Sep 30;5:14139. doi: 10.1038/srep14139

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(a) Phylogenetic analysis of PRE family genes in Amborella trichopoda, Arabidopsis thaliana, G. raimondii and G. barbadense. Subfamilies are overlaid with different colors, and the curved dotted lines indicate homoeologous gene pairs expressed in fiber. (b) GbPRE1 (GOBAR_AA33780, GOBAR_DD03693) is a fiber-specific gene with strong A_t bias expression. The expression levels (RPKM) in ovules (0 DPA) and fiber cells (5, 10, 20, and 30 DPA) are shown. Detailed expression data are provided in Supplementary Table 10. (c) Hierarchical clustering analysis of expression of PRE genes in G. barbadense. LB, leaf bud; YL, young leaf; ML, mature leaf; O, ovule; F, fiber; DPA, days post-anthesis.