title: Diversification and evolution of the SDG gene family in Brassica rapa after the whole genome triplication.
abstract: Histone lysine methylation, controlled by the SET Domain Group (SDG) gene family, is part of the histone code that regulates chromatin function and epigenetic control of gene expression. Analyzing the SDG gene family in Brassica rapa for their gene structure, domain architecture, subcellular localization, rate of molecular evolution and gene expression pattern revealed common occurrences of subfunctionalization and neofunctionalization in BrSDGs. In comparison with Arabidopsis thaliana, the BrSDG gene family was found to be more divergent than AtSDGs, which might partly explain the rich variety of morphotypes in B. rapa. In addition, a new evolutionary pattern of the four main groups of SDGs was presented, in which the Trx group and the SUVR subgroup evolved faster than the E(z), Ash groups and the SUVH subgroup. These differences in evolutionary rate among the four main groups of SDGs are perhaps due to the complexity and variability of the regions that bind with biomacromolecules, which guide SDGs to their target loci.
authors.affiliation: Laboratory of Cell &Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China.|Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China.|Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology Hangzhou, 310058, China.
authors.forename: Heng
authors.initials: H
authors.lastname: Dong
authors.affiliation: Laboratory of Cell &Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China.|Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China.|Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology Hangzhou, 310058, China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Liu
authors.affiliation: Laboratory of Cell &Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China.|Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China.|Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology Hangzhou, 310058, China.
authors.forename: Tianyu
authors.initials: T
authors.lastname: Han
authors.affiliation: Laboratory of Cell &Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China.|Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China.|Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology Hangzhou, 310058, China.
authors.forename: Yuxue
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Wenzhou Vocational College of Science and Technology, Wenzhou, 325006, China.
authors.forename: Ji
authors.initials: J
authors.lastname: Sun
authors.affiliation: Wenzhou Vocational College of Science and Technology, Wenzhou, 325006, China.
authors.forename: Sue
authors.initials: S
authors.lastname: Lin
authors.affiliation: Laboratory of Cell &Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China.|Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China.|Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology Hangzhou, 310058, China.
authors.forename: Jiashu
authors.initials: J
authors.lastname: Cao
authors.affiliation: Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, 310058, China.|School of Science and Health, Western Sydney University, Penrith, NSW 2751, Australia.
authors.forename: Zhong-Hua
authors.initials: ZH
authors.lastname: Chen
authors.affiliation: Laboratory of Cell &Molecular Biology, Institute of Vegetable Science, Zhejiang University, Hangzhou, 310058, China.|Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Hangzhou, 310058, China.|Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology Hangzhou, 310058, China.
authors.forename: Li
authors.initials: L
authors.lastname: Huang
mesh_terms: D029741:Brassica rapa / Q000201:enzymology / Q000235:genetics*; D002478:Cells, Cultured; D019143:Evolution, Molecular; D015870:Gene Expression; D018745:Genome, Plant; D011495:Histone-Lysine N-Methyltransferase / Q000235:genetics* / Q000378:metabolism; D009928:Organ Specificity; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics* / Q000378:metabolism; D011003:Ploidies; D017434:Protein Structure, Tertiary; D021381:Protein Transport; D026801:Synteny; D014026:Nicotiana
chemical_list: D010940:Plant Proteins; D011495:Histone-Lysine N-Methyltransferase