title: Genome sequencing supports a multi-vertex model for Brassiceae species.
abstract: The economically important Brassica genus is a good system for studying the evolution of polyploids. Brassica genomes have undergone whole genome triplication (WGT). Subgenome dominance phenomena such as biased gene fractionation and dominant gene expression were observed in tripled genomes of Brassica. The genome of radish (Raphanus sativus), another important crop of tribe Brassiceae, was derived from the same WGT event and shows similar subgenome dominance. These findings and molecular dating indicate that radish occupies a similar evolutionary origin as that of Brassica species. Here, we extended the Brassica "triangle of U" to a multi-vertex model. This model describes the relationships or the potential of using more Brassiceae mesohexaploids in the creation of new allotetraploid oil or vegetable crop species.
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Cheng
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing, China.
authors.forename: Jianli
authors.initials: J
authors.lastname: Liang
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing, China.
authors.forename: Chengcheng
authors.initials: C
authors.lastname: Cai
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Cai
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Wu
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Sino-Dutch Joint Laboratory of Horticultural Genomics, Beijing, China. Electronic address: wangxiaowu@caas.cn.
authors.forename: Xiaowu
authors.initials: X
authors.lastname: Wang
mesh_terms: D019607:Brassicaceae / Q000235:genetics*; D019143:Evolution, Molecular; D005799:Genes, Dominant; D049810:Genetic Speciation; D018745:Genome, Plant; D008957:Models, Genetic; D011123:Polyploidy; D012641:Selection, Genetic