title: Genetic changes following hybridization and genome doubling in synthetic Brassica napus.
abstract: Genetic changes were investigated in two sets of independently synthesized Brasscia napus allopolyploids by the AFLP approach in the present study. We found that 1.17 % of the loci showed genetic changes following both hybridization and genome doubling in the synthesized B. napus F04J2 relative to its diploid progenitors, B. rapa (AA genome) and B. oleracea (CC genome). No significant difference between the proportion of A-genome-specific genetic changes and that of C-genome-specific genetic changes was detected in B. napus F04J2. Approximately 0.6 % of the loci displayed genetic changes following somatic genome doubling in the amphidiploid B. napus DCE11 relative to the amphihaploid in the dimorphic plants. This study showed that rapid genetic changes occurred after hybridization and/or genome doubling in synthesized B. napus allopolyploids and indicated that both hybridization and genome doubling could affect the genomic architecture in newly formed allopolyploids.
authors.affiliation: Engineering Research Center of Wetland Agriculture in the Middle Reaches of the Yangtze River, Ministry of Education, College of Agriculture, Yangtze University, Jingzhou 434025, Hubei, China.
authors.forename: Yanhao
authors.initials: Y
authors.lastname: Xu
authors.forename: Hong
authors.initials: H
authors.lastname: Xu
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Wu
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Fang
authors.forename: Jianbo
authors.initials: J
authors.lastname: Wang
mesh_terms: D029688:Brassica napus / Q000235:genetics*; D004171:Diploidy; D018745:Genome, Plant / Q000235:genetics*; D006824:Hybridization, Genetic; D057891:Tetraploidy