Genetic diversity of cultivated roses evaluated by a gene responsible for continuous-flowering character

2014 Fiscal Year Final Research Report

• Project/Area Number: 24688004
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Horticulture/Landscape architecture
• Research Institution: Osaka Institute of Technology
• Principal Investigator: KAWAMURA Koji 大阪工業大学, 工学部, 講師 (00595613)
• Co-Investigator(Renkei-kenkyūsha): MATSUMOTO Shogo 名古屋大学, 大学院生命農学研究科, 教授 (90241489) ; UEDA Yoshihiro 岐阜国際園芸アカデミー ; IWATA Hikaru NPOバラ文化研究所 ; FOUCHER Fabrice フランス国立農業研究所(INRA), 主任研究員
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 四季咲き性 / 遺伝子資源 / レトロトランスポゾン / TERMINAL FLOWER 1 / バラ属 / 自家不和合性 / 栽培化

Outline of Final Research Achievements

Modern cultivated roses flower continuously during all favorable seasons (i.e., continuous-flowering). In contrast, most wild species flower once per year (i.e., once-flowering). The continuous-flowering character resulted from a genetic mutation in KSN gene, a floral repressor. Genotyping of KSN gene for a wide range of modern cultivars shows the presence of the mutated allele in their genome, demonstrating that their continuous-flowering behavior has a single genetic origin. In contrast, a few wild species and old cultivars with continuous-flowering behaviors do not have any obvious mutations in KSN gene, indicating that they have a novel genetic origin of continuous-flowering behavior. These roses can be good breeding materials for a new continuous-flowering rose.

Free Research Field

分子遺伝学