| Abstract Detail
Evolutionary Development Hasebe, Mitsuyasu [1]. Evolution of developmental genes in land plants. One of the major findings in evolutionary developmental biology is the conservation of genetic networks of developmental genes in extant metazoans, which diverged 630 million years ago. After the establishment of general developmental networks in the common ancestor of bilateral metazoans, the networks changed with gene duplications and subsequently gene losses, which caused present diversity of metazoans. Land plants are the other major multicellular organisms, which landed around 480 million years ago. The evolution of developmental genes in land plants is still a challenging issue, because genome information was only available in angiosperms, which originated around 200 million years ago. Recently, whole genomes of the green algae Chlamydomonas reinhardtii, the moss Physcomitrella patens, and the lycopod Selaginella moellendorffii were mostly sequenced and genome-wide comparisons of developmental genes became possible. We used 700 Arabidopsis thaliana developmental genes as queries and searched homologous genes in other organisms. Phylogenetic trees of the homologs were constructed using the neighbor-joining and maximum likelihood methods, and the existence of potential orthologous genes was examined. Conservation and divergence of developmental genes in land plants will be discussed. Log in to add this item to your schedule
Related Links: Hasebe Lab Web Page
1 - National Institute for Basic Biology, Laboratory of Evolutionary Biology, 38 Nishigonaka, Myodaiji-cho, Okazaki, AICHI, 444-8585, Japan
Keywords: genome development gene duplication gene loss Chlamydomonas Selaginella moellendorffii Physcomitrella patens.
Presentation Type: ASPB Major Symposium Session: S04 Location: International Ballroom/Hilton Date: Monday, July 9th, 2007 Time: 2:40 PM Number: S04002 Abstract ID:1212 |