Plant development and evolution: Lessons learned from candidate genes
Cronk, Quentin .
Floral symmetry in rosids: patterns and genes.
Most studies of the genetic basis of floral zygomorphy (monosymmetry) have concentrated on the asterid clades. However, recent studies have indicated that monosymmetry in rosids has evolved through independent recruitment of members of the same gene family, TCP genes, that are responsible for monosymmetry in asterids. This illustrates the power of the candidate gene approach even when evolutionary events are convergent. A morphological survey of floral symmetry in the rosids reveals several independent origins of monosymmetry. Two completely sequenced rosid genomes (Arabidopsis and Populus) have given us unprecedented information about the diversity of TCP genes in this group, greatly adding to the power of phylogenomic approaches. From our knowledge of the evolution of the TCP gene family, and the expression patterns of members, general pricinples can be suggested about the origin of monosymmetry in the angiosperms and the developmental-genetic constraints on this character.
1 - University of British Columbia, UBC Botanical Garden and Centre for Plant Research, 6804 SW Marine Drive, Vancouver, British Columbia, V6T 1Z4, Canada
Presentation Type: Symposium
Location: Ballroom 1 (Cliff Lodge)
Date: Wednesday, August 4th, 2004
Time: 9:15 AM