Plant development and evolution: Lessons learned from candidate genes
Doust, Andrew N , Gadberry, Mike , Kellogg, Elizabeth .
Inflorescence evolution in grasses: insights from genetics and development.
Inflorescence architecture varies tremendously across the approximately 10,000 species of grasses. Optimization of morphological and developmental inflorescence characters on molecular phylogenies reveals high levels of homoplasy, suggesting that it is relatively easy to combine simple developmental changes to achieve morphologically diverse inflorescence architectures. Information on developmentally important genes from model systems such as rice, maize and barley have given us many insights into processes controlling inflorescence development. The present challenge is to generalize and test these genes as candidates for control and diversification of development leading to morphological diversity. Results from our work in the millet grasses indicate that obvious candidate genes from maize may explain some but not all of the phenotypic variation revealed through quantitative trait loci analysis, and that genomic approaches are needed to identify further genes worthy of testing. These results suggest that the candidate gene approach is best used in combination with other approaches such as QTL and microarrays in order to accurately connect variation at the genotypic and phenotypic levels.
1 - University of Missouri-St. Louis, Biology, 8001 Natural Bridge Road, St. Louis, Missouri, 631321, USA
Presentation Type: Symposium
Location: Ballroom 1 (Cliff Lodge)
Date: Wednesday, August 4th, 2004
Time: 8:45 AM