Developmental and Structural Section
Doust, Andrew , Mauro-Herrera, Margarita .
Lifetime development of vegetative architecture in annual grasses.
Annual grasses balance the demands of growth and reproductive development in the context of variable environmental inputs and a determinate lifespan. We have manipulated developmental patterns during domestication of annual grasses (such as wheat, rice, and maize) to maximize yield and reduce environmental sensitivity. As a result we know much about the developmental genetic changes that are involved in domestication, but much less about how components of plant architecture such as height, branching,and time to flowering interact to maximize fitness in wild species. We have approached this question using segregating populations derived from a cross between domesticated foxtail and wild green millet to examine the development and underlying genetic control of vegetative architecture over the life-cycle of the plant. We have also surveyed grass diversity to understand the phylogenetic context in which different growth strategies have arisen. We find complex interactions between genetic control of growth events and plasticity in developmental outcomes, but identify several characteristic growth patterns that suggest that some architectural solutions have been favored over others,both developmentally and in a broader phylogenetic context.
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1 - Oklahoma State University, Botany, Physical Sciences Room 301, Stillwater, OK, 74078, USA
2 - OSU, 104 LSE, Stillwater, OK, 74078, USA
Presentation Type: Oral Paper:Papers for Sections
Location: Union D/Hyatt
Date: Tuesday, July 10th, 2012
Time: 3:45 PM