Li, Changbao , Hammond, Mark , Wang, Lijuan , Schemske, Douglas .
Genetic analysis of vernalization response in natural populations of Arabidopsis thaliana.
Vernalization is a process which promotes flowering through prolonged exposure to cold temperatures. Molecular and genetic analysis has identified FLOWERING LOCUS C (FLC) as a critical regulator of the vernalization pathway, and variation in the epigenetic silencing of FLC results in varying vernalization response in natural populations. Although significant advances have been made in recent years, further efforts are needed to clarify the genetic and molecular basis that controls variation in the vernalization response of natural populations. Towards this goal, we have collected populations of Arabidopsis thaliana from Sweden (Rodasen and Skuleberget) and Italy (Belmonte and Bolsena), representing the northern and southern European limits of its natural geographic range. Plants from Sweden require prolonged exposure to cold temperature for the transition from vegetative growth to reproductive stage, whereas plants from Italy do not require vernalization. We have analyzed the molecular variation in known genes related to vernalization and our results further support the role of FLC in controlling vernalization. We have conducted QTL analysis to identify the genetic elements that control vernalization response. Six QTLs contributed significantly to vernalization, including a new locus.
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1 - Michigan State University, Plant Biology, 166 Plant Biology Building, Michigan State University, East Lansing, MI, 48824, USA
2 - Michigan State University, , Plant Biology, 166 Plant Biology Building, Michigan State University, East Lansing, MI, 48824, USA
3 - Michigan State University, Department of Plant Biology, 166 Plant Biology Building, East Lansing, Michigan, 48824-1312, USA
Presentation Type: Oral Paper:Papers for Topics
Location: Williford A/Hilton
Date: Tuesday, July 10th, 2007
Time: 4:45 PM