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Abstract Detail


Evolution of Flower Development: from Phenotypes to Genes

Hileman, Lena [1].

Symmetry genes an the evolution of floral phenotypes among close relatives of snapdragon (Antirrhinum majus).

In the model plant species Antirrhinum majus (snapdragon), a network of genetic interactions has been described that establish bilateral flower symmetry, including adaxial (dorsal) stamen abortion, and organ number in the 2nd and 3rd floral whorls. CYCLOIDEA (CYC), DICHOTOMA (DICH), and RADIALIS (RAD) establish dorsal flower identity, whereas DIVARICATA (DIV) gene products specify ventral petal identity. Among close relatives of snapdragon, we observe evolutionary reductions in stamen number through reduction of one of the two remaining stamen pairs. Our goal is to use expression and functional analyses to determine the specific role that dorsal identity genes have played in shaping dorsal petal morphology and variation in stamen number in three lineages closely related to snapdragon; Mohavea, Gratiola and Veronica.


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1 - University of Kansas, Ecology and Evolutionary Biology, 1200 Sunnyside Ave., Lawrence, KS, 66045, USA

Keywords:
stamen abortion
symmetry
cycloidea.

Presentation Type: Symposium or Colloquium Presentation
Session: SY17
Location: Stevens 4/Hilton
Date: Wednesday, July 11th, 2007
Time: 11:30 AM
Number: SY17006
Abstract ID:592


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