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Abstract Detail


Berardi, Andrea [1].

Evolution of red flower color in North American Silene.

Determining how and why reproductive traits evolve between and within species is key to understanding patterns of speciation. In plants, floral traits such as color are major drivers of diversification. Flower color is a key reproductive trait in the North American species of Silene (Caryophyllaceae). Only eight species of Silene produce red flowers, comprising ~1% of the entire genus. In this genus there appears to be an intriguing interaction between ploidy and flower color evolution, all red-flowering species are polyploids. I combine phylogenomics, gene sequencing, biochemistry, and trait mapping to answer the following main questions: What is the most likely driver of floral color evolution in Silene - pollinator shifts, sympatric competition, abiotic factors, or polyploidy? Are red flowers transgressive phenotypes? Do all red species use the same pigments to create red? And last, do the existing red species represent independent origins?

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1 - Harvard University, Harvard University Herbaria, 22 Divinity Ave, Cambridge, MA, 02138, United States

floral traits

Presentation Type: Oral Paper
Session: MACROI, Macroevolution I
Location: Virtual/Virtual
Date: Tuesday, July 20th, 2021
Time: 1:00 PM(EDT)
Number: MACROI003
Abstract ID:107
Candidate for Awards:None

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