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Abstract Detail

Genetics Section

Karimi, Nisa [1], Stenz, Noah [1], Scott, Alison [1], Baum, David A. [1].

Phylogenetic Placement of the Whole Genome Duplication in Malvaceae.

The increasing availability of transcriptomic and genomic data has allowed for a greatly improved understanding of the history of whole-genome duplication events and an enhanced ability to distinguish allopolyploidy and autopolyploidy. Here we use transcriptome data to phylogenetically place a polyploidization event previously identified in the ancestry of cotton, Gossypium raimondii. We analyzed transcriptomes from six species representing five major clades (subfamilies) of Malvaceae: G. raimondii (Malvoideae), Theobroma cacao (Byttnerioideae), Tilia cordata (Tilioideae), Dombeya sp. (Dombeyoideae), Pachira sp. (Bombacoideae), and Adansonia digitata (Bombacoideae). Using pairwise Ks plots and analyses of gene trees, we found the same whole genome duplication event in multiple species, but not in the Theobroma or Tilia genomes. This locates the duplication in the Malvadendrina clade (which includes all sampled taxa except Theobroma), sometime after its divergence from Byttneriina. The result also supports a clade within Malvadendrina that includes Gossypium, Pachira, and Adansonia (and perhaps Dombeya, whose analysis is still underway), but not Tilia. Further analyses are needed to locate the internode within Malvadendrina on which whole genome duplication occurred. Additionally, these data will help clarify the origins of tetraploidy in A. digitata.

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1 - University of Wisconsin - Madison, Department of Botany, 430 Lincoln Drive, Madison, WI, 53706, USA

whole genome duplication

Presentation Type: Poster:Posters for Sections
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PGN011
Abstract ID:650
Candidate for Awards:None

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