Abstract Detail

Phylogenomics

Wickett, Norman [1], Johnson , Matthew G [2], Shaw, Jonathan [3], Goffinet, Bernard [4].

Reconstructing gene family evolution in bryophytes: diversification, duplication, and horizontal transfer.

Genomic resources in bryophytes have been largely limited to the model moss Physcomitrella patens. While the resources for this species are extensive, a broader sampling of taxa is necessary to infer more general patterns of gene, gene family, and genome evolution in mosses, liverworts, and hornworts. In particular, gene family circumscriptions that rely on the presence of at least two species will fail to include bryophyte-specific gene families. Furthermore, the loss of gene families in P. patens may lead to incorrect interpretations of the origin of land plant-specific gene families. Recent and ongoing projects, including the 1000 plants (oneKP or 1KP) initiative and the Pleurocarp Tree of Life project, among others, have generated new resources (transcriptomic and/or genomic) for additional bryophytes. These data have allowed us to circumscribe gene families for a diverse set of early land plants, with the objective of reconstructing patterns of genome evolution in these plants. Here, we describe our efforts to 1) characterize lineage-specific gene families in bryophytes, 2) place these gene families in the context of whole genome duplication events, 3) more accurately place previously identified horizontal gene transfers (HGTs) in a phylogenetic context, and 4) identify possible additional HGTs in bryophytes.

1 - Chicago Botanic Garden, 1000 Lake Cook Rd., Apt 2, Glencoe, IL, 60022, USA
2 - Chicago Botanic Garden, Plant Sciences, 1000 Lake Cook Road, Glencoe, IL, 60022, USA
3 - 130 Science Drive, Box 90338, Durham, NC, 27708, USA, 919/660-7344
4 - University Of Connecticut, Department Of Ecology & Evolutionary Biology, 75 N. Eagleville Road, U-3043, STORRS, CT, 06269-3043, USA

Keywords:
bryophytes
genomics
Transcriptome
1KP
gene family evolution
RNA Seq
horizontal gene transfer
whole genome duplication
genome sequencing
next generation sequencing.

Presentation Type: Oral Paper:Papers for Topics
Session: 43
Location: Evergreen/Grove
Date: Wednesday, July 30th, 2014
Time: 2:30 PM
Number: 43005
Abstract ID:622
Candidate for Awards:Margaret Menzel Award