Abstract Detail

Molecular Ecology and Evolution

Edger, Patrick [1], Smith, Ron [2], Vallejo-Marin, mario [3], Cooley, Arielle [4], Platts, Adrian [5], Childs, Kevin [6], Pires, J. Chris [7], Smith, Greg [8], Puzey, Joshua [9].

Genomic consequences of hybridization and allopolyploidization in British monkeyflower.

Here we use allopolyploid species in the Mimulus genus (including a 140-generation-old neo-allopolyploid), as models to understand how genome structure, specifically transposon class and local transposon density, explain homeolog specific expression differences. Young allopolyploid lineages face the unique challenge of organizing two genomes, contributed by different parent species, evolved in separate contexts, now forced to share a most intimate environment – a nucleus. In the wake of allopolyploidy, homeologous genes (homologous genes derived from different parental subgenomes) are often expressed at non-equal levels. Typically, genome-wide patterns of homeolog expression bias are highly skewed – one parental genome (subgenome) is expressed at higher levels than the other. It is unknown how homeologs become biased over another. More broadly, it is also unknown how one subgenome becomes biasedly expressed as a whole over the other subgenome. A mechanistic understanding of these phenomena is fundamental to understanding allopolyploid gene expression, subgenome fractionation, and allopolyploid evolution.

1 - University Of Missouri - Columbia, 401 Amanda Dr, Ashland, MO, 65010, USA
2 - College of William and Mary, Williamsburg, VA
3 - University of Stirling, Scotland
4 - Whitman College, Walla Walla, WA
5 - McGill University
6 - Michigan State University
7 - University of Missouri
8 - College of William and Mary, Applied Science
9 - College of William and Mary, Biology, 540 Landrum Dr., Williamsburg, VA, 23185, USA

Keywords:
Population Genomics
allopolyploid
hybridization
Transposon
Comparative Genomics.

Presentation Type: Oral Paper:Papers for Topics
Session: 61
Location: Salon 15/16/The Shaw Conference Centre
Date: Wednesday, July 29th, 2015
Time: 11:15 AM
Number: 61013
Abstract ID:1097
Candidate for Awards:Margaret Menzel Award