Picea phylogenomics

Dnr:

SNIC 2015/6-67

Type:

SNAC Small

Principal Investigator:

Alexis Sullivan

Affiliation:

UmeƄ universitet

Start Date:

2015-04-16

End Date:

2017-11-01

Primary Classification:

10607: Botanik

Webpage:

Allocation

Abstract

Detailed evolutionary studies of Picea are presently hindered by the lack of a reliable phylogeny. While relationships inferred from chloroplast sequences support a North American origin of spruce, mitochondrial data place the ancestor of all living spruces on the Qinghai-Tibetan Plateau. Mitochondrial trees indicate close relationships among geographically proximate species, but the paternally-inherited chloroplast phylogeny intercalates Asian and western North American clades. Together, these phylogenies implicate long-distance, pollen-mediated hybridization as a powerful force in shaping the evolution of Picea. However, high statistical support for this scenario is lacking primarily due to the historic difficulty of acquiring DNA sequences. Now armed with next-generation sequencing technology and the P. abies reference genome, our goal is to reconstruct the evolutionary relationships and processes within Picea using phylogenetic trees informed by all three (chloroplast, mitochondrion, and nuclear) genomes.