Campus Units

Agronomy

Document Type

Article

Publication Version

Published Version

Publication Date

9-2011

Journal or Book Title

The Plant Cell

Volume

23

Issue

9

First Page

3129

Last Page

3136

DOI

10.​1105/​tpc.​111.​089573

Abstract

With the advent of high-throughput sequencing, the availability of genomic sequence for comparative genomics is increasing exponentially. Numerous completed plant genome sequences enable characterization of patterns of the retention and evolution of genes within gene families due to multiple polyploidy events, gene loss and fractionation, and differential evolutionary pressures over time and across different gene families. In this report, we trace the changes that have occurred in 12 surviving homoeologous genomic regions from three rounds of polyploidy that contributed to the current Glycine max genome: a genome triplication before the origin of the rosids (;130 to 240 million years ago), a genome duplication early in the legumes (;58 million years ago), and a duplication in the Glycine lineage (;13 million years ago). Patterns of gene retention following the genome triplication event generally support predictions of the Gene Balance Hypothesis. Finally, we find that genes in networks with a high level of connectivity are more strongly conserved than those with low connectivity and that the enrichment of these highly connected genes in the 12 highly conserved homoeologous segments may in part explain their retention over more than 100 million years and repeated polyploidy events.

Comments

This article is from The Plant Cell 23 (2011): 3129–3136, doi:10.1105/tpc.111.089573.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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