Host jumps shaped the diversity of extant rust fungi (Pucciniales)

McTaggart, Alistair R. and Shivas, Roger G. and van der Nest, Magriet A. and Roux, Jolanda and Wingfield, Brenda D. and Wingfield, Michael J. (2015) Host jumps shaped the diversity of extant rust fungi (Pucciniales). New Phytologist, 209 (3). pp. 1149-1158. ISSN 0028-646X

Abstract

•The aim of this study was to determine the evolutionary time line for rust fungi and date key speciation events using a molecular clock. Evidence is provided that supports a contemporary view for a recent origin of rust fungi, with a common ancestor on a flowering plant.
•Divergence times for > 20 genera of rust fungi were studied with Bayesian evolutionary analyses. A relaxed molecular clock was applied to ribosomal and mitochondrial genes, calibrated against estimated divergence times for the hosts of rust fungi, such as Acacia (Fabaceae), angiosperms and the cupressophytes.
•Results showed that rust fungi shared a most recent common ancestor with a mean age between 113 and 115 million yr. This dates rust fungi to the Cretaceous period, which is much younger than previous estimations. Host jumps, whether taxonomically large or between host genera in the same family, most probably shaped the diversity of rust genera. Likewise, species diversified by host shifts (through coevolution) or via subsequent host jumps. This is in contrast to strict coevolution with their hosts.
•Puccinia psidii was recovered in Sphaerophragmiaceae, a family distinct from Raveneliaceae, which were regarded as confamilial in previous studies.


Statistics for USQ ePrint 32432
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 25 May 2017 23:35
Last Modified: 01 Jun 2017 02:59
Uncontrolled Keywords: Puccinia psidii, rust fungi, Bayesian evolutionary analyses, divergence
Fields of Research : 06 Biological Sciences > 0607 Plant Biology > 060704 Plant Pathology
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970106 Expanding Knowledge in the Biological Sciences
Identification Number or DOI: 10.1111/nph.13686
URI: http://eprints.usq.edu.au/id/eprint/32432

Actions (login required)

View Item Archive Repository Staff Only