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Genetic, morphological and pathogenic diversity in the canker pathogen Cryptodiaporthe melanocraspeda on Banksia

Genetic, morphological and pathogenic diversity in the canker pathogen Cryptodiaporthe... Diversity within and between Cryptodiaporthe melanocraspeda populations on Banksia spp. and variation in susceptibility within B. coccinea that resulted from pathogen-induced selection, was investigated. Genetic distances between C. melanocraspeda isolate populations were much less than those between Cryptodiaporthe spp. Spore size and rates of lesion extension of isolate populations of C. melanocraspeda formed continua that reflected intraspecific variation within a species. There were two isozyme groups amongst the populations of C. melanocraspeda from different Banksia hosts. Populations of C. melanocraspeda from the five geographic clusters could be divided into three geographic isozyme groups. Pycnidiospore size of populations of C. melanocraspeda isolates from different Banksia hosts formed a continuum from relatively short-thin spores for isolates from B. sessilis and relatively long-wide spores for isolates from B. baxteri. The rate of lesion extension formed a continuum, with ranking of isolates from slowest to fastest rates differing on the four hosts inoculated. Isolate populations varied in their pattern of adaptation to local Banksia host populations. Although intraspecific variation in the response of B. coccinea to C. melanocraspeda was mainly skewed to highly susceptible trees, there would be the potential for the conservation of diversity through single-tree selection for resistance and breeding. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australasian Plant Pathology Springer Journals

Genetic, morphological and pathogenic diversity in the canker pathogen Cryptodiaporthe melanocraspeda on Banksia

Australasian Plant Pathology , Volume 44 (3) – Feb 26, 2015

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References (49)

Publisher
Springer Journals
Copyright
Copyright © 2015 by Australasian Plant Pathology Society Inc.
Subject
Life Sciences; Plant Pathology; Plant Sciences; Agriculture; Entomology; Ecology
ISSN
0815-3191
eISSN
1448-6032
DOI
10.1007/s13313-015-0346-7
Publisher site
See Article on Publisher Site

Abstract

Diversity within and between Cryptodiaporthe melanocraspeda populations on Banksia spp. and variation in susceptibility within B. coccinea that resulted from pathogen-induced selection, was investigated. Genetic distances between C. melanocraspeda isolate populations were much less than those between Cryptodiaporthe spp. Spore size and rates of lesion extension of isolate populations of C. melanocraspeda formed continua that reflected intraspecific variation within a species. There were two isozyme groups amongst the populations of C. melanocraspeda from different Banksia hosts. Populations of C. melanocraspeda from the five geographic clusters could be divided into three geographic isozyme groups. Pycnidiospore size of populations of C. melanocraspeda isolates from different Banksia hosts formed a continuum from relatively short-thin spores for isolates from B. sessilis and relatively long-wide spores for isolates from B. baxteri. The rate of lesion extension formed a continuum, with ranking of isolates from slowest to fastest rates differing on the four hosts inoculated. Isolate populations varied in their pattern of adaptation to local Banksia host populations. Although intraspecific variation in the response of B. coccinea to C. melanocraspeda was mainly skewed to highly susceptible trees, there would be the potential for the conservation of diversity through single-tree selection for resistance and breeding.

Journal

Australasian Plant PathologySpringer Journals

Published: Feb 26, 2015

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