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Identification of pathotypes of the sorghum rust pathogen, Puccinia purpurea, in Australia

White, J. A. and Ryley, M. J. and George, D. L. and Kong, G. A. (2015) Identification of pathotypes of the sorghum rust pathogen, Puccinia purpurea, in Australia. Australasian Plant Pathology, 44 (1). p. 1. ISSN 0815-3191

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Article Link(s): http://dx.doi.org/10.1007/s13313-014-0318-3

Abstract

This study aimed to determine if pathotypic diversity of the sorghum rust pathogen, P. purpurea, exists in eastern Australia. A differential set of 10 Sorghum bicolor genotypes was used to identify four putative pathotypes from the 28 P. purpurea isolates that were tested. Pathotypes 1 and 3 were the most common, together comprising 85.7 % of the isolates tested, while pathotype 2 comprised 10.7 % of isolates, and pathotype 4 the remainder. Based on the limited number of isolates that were tested, there was evidence of geographic specialization amongst the pathotypes, with pathotype 1 not being found in north Queensland. This work has provided conclusive evidence that pathotypes of P. purpurea exist in the sorghum growing regions of Australia and has resulted in the development of a protocol for identifying pathotypes and screening breeding and experimental lines for resistance to these pathotypes. However, further investigations on the pathotypic diversity of P. purpurea and on the temporal and geographic distribution of these four as well as any additional undiscovered pathotypes are needed.

Item Type:Article
Business groups:Crop and Food Science
Keywords:Differential set Geographic distribution Pathotype frequency S. bicolor S. sudanense S. halepense
Subjects:Science > Botany > Genetics
Plant pests and diseases > Plant pathology
Plant culture > Field crops > Sorghum
Deposited On:25 Mar 2015 01:40
Last Modified:25 Mar 2015 01:40

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