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Detection of Cochliobolus heterostrophus races in South China
Author(s) -
Wang Meng,
Wang Shaoqing,
Ma Jia,
Yu Chuanjin,
Gao Jinxin,
Chen Jie
Publication year - 2017
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/jph.12607
Subject(s) - race (biology) , biology , virulence , phylogenetic tree , amplified fragment length polymorphism , blight , upgma , population , veterinary medicine , genetics , genetic diversity , botany , gene , genotype , demography , medicine , sociology
Cochliobolus heterostrophus is the causal pathogen of the southern corn leaf blight ( SCLB ). There are three known races: race O, race C and race T. To determine which C . heterostrophus races comprise the field population in southern China and to assess diversity of these strains in terms of virulence, 200 isolates from diseased plants were collected in nine provinces/municipalities. All were race O, that is, no race T or race C isolates were found. Sixty race O isolates that sporulated well were chosen for further analysis. Virulence was measured using the integral optical density ( IOD ) of leaf lesions on four maize inbred lines. UPGMA cluster analysis of AFLP markers was applied to the 60 race O isolates plus control race O, T and C strains. Phylogenetic distribution, geographic location and virulence were not correlated. These results can provide valuable information for guidance in early warning and disease control.