Occurrence and characterization of Puccinia triticina in Zimbabwe

被引：0

作者：

Chiuraise, Nyasha ^{[1
,2
]}

Visser, Botma ^{[2
]}

Mare, Ansori ^{[2
]}

Boshoff, Willem ^{[2
]}

机构：

[1] Seed Co Ltd, Plant Pathol Dept, Rattray Arnold Res Stn, Res & Dev, Harare, Zimbabwe

[2] Univ Free State, Dept Plant Sci, Bloemfontein, South Africa

来源：

CANADIAN JOURNAL OF PLANT PATHOLOGY | 2024年 / 46卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

Leaf rust; microsatellite markers; surveillance; Triticum aestivum; Marqueurs microsatellites; rouille foliaire; LEAF RUST FUNGUS; SEQUENCE REPEAT MARKERS; F-SP TRITICI; WHEAT LEAF; POPULATION-GENETICS; STEM RUST; 1ST REPORT; VIRULENCE; SOFTWARE; RACES;

D O I：

10.1080/07060661.2024.2356192

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Wheat leaf rust caused by Puccinia triticina (Pt) is an important disease of bread wheat in Zimbabwe. This study was carried out to determine the distribution, avirulence/virulence profile(s) and genotypic variation among isolates of the pathogen. In total, 104 single-pustule isolates were established from infected wheat samples that were collected from the main wheat production regions in Zimbabwe in surveys conducted from 2019 to 2021. Phenotyping of the isolates on a set of 46 differential and additional wheat lines revealed a single Pt race, MCDS. For genotypic assessment, 48 Pt isolates, including eight South African races, were genotyped with 19 microsatellite markers. Using the Bayesian model, isolates were subdivided into three clusters in both a DARwin neighbour-joining tree and STRUCTURE analysis. The results confirmed a high genetic similarity between the Zimbabwean Pt isolates and the South African races MCDS, MCPS and MFPS. Furthermore, Pt isolates from Zimbabwe were clonal, which was in accordance with all 104 isolates that typed to race MCDS.

引用

页码：509 / 523

页数：15

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