Assessing resistance levels of potato cultivars in South Africa against Alternaria alternata

IF 1.1 Q3 AGRONOMY

South African Journal of Plant and Soil Pub Date : 2022-01-01 DOI:10.1080/02571862.2021.1970831

Avhurengwi Shirley Mathelemuse, K. Yobo, M. Truter, P. Steyn, M. Kena, R. Sutherland

{"title":"Assessing resistance levels of potato cultivars in South Africa against Alternaria alternata","authors":"Avhurengwi Shirley Mathelemuse, K. Yobo, M. Truter, P. Steyn, M. Kena, R. Sutherland","doi":"10.1080/02571862.2021.1970831","DOIUrl":null,"url":null,"abstract":"Brown leaf spot caused by Alternaria alternata (Fries) Keissler is one of the most devastating fungal diseases of potato. Management of this disease relies mostly on fungicide applications. However, fungicides are becoming less effective due to the development of fungal resistance to specific chemicals. Additionally, there is limited information on resistance in potato cultivars in South Africa against brown leaf spot. This study aims to evaluate ten commercial potato cultivars for brown leaf spot resistance using detached leaf, tuber and whole plant screening techniques under controlled conditions. The experiment was conducted in 2016 and repeated in 2017. The whole plant assay showed that Labadia, Almera, Sifra, Mondeo, Up-To-Date and Lanorma are resistant to brown spot. Resistance levels in Labadia, Almera, Sifra and Up-To-Date were consistent in the 2016 and 2017 experiments. The detached leaf assay showed Almera, Sifra, Up-To-Date and Mondeo as moderately resistant, while Innovator, Mondial and Markies were moderately susceptible. However, in the tuber assay all cultivars were highly susceptible. Cultivar resistance varied based on the screening technique used, although results suggest that the detached leaf and whole plant assays could be used in potato disease screening programs.","PeriodicalId":21920,"journal":{"name":"South African Journal of Plant and Soil","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"South African Journal of Plant and Soil","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/02571862.2021.1970831","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"AGRONOMY","Score":null,"Total":0}

引用次数: 0

Abstract

Brown leaf spot caused by Alternaria alternata (Fries) Keissler is one of the most devastating fungal diseases of potato. Management of this disease relies mostly on fungicide applications. However, fungicides are becoming less effective due to the development of fungal resistance to specific chemicals. Additionally, there is limited information on resistance in potato cultivars in South Africa against brown leaf spot. This study aims to evaluate ten commercial potato cultivars for brown leaf spot resistance using detached leaf, tuber and whole plant screening techniques under controlled conditions. The experiment was conducted in 2016 and repeated in 2017. The whole plant assay showed that Labadia, Almera, Sifra, Mondeo, Up-To-Date and Lanorma are resistant to brown spot. Resistance levels in Labadia, Almera, Sifra and Up-To-Date were consistent in the 2016 and 2017 experiments. The detached leaf assay showed Almera, Sifra, Up-To-Date and Mondeo as moderately resistant, while Innovator, Mondial and Markies were moderately susceptible. However, in the tuber assay all cultivars were highly susceptible. Cultivar resistance varied based on the screening technique used, although results suggest that the detached leaf and whole plant assays could be used in potato disease screening programs.

查看原文本刊更多论文

评估南非马铃薯品种对互花疫病的抗性水平

马铃薯褐叶斑病是马铃薯最具破坏性的真菌病害之一。这种疾病的管理主要依靠杀菌剂的应用。然而，由于真菌对特定化学物质的耐药性的发展，杀菌剂正变得不那么有效。此外，关于南非马铃薯品种抗褐叶斑病的信息有限。在控制条件下，采用离体叶片、块茎和全株筛选技术对10个马铃薯商品品种的抗褐叶斑病能力进行了评价。该实验于2016年进行，并于2017年重复。全株试验结果表明，Labadia、Almera、Sifra、Mondeo、up - up和Lanorma对褐斑病具有抗性。Labadia、Almera、Sifra和updated的抗性水平在2016年和2017年的实验中是一致的。离体叶片试验显示Almera、Sifra、cut - up和Mondeo中度抗性，Innovator、Mondial和Markies中度敏感。然而，在块茎试验中，所有品种都高度敏感。不同筛选技术的不同，品种的抗性也不同，但结果表明，离体叶片和整株测定法可用于马铃薯病害筛选。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

South African Journal of Plant and Soil Agricultural and Biological Sciences-Plant Science

CiteScore

1.90

自引率

11.10%

发文量

期刊介绍： The Journal has a proud history of publishing quality papers in the fields of applied plant and soil sciences and has, since its inception, recorded a vast body of scientific information with particular reference to South Africa.