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ToolsMurithi, Harun M., Soares, Rafael M., Mahuku, George, van Esse, H. Peter and Joosten, Matthieu H.A.J. (2021) Diversity and distribution of pathotypes of the soybean rust fungus Phakopsora pachyrhizi in East Africa. Plant Pathology, 70 (3). pp. 655-666. ISSN 0032-0862
Full text not available from this repository. (Request a copy)Abstract
Phakopsora pachyrhizi is a biotrophic fungus that causes rust on soybean, leading to devastating yield losses. Development of resistant cultivars for deployment in different geographic regions requires a comprehensive understanding of the prevalent P. pachyrhizi pathotypes. To determine the pathotypes existing in four East African countries, 65 isolates were tested on 11 soybean host differentials. In addition, the virulence spectrum of isolates collected from the same region over multiple years was compared. The majority of the isolates (54%) belonged to pathotype 1000, which was found in all countries. The pathotypes with the most complex virulence spectrum, which comprised isolates from Kenya and Malawi, were virulent on four differentials. All pathotypes were virulent on soybean genotypes carrying the Rpp1 resistance gene to P. pachyrhizi, but they were avirulent on cultivars carrying the Rpp1b, Rpp2, or Rpp3 gene, as well as on cultivar No6-12-1 that carries Rpp2, Rpp4, and Rpp5. Two of the pathotypes were virulent on cultivar UG 5 that carries Rpp1 and Rpp3 and on Hyuuga that carries Rpp3 and Rpp5. The isolates collected from different countries differed in their virulence spectrum across the years. Shannon's index (H) and Simpson's index (S) of diversity indicated that the isolates from Malawi were more diverse (H = 1.55, S = 0.90) while those from Uganda had lower diversity (H = 0.78, S = 0.46). The Rpp genes that were found to provide resistance to all pathotypes of P. pachyrhizi can be employed for soybean breeding aimed at durable rust resistance.
| Item Type: | Article |
|---|---|
| Additional Information: | Funding Information: Wycliffe Waswa (IITA‐Kenya), Dr Phinehas Tukamuhabwa (Makerere University), Serapia Mhanje (CARITAS‐Tanzania), and Edwin Chatama (IITA‐Malawi) helped with logistic support during field surveys. Mary Njala (IITA‐Tanzania) provided technical skills during field and laboratory work. Some of the soybean host differentials were provided by Dr Yamanaka (JIRCAS). This research was funded by the International Institute of Tropical Agriculture (IITA), by a Lukas Brader Scholarship Award, and the 2Blades Foundation at The Sainsbury Laboratory, Norwich, UK. Funding Information: Wycliffe Waswa (IITA-Kenya), Dr Phinehas Tukamuhabwa (Makerere University), Serapia Mhanje (CARITAS-Tanzania), and Edwin Chatama (IITA-Malawi) helped with logistic support during field surveys. Mary Njala (IITA-Tanzania) provided technical skills during field and laboratory work. Some of the soybean host differentials were provided by Dr Yamanaka (JIRCAS). This research was funded by the International Institute of Tropical Agriculture (IITA), by a Lukas Brader Scholarship Award, and the 2Blades Foundation at The Sainsbury Laboratory, Norwich, UK. Publisher Copyright: © 2020 British Society for Plant Pathology |
| Uncontrolled Keywords: | pathotype,phakopsora pachyrhizi,rpp gene,soybean rust,virulence diversity,agronomy and crop science,genetics,plant science,horticulture ,/dk/atira/pure/subjectarea/asjc/1100/1102 |
| Faculty \ School: | Faculty of Science > School of Biological Sciences Faculty of Science > The Sainsbury Laboratory |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 01 Nov 2024 17:30 |
| Last Modified: | 05 Nov 2024 10:30 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/97440 |
| DOI: | 10.1111/ppa.13324 |
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