Person: Hovmoller, M.S.
Loading...
Email Address
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
Hovmoller
First Name
M.S.
Name
Hovmoller, M.S.
ORCID ID
0000-0002-4432-8898 14 results
Search Results
Now showing 1 - 10 of 14
- First Report of Ug99 Wheat Stem Rust Caused by Puccinia graminis f. sp. tritici in South Asia(American Phytopathological Society, 2024) Patpour, M.; Baidya, S.; Basnet, R.; Justesen, A.F.; Hodson, D.P.; Thapa, D.B.; Hovmoller, M.S.
Publication - Distribution of Puccinia striiformis f. sp. tritici races and virulence in wheat growing regions of Kenya from 1970 to 2014(American Phytopathological Society, 2022) Wamalwa, M.; Wanyera, R.; Rodriguez-Algaba, J.; Boyd, L.; Owuoche, J.O.; Ogendo, j.; Bhavani, S.; Uauy, C.; Justesen, A.F.; Hovmoller, M.S.
Publication - Wheat rust early warning prevents yellow rust epidemic in Ethiopian wheat fields(CIMMYT, 2022) Hodson, D.P.; Acevedo, M.; Alemayehu, Y.; Nigussie, B.; Salato, Z.; Guta, K.; Gemechu, A.; Negash, T.; Mideksa, T.; Gebeyehu, T.; Hailemariam, H.; Yohannes, M.; Smith, J.W.; Hansen, J.; Thach, T.; Thurston, W.; Mona, T.; Millington, S.; Hovmoller, M.S.; Gilligan, C.A.
Publication - Stem rust in Western Siberia – race composition and effective resistance genes(Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences, 2020) Shamanin, V.; Pototskaya, I.V.; Shepelev, S.; Pozherukova, V.E.; Salina, E.A.; Skolotneva, E.S.; Hodson, D.P.; Hovmoller, M.S.; Patpour, M.; Morgounov, A.
Publication - First report of virulence to Sr25 in race TKTTF of Puccinia graminis f. sp. tritici causing stem rust on wheat(American Phytopathological Society (APS), 2017) Patpour, M.; Hovmoller, M.S.; Hodson, D.P.Puccinia graminis f. sp. tritici (Pgt) race TKTTF was reported as the dominant race in the wheat stem rust epidemics in Ethiopia during 2014–15. The race and variants hereof have also been recorded elsewhere in Africa, the Middle East, and Europe. Here, we report the presence of additional virulence to Sr25 in the TKTTF population, a resistance gene transferred to several Australian and CIMMYT wheat genotypes.
Publication - MARPLE, a point-of-care, strain-level disease diagnostics and surveillance tool for complex fungal pathogens(BioMed Central, 2019) Radhakrishnan, G.V.; Cook, N.M.; Bueno Sancho, V.; Lewis, C. M.; Persoons, A.; Debebe, A.; Heaton, M.; Davey, P.E.; Abeyo Bekele Geleta; Alemayehu, Y.; Badebo, A.; Barnett, M.; Bryant, R.; Chatelain, J.; Xianming Chen; Suomeng Dong; Henriksson, T.; Holdgate, S.; Justesen, A.F.; Kalous, J.; Zhensheng Kang; Laczny, S.; Legoff, J.P.; Lesch, D.; Richards, T.; Randhawa, H.S.; Thach, T.; Meinan Wang; Hovmoller, M.S.; Hodson, D.P.; Saunders, D.G.O.Background: Effective disease management depends on timely and accurate diagnosis to guide control measures. The capacity to distinguish between individuals in a pathogen population with specific properties such as fungicide resistance, toxin production and virulence profiles is often essential to inform disease management approaches. The genomics revolution has led to technologies that can rapidly produce high-resolution genotypic information to define individual variants of a pathogen species. However, their application to complex fungal pathogens has remained limited due to the frequent inability to culture these pathogens in the absence of their host and their large genome sizes. Results: Here, we describe the development of Mobile And Real-time PLant disEase (MARPLE) diagnostics, a portable, genomics-based, point-of-care approach specifically tailored to identify individual strains of complex fungal plant pathogens. We used targeted sequencing to overcome limitations associated with the size of fungal genomes and their often obligately biotrophic nature. Focusing on the wheat yellow rust pathogen, Puccinia striiformis f.sp. tritici (Pst), we demonstrate that our approach can be used to rapidly define individual strains, assign strains to distinct genetic lineages that have been shown to correlate tightly with their virulence profiles and monitor genes of importance. Conclusions: MARPLE diagnostics enables rapid identification of individual pathogen strains and has the potential to monitor those with specific properties such as fungicide resistance directly from field-collected infected plant tissue in situ. Generating results within 48 h of field sampling, this new strategy has far-reaching implications for tracking plant health threats.
Publication - Potential for re-emergence of wheat stem rust in the United Kingdom(Nature Research, 2018) Lewis, C. M.; Persoons, A.; Bebber, D.; Kigathi, R.; Maintz, J.; Findlay, K.; Bueno Sancho, V.; Corredor-Moreno, P.; Harrington, S.A.; Ngonidzashe Kangara; Berlin, A.; Garcia, R.; German, S.E.; Hanzalova, A.; Hodson, D.P.; Hovmoller, M.S.; Huerta-Espino, J.; Imtiaz, M.; Mirza, J.I.; Justesen, A.F.; Niks, R.; Ali Omrani; Patpour, M.; Pretorius, Z.; Ramin Roohparvar; Sela, H.; Singh, R.P.; Steffenson, B.; Visser, B.; Fenwick, P.; Thomas, J.; Wulff, B.B.H.; Saunders, D.G.O.Wheat stem rust, a devastating disease of wheat and barley caused by the fungal pathogen Puccinia graminis f. sp. tritici, was largely eradicated in Western Europe during the mid-to-late twentieth century. However, isolated outbreaks have occurred in recent years. Here we investigate whether a lack of resistance in modern European varieties, increased presence of its alternate host barberry and changes in climatic conditions could be facilitating its resurgence. We report the first wheat stem rust occurrence in the United Kingdom in nearly 60 years, with only 20% of UK wheat varieties resistant to this strain. Climate changes over the past 25 years also suggest increasingly conducive conditions for infection. Furthermore, we document the first occurrence in decades of P. graminis on barberry in the UK . Our data illustrate that wheat stem rust does occur in the UK and, when climatic conditions are conducive, could severely harm wheat and barley production.
Publication - Overview of stem rust epidemics in eastern Africa and races causing the epidemics(USDA, 2016) Hodson, D.P.; Yue Jin; Hovmoller, M.S.
Publication - Yellow Rust epidemics worldwide were caused by Pathogen Races from divergent genetic lineages(Frontiers, 2017) Ali, S.; Rodriguez-Algaba, J.; Thach, T.; Sorensen, C.K; Hansen, J.; Lassen, P.; Nazari, K.; Hodson, D.P.; Justesen, A.F.; Hovmoller, M.S.We investigated whether the recent worldwide epidemics of wheat yellow rust were driven by races of few clonal lineage(s) or populations of divergent races. Race phenotyping of 887 genetically diverse Puccinia striiformis isolates sampled in 35 countries during 2009–2015 revealed that these epidemics were often driven by races from few but highly divergent genetic lineages. PstS1 was predominant in North America; PstS2 in West Asia and North Africa; and both PstS1 and PstS2 in East Africa. PstS4 was prevalent in Northern Europe on triticale; PstS5 and PstS9 were prevalent in Central Asia; whereas PstS6 was prevalent in epidemics in East Africa. PstS7, PstS8 and PstS10 represented three genetic lineages prevalent in Europe. Races from other lineages were in low frequencies. Virulence to Yr9 and Yr27 was common in epidemics in Africa and Asia, while virulence to Yr17 and Yr32 were prevalent in Europe, corresponding to widely deployed resistance genes. The highest diversity was observed in South Asian populations, where frequent recombination has been reported, and no particular race was predominant in this area. The results are discussed in light of the role of invasions in shaping pathogen population across geographical regions. The results emphasized the lack of predictability of emergence of new races with high epidemic potential, which stresses the need for additional investments in population biology and surveillance activities of pathogens on global food crops, and assessments of disease vulnerability of host varieties prior to their deployment at larger scales.
Publication - Kenyan Isolates of Puccinia graminis f. sp. tritici from 2008 to 2014: virulence to SrTmp in the Ug99 race group and implications for breeding programs(American Phytopathological Society (APS), 2016) Newcomb, M.; Olivera Firpo, P.D.; Rouse, M.N.; Szabo, L.J.; Johnson, J.W.; Gale, S.; Luster, D.G.; Wanyera, R.; Macharia, G.; Bhavani, S.; Hodson, D.P.; Patpour, M.; Hovmoller, M.S.; Fetch, T.; Yue JinFrequent emergence of new variants in the Puccinia graminis f. sp. tritici Ug99 race group in Kenya has made pathogen survey a priority. We analyzed 140 isolates from 78 P. graminis f. sp. tritici samples collected in Kenya between 2008 and 2014 and identified six races, including three not detected prior to 2013. Genotypic analysis of 20 isolates from 2013 and 2014 collections showed that the new races TTHST, TTKTK, and TTKTT belong to the Ug99 race group. International advanced breeding lines were evaluated against an isolate of TTKTT (Sr31, Sr24, and SrTmp virulence) at the seedling stage. From 169 advanced lines from Kenya, 23% of lines with resistance to races TTKSK and TTKST were susceptible to TTKTT and, from two North American regional nurseries, 44 and 91% of resistant lines were susceptible. Three lines with combined resistance genes were developed to facilitate pathogen monitoring and race identification. These results indicate the increasing virulence and variability in the Kenyan P. graminis f. sp. tritici population and reveal vulnerabilities of elite germplasm to new races.
Publication