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Genetic diversity of Colletotrichum lupini and its virulence on white and Andean lupin

Alkemade, J. A.; Messmer, M. M.; Voegele, R. T.; Finckh, M. R. and Hohmann, P. (2021) Genetic diversity of Colletotrichum lupini and its virulence on white and Andean lupin. Scientific reports, 11, p. 13547.

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Document available online at: https://www.nature.com/articles/s41598-021-92953-y


Summary

Lupin cultivation worldwide is threatened by anthracnose, a destructive disease caused by the seed- and air-borne fungal pathogen Colletotrichum lupini. In this study we explored the intraspecific diversity of 39 C. lupini isolates collected from different lupin cultivating regions around the world, and representative isolates were screened for their pathogenicity and virulence on white and Andean lupin. Multi-locus phylogeny and morphological characterizations showed intraspecific diversity to be greater than previously shown, distinguishing a total of six genetic groups and ten distinct morphotypes. Highest diversity was found across South America, indicating it as the center of origin of C. lupini. The isolates that correspond to the current pandemic belong to a genetic and morphological uniform group, were globally widespread, and showed high virulence on tested white and Andean lupin accessions. Isolates belonging to the other five genetic groups were mostly found locally and showed distinct virulence patterns. Two highly virulent strains were shown to overcome resistance of advanced white lupin breeding material. This stresses the need to be careful with international seed transports in order to prevent spread of currently confined but potentially highly virulent strains. This study improves our understanding of the diversity, phylogeography and pathogenicity of a member of one of the world’s top 10 plant pathogen genera, providing valuable information for breeding programs and future disease management.


EPrint Type:Journal paper
Keywords:lupin. legumes, anthracnode, genetic diversity, colletotrichum lupini
Agrovoc keywords:
Language
Value
URI
English
Lupinus
http://aims.fao.org/aos/agrovoc/c_4463
English
Colletotrichum
http://aims.fao.org/aos/agrovoc/c_1761
English
genetic differences -> genetic variation
http://aims.fao.org/aos/agrovoc/c_15975
Subjects: Crop husbandry > Production systems > Cereals, pulses and oilseeds
Crop husbandry > Breeding, genetics and propagation
Crop husbandry > Crop health, quality, protection
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Crop protection
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Seeds and breeding > Plant breeding
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Arable crops > Legumes
DOI:10.1038/s41598-021-92953-y
Deposited By: Forschungsinstitut für biologischen Landbau, FiBL
ID Code:40138
Deposited On:30 Jun 2021 07:04
Last Modified:30 Jun 2021 07:04
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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