Genomics of the expanding pine pathogen Lecanosticta acicola reveals patterns of ongoing genetic admixture.

Autor:	Marcet-Houben M; Barcelona Supercomputing Centre (BSC-CNS), Barcelona, Spain.; Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Barcelona, Spain.; Centro de Investigación Biomédica En Red de Enfermedades Infecciosas (CIBERINFEC), Barcelona, Spain., Cruz F; CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain., Gómez-Garrido J; CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain., Alioto TS; CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain.; Universitat Pompeu Fabra (UPF), Barcelona, Spain., Nunez-Rodriguez JC; Barcelona Supercomputing Centre (BSC-CNS), Barcelona, Spain.; Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Barcelona, Spain., Mesanza N; Instituto Vasco de Investigación y Desarrollo Agrario (BRTA), Arkaute, Araba, Spain., Gut M; CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain.; Universitat Pompeu Fabra (UPF), Barcelona, Spain., Iturritxa E; Instituto Vasco de Investigación y Desarrollo Agrario (BRTA), Arkaute, Araba, Spain., Gabaldon T; Barcelona Supercomputing Centre (BSC-CNS), Barcelona, Spain.; Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Barcelona, Spain.; Centro de Investigación Biomédica En Red de Enfermedades Infecciosas (CIBERINFEC), Barcelona, Spain.; Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain.
Jazyk:	angličtina
Zdroj:	MSystems [mSystems] 2024 Mar 19; Vol. 9 (3), pp. e0092823. Date of Electronic Publication: 2024 Feb 16.
DOI:	10.1128/msystems.00928-23
Abstrakt:	Lecanosticta acicola is the causal agent for brown spot needle blight that affects pine trees across the northern hemisphere. Based on marker genes and microsatellite data, two distinct lineages have been identified that were introduced into Europe on two separate occasions. Despite their overall distinct geographic distribution, they have been found to coexist in regions of northern Spain and France. Here, we present the first genome-wide study of Lecanosticta acicola , including assembly of the reference genome and a population genomics analysis of 70 natural isolates from northern Spain. We show that most of the isolates belong to the southern lineage but show signs of introgression with northern lineage isolates, indicating mating between the two lineages. We also identify phenotypic differences between the two lineages based on the activity profiles of 20 enzymes, with introgressed strains being more phenotypically similar to members of the southern lineage. In conclusion, we show undergoing genetic admixture between the two main lineages of L. acicola in a region of recent expansion. Importance: Lecanosticta acicola is a fungal pathogen causing severe defoliation, growth reduction, and even death in more than 70 conifer species. Despite the increasing incidence of this species, little is known about its population dynamics. Two divergent lineages have been described that have now been found together in regions of France and Spain, but it is unknown how these mixed populations evolve. Here we present the first reference genome for this important plant pathogenic fungi and use it to study the population genomics of 70 isolates from an affected forest in the north of Spain. We find signs of introgression between the two main lineages, indicating that active mating is occurring in this region which could propitiate the appearance of novel traits in this species. We also study the phenotypic differences across this population based on enzymatic activities on 20 compounds. Competing Interests: The authors declare no conflict of interest.
Databáze:	MEDLINE
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