Percorrer por autor "Van Poucke, Kris"
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- Preserving the biologically coherent generic concept of , "plant destroyer".Publication . Brasier, Clive M.; Grünwald, Niklaus J.; Bourret, Tyler B.; Govers, Francine; Scanu, Bruno; Cooke, David E. L.; Bose, Tanay; Hawksworth, David L.; Abad, Z Gloria; Albarracin, M. Victoria; Alsultan, Wael; Altamirano-Junqueira, Astrid E; Arifin, Arild R.; Arnet, Matthew J.; Aumentado, Herbert Dustin R.; Bakonyi, József; Belisle, Wei H.; Benigno, Alessandra; Bienapfl, John C.; Bilodeau, Guillaume J; Blair, Jaime E.; Botella, Leticia; Brandano, Andrea; Cacciola, Santa Olga; Carbone, Ignazio; Castroagudin, Vanina L.; Chaendaekattu, Narayanan; Consford, Jonathan D.; Corcobado, Tamara; Covey, Paul A.; Daniels, Hazel A.; Deidda, Antonio; Dorrance, Anne E.; Dort, Erika N.; Drenth, André; Drizou, Fryni; Evangelisti, Edouard; Fajardo, Sebastian N.; Fang, Yufeng; Ference, Christopher M.; Frankel, Susan J.; Goss, Erica M.; Guest, David I.; Hardy, Giles E. S. J.; Harris, Anna R. H.; Hawku, Mehari Desta; Heungens, Kurt; Hong, Chuanxue; Horner, Ian J.; Jung, Marília Horta; Iyanda, Olumayowa J.; Jamieson, Brittney-Aidan; Jeffers, Steven N.; Judelson, Howard S.; Junaid, Muhammad; Kalogeropoulou, Eleni; Kamoun, Sophien; Kang, Seogchan; Kasuga, Takao; Kudláček, Tomáš; LeBoldus, Jared; Lee, Christopher A.; Li, DeWei; Llanos, Alejandro K.; Lopez-Nicora, Horacio D.; Machado, Helena; di San Lio, Gaetano Magnano; Maia, Cristiana; Mandal, Kajal; Manosalva, Patricia; Martin, Frank N.; Matson, Michael E H; McDougal, Rebecca L.; McDowell, John M.; Michelmore, Richard W.; Milenković, Ivan; Moricca, Salvatore; Mostowfizadeh-Ghalamfarsa, Reza; Nagy, Zoltán Á.; Nikolaeva, Ekaterina V.; Ortega-López, Paula; Paap, Trudy; Parada-Rojas, Camilo H.; Hand, Francesca Peduto; Pérez-Sierra, Ana; Pettersson, Martin; Prasad, Pramod; Puig, Alina S.; Raco, Milica; Rajput, Nasir A.; Ristaino, Jean B.; Rooney-Latham, Suzanne; Seidl, Michael F.; Shamoun, Simon F.; Solla, Alejandro; Spies, Christoffel F. J.; Sudermann, Martha A.; Swiecki, Tedmund J.; Tian, Miaoying; Tripathy, Sucheta; Uematsu, Seiji; Van Poucke, Kris; Vichou, Aikaterini E.; Walter, Monika; Webber, Joan F.; Williams, Nari M.; Wingfield, Michael J.; Yadav, Dhananjay; Yang, Xiao; Jung, ThomasPhytophthora is a long-established, well-known, and globally important genus of plant pathogens. Phylogenetic evidence has shown that the biologically distinct, obligate biotrophic downy mildews evolved from Phytophthora at least twice. Because, cladistically, this renders Phytophthora “paraphyletic,” it has been proposed that Phytophthora evolutionary clades be split into multiple genera (Crous et al. 2021; Runge et al. 2011; Thines 2023, 2024). In this letter, we review arguments for the retention of the generic name Phytophthora with a broad circumscription made by Brasier et al. (2022) and by many delegates at an open workshop organized by The American Phytopathological Society. We present our well-considered responses to the genus splitting proposals, both in general terms and in terms of the specific proposals for new genera, alongside new information regarding the biological properties and mode of origin of the Phytophthora clades. We consider that the proposals are mostly non-rigorous and not supported by the scientific evidence. Further, given (i) the apparent lack of any distinguishing biological characteristics (synapomorphies) between the Phytophthora clades; (ii) the fundamental monophyly of Phytophthora in the original Haeckelian sense (Haeckel 1877); (iii) the fact that paraphyly is not a justification for taxonomic splitting; and (iv) the considerable likely damage to effective scientific communication and disease management from an unnecessary breakup of the genus, we report that workshop delegates voted unanimously in favor of preserving the current generic concept and for seeking endorsement of this view by a working group of the International Commission on the Taxonomy of Fungi.
- Unravelling hybridization in Phytophthora using phylogenomics and genome size estimationPublication . Van Poucke, Kris; Haegeman, Annelies; Goedefroit, Thomas; Focquet, Fran; Leus, Leen; Horta Jung, Marília; Nave, Corina; Redondo, Miguel A.; Husson, Claude; Kostov, Kaloyan; Lyubenova, Aneta; Christova, Petya; Chandelier, Anne; Slavov, Slavcho; de Cock, Arthur; Bonants, Peter; Werres, Sabine; Palau, Jonàs O.; Marçais, Benoit; Jung, Thomas; Stenlid, Jan; Ruttink, Tom; Heungens, KurtThe genus Phytophthora comprises many economically and ecologically important plant pathogens. Hybrid species have previously been identified in at least six of the 12 phylogenetic clades. These hybrids can potentially infect a wider host range and display enhanced vigour compared to their progenitors. Phytophthora hybrids therefore pose a serious threat to agriculture as well as to natural ecosystems. Early and correct identification of hybrids is therefore essential for adequate plant protection but this is hampered by the limitations of morphological and traditional molecular methods. Identification of hybrids is also important in evolutionary studies as the positioning of hybrids in a phylogenetic tree can lead to suboptimal topologies. To improve the identification of hybrids we have combined genotyping-by-sequencing (GBS) and genome size estimation on a genus-wide collection of 614 Phytophthora isolates. Analyses based on locus- and allele counts and especially on the combination of species-specific loci and genome size estimations allowed us to confirm and characterize 27 previously described hybrid species and discover 16 new hybrid species. Our method was also valuable for species identification at an unprecedented resolution and further allowed correct naming of misidentified isolates. We used both a concatenation- and a coalescent-based phylogenomic method to construct a reliable phylogeny using the GBS data of 140 non-hybrid Phytophthora isolates. Hybrid species were subsequently connected to their progenitors in this phylogenetic tree. In this study we demonstrate the application of two validated techniques (GBS and flow cytometry) for relatively low cost but high resolution identification of hybrids and their phylogenetic relations.