Worldwide, there are more than 1,000 species belonging to the Fagaceae. All Fagaceae species are ... more Worldwide, there are more than 1,000 species belonging to the Fagaceae. All Fagaceae species are woody plants and are spread throughout the northern hemisphere, from the tropical to the boreal regions. The
Antoine Kremerl, Manuela casasoli2, Teresa Barreneche3, Catherine Bod6n6s1, Paul sisco4, Thomas K... more Antoine Kremerl, Manuela casasoli2, Teresa Barreneche3, Catherine Bod6n6s1, Paul sisco4, Thomas Kubisiak5, Marta scalfi6, Stefano ~ e o n a r d i ~ , Erica Bakker7, Joukje ~u i teve ld~ , Jeanne ~omero-seversong, Kathiravetpillai ~rumuganathan", Jeremy ~ e r o r ~ ' , Caroline scotti-saintape", Guy ~oussel l , Maria Evangelista Bertocchil, Christian ~ e x e r ' ~ , Ilga porth13, Fred ~ e b a r d l ~ , Catherine clark15, John carlson16, Christophe lom mi on', Hans-Peter Koelewijn8, and Fiorella villani17
Antoine Kremerl, Manuela Casasoli2, Teresa ~ar reneche~, Catherine Bod6n2s1, Paul Sisco4, Thomas ... more Antoine Kremerl, Manuela Casasoli2, Teresa ~ar reneche~, Catherine Bod6n2s1, Paul Sisco4, Thomas ~ub i s i ak~ , Marta Scalfi6, Stefano Leonardi6, Erica ~ a k k e r ~ , Joukje ~uiteveld', Jeanne ~omero-Seversong, Kathiravetpillai Arumuganathanlo, Jeremy ~ e r o r ~ ' , Caroline scotti-~aintagne", Guy Roussell, Maria Evangelista Bertocchil, Christian kxerl2, Ilga porth13, Fred ~ e b a r d ' ~ , Catherine clark15, John carlson16, Christophe Plomionl, Hans-Peter Koelewijn8, and Fiorella villani17
The soilborne oomycete Phytophthora cinnamomiâwhich causes root rot, trunk cankers, and stem lesi... more The soilborne oomycete Phytophthora cinnamomiâwhich causes root rot, trunk cankers, and stem lesions on an estimated 5,000 plant species worldwideâis a lethal pathogen of American chestnut (Castanea dentata) as well as many other woody plant species. P. cinnamomi is particularly damaging to chestnut and chinquapin trees (Castanea spp.) in the southern portion of its native range in the United States due to relatively mild climatic conditions that are conductive to disease development. Introduction of resistant genotypes is the most practical solution for disease management in forests because treatment with fungicides and eradication of the pathogen are neither practical nor economically feasible in natural ecosystems. Using backcross families derived from crosses of American chestnuts with two resistant Chinese chestnut cultivars Mahogany and Nanking, we constructed linkage maps and identified quantitative trait loci (QTLs) for resistance to P. cinnamomi that had been introgressed f...
The genusCastaneain North America contains multiple tree and shrub taxa of conservation concern. ... more The genusCastaneain North America contains multiple tree and shrub taxa of conservation concern. The two species within the group, American chestnut (Castanea dentata) and chinquapin (C. pumilasensu lato), display remarkable morphological diversity across their distributions in the eastern United States and southern Ontario. Previous investigators have hypothesized that hybridization betweenC. dentataandC. pumilahas played an important role in generating morphological variation in wild populations. A putative hybrid taxon,Castanea alabamensis, was identified in northern Alabama in the early 20th century; however, the question of its hybridity has been unresolved. We tested the hypothesized hybrid origin ofC. alabamensisusing genome-wide sequence-based genotyping ofC. alabamensis, all currently recognized North AmericanCastaneataxa, and two AsianCastaneaspecies at >100,000 single-nucleotide polymorphism (SNP) loci. With these data, we generated a high-resolution phylogeny, tested ...
Restoration of American chestnut (Castanea dentata) depends on combining resistance to both the c... more Restoration of American chestnut (Castanea dentata) depends on combining resistance to both the chestnut blight fungus (Cryphonectria parasitica) and Phytophthora cinnamomi, which causes Phytophthora root rot, in a diverse population of C. dentata. Over a 14-year period (2004 to 2017), survival and root health of American chestnut backcross seedlings after inoculation with P. cinnamomi were compared among 28 BC3, 66 BC4, and 389 BC3F3 families that descended from two BC1 trees (Clapper and Graves) with different Chinese chestnut grandparents. The 5% most resistant Graves BC3F3 families survived P. cinnamomi infection at rates of 75 to 100% but had mean root health scores that were intermediate between resistant Chinese chestnut and susceptible American chestnut families. Within Graves BC3F3 families, seedling survival was greater than survival of Graves BC3 and BC4 families and was not genetically correlated with chestnut blight canker severity. Only low to intermediate resistance t...
Worldwide, there are more than 1,000 species belonging to the Fagaceae. All Fagaceae species are ... more Worldwide, there are more than 1,000 species belonging to the Fagaceae. All Fagaceae species are woody plants and are spread throughout the northern hemisphere, from the tropical to the boreal regions. The
Antoine Kremerl, Manuela casasoli2, Teresa Barreneche3, Catherine Bod6n6s1, Paul sisco4, Thomas K... more Antoine Kremerl, Manuela casasoli2, Teresa Barreneche3, Catherine Bod6n6s1, Paul sisco4, Thomas Kubisiak5, Marta scalfi6, Stefano ~ e o n a r d i ~ , Erica Bakker7, Joukje ~u i teve ld~ , Jeanne ~omero-seversong, Kathiravetpillai ~rumuganathan", Jeremy ~ e r o r ~ ' , Caroline scotti-saintape", Guy ~oussel l , Maria Evangelista Bertocchil, Christian ~ e x e r ' ~ , Ilga porth13, Fred ~ e b a r d l ~ , Catherine clark15, John carlson16, Christophe lom mi on', Hans-Peter Koelewijn8, and Fiorella villani17
Antoine Kremerl, Manuela Casasoli2, Teresa ~ar reneche~, Catherine Bod6n2s1, Paul Sisco4, Thomas ... more Antoine Kremerl, Manuela Casasoli2, Teresa ~ar reneche~, Catherine Bod6n2s1, Paul Sisco4, Thomas ~ub i s i ak~ , Marta Scalfi6, Stefano Leonardi6, Erica ~ a k k e r ~ , Joukje ~uiteveld', Jeanne ~omero-Seversong, Kathiravetpillai Arumuganathanlo, Jeremy ~ e r o r ~ ' , Caroline scotti-~aintagne", Guy Roussell, Maria Evangelista Bertocchil, Christian kxerl2, Ilga porth13, Fred ~ e b a r d ' ~ , Catherine clark15, John carlson16, Christophe Plomionl, Hans-Peter Koelewijn8, and Fiorella villani17
The soilborne oomycete Phytophthora cinnamomiâwhich causes root rot, trunk cankers, and stem lesi... more The soilborne oomycete Phytophthora cinnamomiâwhich causes root rot, trunk cankers, and stem lesions on an estimated 5,000 plant species worldwideâis a lethal pathogen of American chestnut (Castanea dentata) as well as many other woody plant species. P. cinnamomi is particularly damaging to chestnut and chinquapin trees (Castanea spp.) in the southern portion of its native range in the United States due to relatively mild climatic conditions that are conductive to disease development. Introduction of resistant genotypes is the most practical solution for disease management in forests because treatment with fungicides and eradication of the pathogen are neither practical nor economically feasible in natural ecosystems. Using backcross families derived from crosses of American chestnuts with two resistant Chinese chestnut cultivars Mahogany and Nanking, we constructed linkage maps and identified quantitative trait loci (QTLs) for resistance to P. cinnamomi that had been introgressed f...
The genusCastaneain North America contains multiple tree and shrub taxa of conservation concern. ... more The genusCastaneain North America contains multiple tree and shrub taxa of conservation concern. The two species within the group, American chestnut (Castanea dentata) and chinquapin (C. pumilasensu lato), display remarkable morphological diversity across their distributions in the eastern United States and southern Ontario. Previous investigators have hypothesized that hybridization betweenC. dentataandC. pumilahas played an important role in generating morphological variation in wild populations. A putative hybrid taxon,Castanea alabamensis, was identified in northern Alabama in the early 20th century; however, the question of its hybridity has been unresolved. We tested the hypothesized hybrid origin ofC. alabamensisusing genome-wide sequence-based genotyping ofC. alabamensis, all currently recognized North AmericanCastaneataxa, and two AsianCastaneaspecies at >100,000 single-nucleotide polymorphism (SNP) loci. With these data, we generated a high-resolution phylogeny, tested ...
Restoration of American chestnut (Castanea dentata) depends on combining resistance to both the c... more Restoration of American chestnut (Castanea dentata) depends on combining resistance to both the chestnut blight fungus (Cryphonectria parasitica) and Phytophthora cinnamomi, which causes Phytophthora root rot, in a diverse population of C. dentata. Over a 14-year period (2004 to 2017), survival and root health of American chestnut backcross seedlings after inoculation with P. cinnamomi were compared among 28 BC3, 66 BC4, and 389 BC3F3 families that descended from two BC1 trees (Clapper and Graves) with different Chinese chestnut grandparents. The 5% most resistant Graves BC3F3 families survived P. cinnamomi infection at rates of 75 to 100% but had mean root health scores that were intermediate between resistant Chinese chestnut and susceptible American chestnut families. Within Graves BC3F3 families, seedling survival was greater than survival of Graves BC3 and BC4 families and was not genetically correlated with chestnut blight canker severity. Only low to intermediate resistance t...
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