Conservation and Utilisation of Genetic Resources of European Elms
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EUROPEAN COMMISSION Conservation and utilisation of genetic resources of European elms Eric Collin Cemagref. UR. Ecosystèmes Forestiers 45290 Nogent-sur-Vernisson Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Presentation plan 1. Elm species and Dutch elm disease 2. Achievements of elm Breeding 3. Methods and progress in elm GR conservation 4. Evaluation of native European elm material 5. Growing elms as valuable broadleaves ? 6. Perspectives : ElmPops project proposal Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Elm taxonomy - no agreement on the number of elm species - 30-40 species in the world - > 20 in Asia -ca 6 in North America - ca 3–4 « large species » in Europe Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) The 3 major ‘kinds’ of European elms EUROPEAN COMMISSION ns tai un mo riparian forests + hedges ri fo pa r re ia s n Wych elm Field elm White elm ts Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Latin names for Field elms… Ö cannot be Ulmus campestris L. (nomen ambiguum) because Linneaus mixed up Field elms and Wych elms Ö are very variable in leaf size and branching habit Ö can be split in different species (Melville = splitter) or in different varieties (Richens = lumper) Ö form a species complex with the Wych elm and show many hybrid and introgressed forms Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION The English elm: a species or a cultivar introduced by the Romans ? Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Field elm and English elm Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Distribution of the English elm (Richens 1983) Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION cpDNA haplotypes of the English elm and other European elms (Gil et al. 2004) Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION The Cornish elm: species or variety ? Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Distribution of the Cornish elm (Richens 1983) Collin E., COST Action E42 Growing Valuable BroadleavesE. COLLIN(Leuven, 04/1998 BE, 20 april 2006) EUROPEAN COMMISSION Field elms: Melville (1946) vs Richens (1983) U. plotii U. stricta U. carpinifolia U. procera Druce Lind. Gled. Salisb. Plot elm Cornish elm Smooth-leaved elm English elm U. minor U. minor var. lockii var. cornubiensis U. minor var. vulgaris U. minor Mill. sensu lato U. minor Mill. sensu latissimo Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION The 3 major ‘kinds’ of European elms Wych elm Field elm White elm U. minor Mill. U. glabra Huds. U. carpinifolia Gled. U. laevis Pall. Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Field elms - mature trees lost to DED - but resprouts and root suckering - ‘semi-artificial pops’ in hedgerows Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION The Wych elm (= mountain elm) Ö moderately variable in leaf shape (‘atlantic’ form in the UK, ‘northern’ race in Scandinavia) Ö has not been of much interest to ‘species splitters’ Ö can hybridize with and be introgressed by field elms Ö preferred Latin name: Ulmus glabra Huds. Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Wych elm - very susceptible to DED - no suckering, little resprouting - reproduces by seed - natural populations Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION The European white elm Ö not a major issue for elm taxonomists (shows no or little morphological variation) Ö does not hybridize with other elm species Ö preferred Latin name: Ulmus laevis Pall. (but the old binomial: Ulmus peduncalata Foug. was more explicit) Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION White elm - less threatened by DED than by the destruction of its habitat - rare or absent in western Europe - small natural populations - risk of genetic drift in fragmented populations Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Asiatic elm sp. of major interest (1) Ulmus pumila L. (China, Korea, Mongolia, Siberia) Ö generally very resistant to DED ; used in breeding Ö introduced in Spain in the XVIth century ; Ö hybridizes spontaneously with the European field elm Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Asiatic elm sp. of major interest (2) Ulmus davidiana var. japonica (Japan) Ö used in breeding for resistance to DED Ulmus wallichiana L. (India: Himalaya) Ö related to Ulmus glabra Ö used in breeding for resistance to DED Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Presentation plan 1. Elm species and Dutch elm disease 2. Achievements of elm Breeding 3. Methods and progress in elm GR conservation 4. Evaluation of native European elm material 5. Growing elms as valuable broadleaves ? 6. Perspectives : ElmPops project proposal Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Dutch elm disease (DED) Ophiostoma sp. Scolytus sp. Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION DED host/vector/pathogen system (Pajares et al. 2003) Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Bark beetle and its feeding groove at a twig crotch photo: D. Piou Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION photo: Pajares et al. 2003 Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Two enormously destructive pandemics Brasier, 1996 Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Names for the agent of DED Perfect stage Ophiostoma novo-ulmi Ophiostoma ulmi formerly: Ceratocystis ulmi Imperfect stage Pesotum ulmi formerly: Graphium ulmi Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION A virus (d-infected) culture of Ophiostoma novo-ulmi Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Distribution of Ophiostoma novo-ulmi subsp. americana and subsp. novo-ulmi in 1990 (Brasier 2004) Subsp. americana introduced in the UK in the 1960’s Subsp. novo-ulmi introduced in Moldova in the 1940’s Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Presentation plan 1. Elm species and Dutch elm disease 2. Achievements of elm Breeding 3. Methods and progress in elm GR conservation 4. Evaluation of native European elm material 5. Growing elms as valuable broadleaves ? 6. Perspectives : ElmPops project proposal Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Breeding elms for resistance to DED Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Elm Breeding programmes (1) Dorschkamp Res. Inst. (NL) : 1928Î1992 ª 4 generations of clones released by Hans Heybroek (e.g. ‘Commelin’, ‘Lobel’, ‘Dodoens’, ‘Plantyn’, ‘Columella’) ª EU project (1978) for tests in 9 countries (e.g. ‘Lutèce’,… selected by INRA, FR) CNR Florence (IT) : late 1970sÎ ª crosses of U. pumila x Heybroek’s clones obtained by Lorenzo Mittempergher (released: ‘San Zanobi’, ‘Plinio’,…) Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Great-grandparents, grandparents, parents of cultivar NANGUEN ‘Lutèce’® Lutèce Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION ‘San Zanobi’ ( ‘Plantyn’ x U. pumila ) Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Elm Breeding programmes (2) UPM Madrid (SP) : late 1980sÎ ª crosses of U. pumila x native U. minor are being evaluated by Luis Gil Wisconsin Uni. (USA) : 1969Îlate 1990 ª different types of hybrids released by Gene Smalley (e.g. ‘Sapporo Autumn Gold’, an U. japonica x U. pumila natural hybrid widely planted in Europe) Other breeding programmes ª are/were carried out in the USA (USDA; Morton Arb.) Uni. of Abertay (Scotland): Genetically Modified elms ª obtained and being tested by Kevan Gartland Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20 april 2006) EUROPEAN COMMISSION Presentation plan 1. Elm species and Dutch elm disease 2. Achievements of elm Breeding 3. Methods and progress in elm GR conservation 4. Evaluation of native European elm material 5. Growing elms as valuable broadleaves ? 6. Perspectives : ElmPops project proposal Collin E., COST Action E42 Growing Valuable Broadleaves (Leuven, BE, 20