SALIX · World Classification and Phylogeny of Salicaceae s. str.
6РП — Действия „Мария Кюри“
- Период
- 2006-05-08 → 2008-05-07
- Финансиране от ЕС
- 219 007 €
- Участници
- 1
- Схема
- IIF
Линиите свързват координатора с партньорите.
Накратко на български
Семейството на върбите, включващо тополи и осики, се анализира чрез ДНК маркери и външни белези. Това помага да се разберат пътищата на еволюцията им и защо традиционното класифициране на тези растения е затруднено.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Final Activity Report Summary - SALIX (World classification and phylogeny of Salicaceae s. str.)
The willow family, including willows, poplars, aspen and cottonwoods, has always been one of the most difficult to understand and classify. The objective of this research was to combine the existing regional classifications into a worldwide classification using the literature, morphological characters and investigating the phylogenetic relationships using molecular markers. The DNA from a large number of species representing plants from all groups of the willow family, from all regions around the world and growing in different ecological habitats was extracted, analysed and saved in the DNA bank at Kew. The most important result that explains the difficulties in identification and classification of the willow family is that most of the taxa from genera to species level are non-monophyletic which could have resulted from gene duplication, lineage sorting or hybridisation. The use of a low copy nuclear gene, ADH (alcohol dehydrogenase), allowed us to investigate which species share the same ancestoral characters and therefore the routes of their evolution. As a result of this research, in some cases, we can say which species evolved from hybridisation events. However, the classification based on morphology is not the same as the one we have got from this molecular analysis. According to the molecular data all the genera of the willow family (willows, poplars, aspens and cottonwoods) should form a single genus which is in disagreement with their morphology. To resolve this incongruence much more research at the population level is required. Until then it is not possible to make any new classification into groups in the willow family. However, the worldwide checklist of species that has been produced will be even more useful in the light of the above mentioned results to help in the establishment of local floras. Interactive keys for the willow family (genera and species levels) will be published on the internet shortly.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Species of the family Salicaceae s.str. are valuable resources for bioremediation and as a potential biofuel, in addition to their traditional importance in soil stabilisation, basketry, medicine, etc. Breeding programmes to maximise useful traits depend upon accurate and comprehensive identification of the species. However, the species of this family are notoriously difficult to identify because of the great variability within the species and the ease with which they hybridise. At present there is no univ ersally accepted classification of Salicaceae s.str.The project will characterise both genera, Salix L. and Populus L., of Salicaceae s.str. comprising about 620 species worldwide. It will result in the creation of a comprehensive database of characters, taxonomically validated names, synonyms, bibliographic details, geographical distribution, illustrations and taxonomic comments. On the basis of this database, a checklist will be created and published as a book and on the Internet. An interactive key will also be made available on the Internet. Using the collected morphological data, a worldwide classification system will be constructed, for the first time, for these two genera.This classification will be combined with the results of a molecular genetic analysis of the species using both plastid and nuclear genetic markers, which will also establish phylogenetic relationships within these two genera. In doing so, DNA from species acquired from the field and from contacts and herbaria around the world, will be added to the DNA bank at the host institution. The project will combine one of the most experienced systematic botanists specialising in the family Salicaceae s.str. with one of the foremost botanical collections and laboratories in the world, to create a definitive classification of an economically important group of plants. The Fellow will learn molecular genetic methods and be able to introduce them to her institute on return to her home country.
Оригинален текст от CORDIS (на английски).
Участници
- ROYAL BOTANIC GARDENS KEW · RICHMONDКоординаторОбединеното кралство
Връзки
Данни: CORDIS, © Европейски съюз