PSYLLOIDEA PHYLOGENY · Morphological and molecular phylogeny of the Psylloidea (Insecta, Hemiptera): an integrative approach to resolve ancient relationships between insects and host-plants
6РП — Действия „Мария Кюри“
- Период
- 2004-12-01 → 2007-11-30
- Финансиране от ЕС
- 247 764 €
- Участници
- 1
- Схема
- OIF
Линиите свързват координатора с партньорите.
Накратко на български
Псилидите (скочащи растителни въшки) и техните връзки с растенията-гостоприемници се анализират чрез морфологични и генетични данни. Това помага да се разбере как насекомите и растенията са еволюирали заедно и как географската изолация влияе върху появата на нови видове.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Final Activity Report Summary - PSYLLOIDEA PHYLOGENY (Morphological and molecular phylogeny of the Psylloidea (Insecta, Hemiptera): to resolve ancient relationships between insects and host-plants)
The main objective of the project was to infer a classification of phytophagous insects called 'jumping plant lice' (or 'psyllids') based on the evolution of the group. Due to their very restricted range of host-plants, psyllids are an excellent model to study co-evolution or parallel evolution between plants and insects throughout geological time, but our phylogenetic knowledge in Psylloidea was still very poor. Field trips in the Tropics allowed to get fresh material for the phylogenetic reconstruction of the super-family Psylloidea based on the world fauna, as well as description of species new for science. Some other subgroups have been sampled and analysed more precisely in order to get both micro- and macro-evolutionary aspects of the observed biodiversity. We have concluded that insects diversification occurred often on phylogeneticaly close host-plants, and we modulated this general scheme in reference with the taxonomic level (family, suprageneric or generic level). However, geographical vicariance (isolation of two areas and subsequent separate evolution of floras and faunas) has also been pointed out to explain the observed distribution nowadays, as well as ecological ability to share food and habitats that led to sympatric speciation events (evolution of new species in the same area). Generalisation of results has also been tested in other hemipteran groups like Coccoidea (scale insects), Fulgoromorpha (planthoppers) and Cicadomorpha (cicadas).
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Psylloidea is a basal group of Hemiptera whose internal affiliations are not well understood. This study will attempt to infer relationships between closely related groups of Psylloidea. The approach involves recognition and selection of relevant morphological and molecular characters for cladistic analysis.Homologous morphological characters will be particularly identified in the head of Psylloidea, and their phylogenetic information will be tested. Interspecific variations in structure and homology of these characters will be defined. A second set of molecular characters will be based on nucleotide sequences of 18S rRNAs, as well as on coding gene sequences.Character homology will be established through an alignment based on secondary structure, site by site. Phylogenetic analyses using the morphological and molecular data sets will give for the first time a framework phylogenetic estimate for Psylloidea.This broader phylogenetic context is needed to test hypotheses about plant-insect relationships: evolution of gall production, synchronization of life cycles between host-plants and insects, or role of the host specialization in the evolution of the group. This description of biodiversity for a group of insects of economic importance will require a multi-disciplinary competence in systematics.The project will be firstly conducted at the Museum of Natural History in Basel (Switzerland), where the only active specialist of the group (D. Burckhardt) is in charge of the second most important collection of psyllids in the world. The return phase will take advantage of the theoretical and practical expertise of the return research team in testing evolutionary models of evolution.The mutual benefits of such a promising cooperation between a EU Member State and a Third Country will be to give the necessary abroad experience to the applicant, and to higher the level of scientific exchanges between both institutions.
Оригинален текст от CORDIS (на английски).
Участници
- MUSEUM NATIONAL D'HISTOIRE NATURELLE · PARISКоординаторФранция
Връзки
Данни: CORDIS, © Европейски съюз