Search

Start Over Creator Jan Zima

3. Identification of microsatellite markers for a worldwide distributed, highly invasive ant species Tapinoma melanocephalum (Hymenoptera: Formicidae)

Creator:
Jan Zima, Lebrasseur, Ophélie, Michaela Borovanská, and Janda, Milan
Format:
print, počítač, and online zdroj
Type:
article, články, journal articles, model:article, and TEXT
Subject:
Zoologie, blanokřídlí, Hymenoptera, Formicidae, Tapinoma melanocephalum, microsatellites, invasive species, homozygosity excess, 2, and 59
Language:
English
Description:
Tapinoma melanocephalum is a worldwide distributed, highly invasive ant species. It lives in close association with human societies and its distribution is human-mediated in large measure. The geographical origin of this ant species is unknown, but its introduction in areas previously devoided of its presence can represent a threat to the native biota, act as an agricultural pest or as a pathogen vector. To investigate the genetic structure and phylogeography of this species we identified 12 new polymorphic microsatellite markers, and in addition, we tested and selected 12 ant-universal microsatellites polymorphic in T. melanocephalum. We genotyped 30 individuals from several islands of Micronesia and Papua-New Guinea. All 24 loci exhibited strong homozygosity excess (45-100%, mean = 86%), while the number of alleles per locus reached usual values (2-18, mean = 6.5), resulting in levels of expected heterozygosity much higher than observed. Based on several robust tests, we were able to exclude artefacts such as null alleles and allelic dropout as a possible cause of the observed pattern. Homozygosity excess might be a consequence of founder effect, bottleneck and/or inbreeding. As our sample population was composed of individuals from several distinct localities, the Wahlund effect might have contributed to the increased homozygosity as well. Despite the provisionally observed deviation from the Hardy-Weinberg equilibrium, the newly developed microsatellites will provide an effective tool for future genetic investigations of population structure as well as for the phylogeographic study of T. melanocephalum., Jan Zima Jr., Ophélie Lebrasseur, Michaela Borovanská, Milan Janda., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. Jak se maluje prales

Creator:
Jan Zima
Format:
print
Type:
article, recenze, model:article, and TEXT
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, přírodní vědy, zoologie, natural sciences, zoology, 12, and 00
Language:
Czech
Description:
Painting the Jungle, the amply illustrated publication of an excellent Czech author of scientistific drawings, Jan Dungel, brings together fascinating photos and drawings of the jungle from his journeys through South America - Amazonian rainforests, savannahs (grassland with widely spaced trees), Llanos (extensive systems of grasslands on flat plains) or in Pantanal (the world´s largest wetland area in Brazil, Bolivia and Paraguay). and [autor recenze] Jan Zima.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

5. Tři otázky pro ředitele ústavů AV ČR, veřejných výzkumných institucí

Creator:
Luděk Frank, Zbyněk Jaňour, Zdeněk Chára, Řídký, Jan, Jan Kopečný, Eva Syková, Jan Zima, Lubomír, Lízal, and Malý, Jiří
Format:
print
Type:
article, články, model:article, and TEXT
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, Akademie věd České republiky, vědecké ústavy, research institutions, 12, and 00
Language:
Czech
Description:
This month we continue with the comments of the directors of all the Academy institutes, who were asked these three questions: In which direction they will lead the development of their institutes? What are they doing to achieve excellence in science? Can they evaluate the work in accordance with the new statutes called Public Research Institution?
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public