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Specific detection of the floodwater mosquitoes Aedes sticticus and Aedes vexans DNA in predatory diving beetles

Insect Science 2015年第4期22卷 549-559页

作者： Thomas Z. Persson Vinnersten peter halvarsson Jan O. Lundstrom Department of Ecology and Genetics Evolutionary Biology Centre Uppsala University SE-75236 Uppsala Swedish Biological Mosquito Control Project Nedre Dalalvens Utvecklings AB Gysinge Sweden

Floodwater mosquitoes （Diptera： Culicidae） are associated with periodically flooded wet meadows, marshes, and swamps in floodplains of major rivers worldwide, and their larvae are abundant in the shallow parts of flooded areas. The nuisance caused by the blood-seeking adult female mosquitoes motivates mosquito control. Larviciding with Bacillus thuringiensis israelensis is considered the most environmentally safe method. However, some concern has been raised whether aquatic predatory insects could be indi- rectly affected by this reduction in a potential vital prey. Top predators in the temporary wetlands in the River Dal/ilven floodplains are diving beetles （Coleoptera： Dytiscidae）, and Aedes sticticus andAe, vexans are the target species for mosquito control. For detailed stud- ies on this aquatic predator-prey system, we developed a polymerase chain reaction （PCR） assay for detection of mosquito DNA in the guts of medinm-sized diving beetles. Primers were designed for amplifying short mitochondrial DNA fragments of the cytochrome C oxidase subunit I （COI） gene in Ae. sticticus and Ae. vexans, respectively. Primer speci- ficity was confirmed and half-life detectability ofAe. sticticus DNA in diving beetle guts was derived from a feeding and digestion experiment. The Ae. sticticus DNA within diving beetle guts was detected up to 12 h postfeeding, and half-life detectability was estimated to 5.6 h. In addition, field caught diving beetles were screened for Ae. sticticus and Ae. vexans DNA and in 14% of the diving beetles one or both mosquito species were detected, showing that these mosquito species are utilized as food by the diving beetles.

关键词： Aedes sticticus Dytiscidae floodwater mosquitoes gut content analysis half-life detectability PCR

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Inbreeding and genetic load in a pair of sibling grouse species:Tetrastes sewersowi and ***

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Avian Research 2024年第2期15卷 265-270页

作者： Kai Song Tom van der Valk Bin Gao peter halvarsson Yun Fang Wendong Xie Siegfried Klaus Zhiming Han Yue-Hua Sun Jacob Hoglund Key Laboratory of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of SciencesBeijing100101China Animal Ecology Department of Ecology and GeneticsUppsala UniversityNorbyvagen 18DUppsala75236Sweden Department of Cell and Molecular Biology Uppsala75273Sweden Unit of Parasitology Department of Biomedicine and Veterinary Public HealthSwedish University of Agricultural SciencesPO Box 7036Uppsala75007Sweden Lindenhohe 5 JenaD-07749Germany The State Key Laboratory of Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijing100101China

Genetic load and inbreeding are recognized as important factors to be considered in conservation *** levels of both can increase the risk of population extinction by negatively impacting fitness-related characters in many species of plants and animals,including humans(inbreeding depression).Genomic tech-niques are increasingly used in measuring and understanding genetic load and inbreeding and their importance in evolution and *** used whole genome resequencing data from two sibling grouse species in subarctic Eurasia to quantify *** found a large range of inbreeding measured as FROH(fraction of runs of homozygosity)in individuals from different populations of Chinese Grouse(Tetrastes sewerzowi)and Hazel Grouse(***).FROH estimated from genome-wide runs of homozygosity(ROH)ranged from 0.02 to 0.24 among Chinese Grouse populations and from 0.01 to 0.44 in Hazel *** from a population of Chinese Grouse residing in the Qilian mountains and from the European populations of Hazel Grouse(including samples from Sweden,Germany and Northeast Poland)were the most inbred(FROH ranged from 0.10 to 0.23 and 0.11 to 0.44,respectively).These levels are comparable to other highly inbred populations of *** Grouse from northern China and Chinese Grouse residing in the Qinghai-Tibetan Plateau showed relatively lower inbreeding *** of the ratio between deleterious missense mutations and synonymous mutations revealed higher levels in Chinese Grouse as compared to Hazel *** results are possibly explained by higher fixation rates,mutational melt down,in the range-restricted Chinese Grouse compared to the wide-ranging Hazel ***,when we compared the relatively more severe class of loss-of-function muta-tions,Hazel Grouse had slightly higher levels than Chinese Grouse,a result which may indicate that purifying selection(purging)has been more efficient in Chinese Grouse on this class of mutations.

关键词： Genetic load Inbreeding Purifying selection Qinghai-Tibetan Plateau ROH Tetrastes

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Conservation genomics of sibling grouse in boreal forests reveals introgression and adaptive population differentiation in genes controlling epigenetic variation

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Zoological Research 2022年第2期43卷 184-187页

作者： Kai Song Bin Gao peter halvarsson Yun Fang Siegfried Klaus Ying-Xin Jiang Jon E.Swenson Zhi-Ming Han Yue-Hua Sun Jacob Hoglund Key Laboratory of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China Animal Ecology Department of Ecology and GeneticsUppsala UniversityUppsala 75236Sweden Unit of Parasitology Department of Biomedicine and Veterinary Public HealthSwedish University of Agricultural SciencesUppsala 75007Sweden Lindenhöhe 5 Jena D-07749Germany Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life SciencesAs NO-1432Norway State Key Laboratory of Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China

The Chinese Grouse(Tetrastes sewerzowi) and Hazel Grouse(T. bonasia) are sibling species that are well-adapted to harsh high-altitude and latitude habitats. In the current study, we sampled and sequenced 29 Chinese Grouse(n=16) and Hazel Grouse(n=13) from eight locations in China, Sweden,Germany, and northeast Poland to analyze population genetic diversity and structure, introgression, and local adaptation.

关键词： northeast adapted controlling

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Conservation genomics of sibling grouse in boreal forests reveals introgression and adaptive population differentiation in genes controlling epigenetic variation

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Zoological Research 2022年第2期

作者： Kai Song Bin Gao peter halvarsson Yun Fang Siegfried Klaus Ying-Xin Jiang Jon E.Swenson Zhi-Ming Han Yue-Hua Sun Jacob H?glund

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