Population genetic structure of Ixodes ricinus in Switzerland from allozymic data: No evidence of divergence between nearby sites

Delaye, Christelle; Béati, Lorenza; Aeschlimann, André; Renaud, François; Meeûs, Thierry De

doi:10.1016/s0020-7519(97)00040-4

Cited by 50 publications

(37 citation statements)

References 19 publications

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“…The result was thereby distinctly different than found by DELAYE et al (1997), where no polymorphism was found in I. ricinus. The noted diurnal variation may be explained by complex interactions between genotype, physiological age and weather conditions influencing behaviour or dismissed as incidental.…”

Section: Discussioncontrasting

confidence: 94%

Diurnal Activity of Ixodes Ricinus in Denmark: Aspects of Physiological Age and Genotypic Variation

Jensen¹,

Kaufmann²,

Смирнова³

2004

Hereditas

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Four different alleles in the nymphal Ixodes ricinus were found for the Malate Dehydrogenase enzyme (MDH). The allele frequency of the MDH genotypes in nymphal I. ricinus was observed to change during the day. Some genotypes were present in the morning, but not in the afternoon and evening. The physiological age of the nymphs was also determined. No significant correlation could be found between physiological age and genotypes. Based on the results it must be anticipated that the comparability of tick samples not only differs in quantity but also in quality for various hours, but not necessarily for various months. Therefore isoenzyme analysis of nymphs at least as regards the MDH alleles appears to be a convenient biological tool to analyse differences in host seeking behaviour.

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Section: Discussioncontrasting

confidence: 94%

Diurnal Activity of Ixodes Ricinus in Denmark: Aspects of Physiological Age and Genotypic Variation

Jensen¹,

Kaufmann²,

Смирнова³

2004

Hereditas

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“…Fluctuations of populations and migration events may easily explain the between-year differentiation. However, the differentiation between males and females was unexpected according to previous results (Delaye et al 1997;but see Healy 1979a). Microsatellites are noncoding markers and we found no evidence for linkage between any locus pair.…”

Section: Discussionmentioning

confidence: 64%

“…The species belonging to the I. ricinus complex are widely distributed throughout the Northern Hemisphere: Europe, western Turkistan, Turkey, Caucasus, North Africa for I. ricinus (Perez and Rohdain 1977), Asia for I. persulcatus (Balmelli and Piffaretti 1996), and North America for I. scapularis and I. pacificus (Rich et al 1995). These ticks can feed on almost any terrestrial vertebrate, including humans and domestic animals (Hoogstraal and Aeschlimann 1982), and can therefore transmit many different pathogens to a diverse range of hosts (e.g., Bernasconi et al 1997;Delaye et al 1997). The distribution of these ticks is spatially discontinuous (Aeschlimann 1981).…”

mentioning

confidence: 99%

“…At present, little is known about the genetic structure of populations and dispersal of Ixodes species. Earlier studies, based on allozyme data, have provided inconclusive results (Healy 1979a,b;Delaye et al 1997;Kain et al 1997). Microsatellite markers appear to be alternative tools for such a purpose (Hughes and Queller 1993), because they are usually highly polymorphic, codominant, abundant throughout the genome, and relatively easy to score (Lehmann et al 1996).…”

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confidence: 99%

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Sex-Biased Genetic Structure in the Vector of Lyme Disease, Ixodes Ricinus

et al. 2002

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Abstract. We analyzed 725 Ixodes ricinus ticks (the principal vector of Lyme disease in Europe) collected in Switzerland in 1995 and 1996 (three and eight samples, respectively) and in Tunisia in 1996 (one sample) with five microsatellite markers. We found highly significant genetic differentiation between Swiss and Tunisian samples but detected almost no differentiation within Switzerland, even between those samples separated by the Alps. Interestingly, we found that I. ricinus females were more genetically related to one another than were males at a local scale, which would indicate a higher dispersal rate of immature males. Possible explanations for these findings in terms of sexspecific association of ticks with certain hosts (e.g., birds) and their epidemiological consequences are discussed.

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“…Other studies based on allozyme data (Delaye et al, 1997) and microsatellite markers (De Meeus et al, 2002) have Fig. 1.…”

Section: Discussionmentioning

confidence: 92%

Assessment of intraspecific mtDNA variability of European Ixodes ricinus sensu stricto (Acari: Ixodidae)

Casati

Bernasconi

Gern

et al. 2008

Infection, Genetics and Evolution

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The Ixodes ricinus complex is composed of 14 species distributed worldwide. Some members of this complex are involved in the transmission of a number of diseases to animals and humans, in particular Lyme borreliosis, tick-borne encephalitis, ehrlichiosis and babesiosis. While the phylogenetic relationships between species of the I. ricinus complex have been investigated in the past, still little is known about the genetic structure within the species I. ricinus sensu stricto. We have investigated the intraspecific variability among 26 I. ricinus s.s. ticks collected in various European countries, including Switzerland, Italy, Austria, Denmark, Sweden, and Finland by using five mitochondrial gene fragments corresponding to the control region, 12S rDNA, cytb, COI, and COII. The five genes considered here showed a low genetic variability (1.6-5%). Our results based on both statistical parsimony (applied to the COI + COII + cytb + 12S + CR data set, for a total of 3423 bp) and maximum parsimony (applied to the COI + COII + cytb + 12S data set, for a total of 2980 bp) did not provide any evidence for a correlation between the identified haplotypes and their geographic origin. Thus, the European I. ricinus s.s. ticks do not seem to show any phylogeography structure.

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Population genetic structure of Ixodes ricinus in Switzerland from allozymic data: No evidence of divergence between nearby sites

Cited by 50 publications

References 19 publications

Diurnal Activity of Ixodes Ricinus in Denmark: Aspects of Physiological Age and Genotypic Variation

Diurnal Activity of Ixodes Ricinus in Denmark: Aspects of Physiological Age and Genotypic Variation

Sex-Biased Genetic Structure in the Vector of Lyme Disease, Ixodes Ricinus

Assessment of intraspecific mtDNA variability of European Ixodes ricinus sensu stricto (Acari: Ixodidae)

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