Chromosomal Variation, Segregation and Sex Determination in Hydrotaea Meridionalis (Diptera: Muscidae)

Loeschcke, Volker; Nielsen, Bjarne; Andersen, Ditte Holm

doi:10.1111/j.1601-5223.1993.00229.x

Cited by 2 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This hypothesis is supported by some cytological findings. The species in the H. irritans group, consisting of H. irritans , H. pandellei , H. pellucens , H. borussica and H. meridionalis , all show some peculiarities concerning variation in chromosome number and type (Loeschcke et al. 1993, 1994) that are not found in more distantly related Hydrotaea species.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Genetic evidence for population expansion in Hydrotaea irritans (Fallen) (Diptera: Muscidae)

Loeschcke¹,

Nielsen²,

Pedersen³

et al. 2004

J Zoological System

Self Cite

View full text Add to dashboard Cite

Allozyme variation in the sheep headfly Hydrotaea irritans was studied on two spatial scales. Geographic variation among seven Danish and one Dutch population revealed significant but rather low genetic differentiation with F ST ¼ 0.01 over all loci. The Dutch population was on average not more different from the Danish populations than the Danish populations from each other. Allele frequencies were very skewed with the most common allele always exceeding 0.85 and usually 0.9 in frequency, but with many rare alleles at some loci. Tests for neutrality of the variation at the nine polymorphic loci revealed highly significant deviations from expected homozygosity in this species, which was not found in a comparative analysis of allozyme variation at similar loci of seven other Hydrotaea species. To explain the peculiar observed pattern of allozyme variation in H. irritans, it is suggested that this species has successfully expanded its range and spread through northern and central Europe in the recent past. Alternatively, H. irritans may have recently invaded a new niche, resulting in increased abundance of the species and subsequent dispersal to former areas of the species distribution.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Further, genetic studies have revealed some peculiarities within the genus Hydrotaea (Robineau–Desvoidy). Evidence for autosomal sex determination in Hydrotaea meridionalis (Loeschcke et al. 1993) and related species (Loeschcke et al.…”

Section: Introductionmentioning

confidence: 99%

Genetic evidence for population expansion in Hydrotaea irritans (Fallen) (Diptera: Muscidae)

Loeschcke¹,

Nielsen²,

Pedersen³

et al. 2004

J Zoological System

Self Cite

View full text Add to dashboard Cite

show abstract

“…albipuncta and H. borussica. Adult gonads or neural ganglia from 6-8 weeks old third instar larvae were used for chromosome preparations following standard procedures including C-or G-band staining (MACGREGOR and VARLEY 1983; for details see LOESCHCKE et al 1993). The remains of the adult flies or larvae were frozen (-70°C) for later use in electrophoresis.…”

Section: Chromosome Analysesmentioning

confidence: 99%

Relationship Among Hydrotaea Species Based on Allozymes, Karyotype and Morphology (Diptera: Muscidae)

2004

Self Cite

View full text Add to dashboard Cite

Allele frequencies at 12 allozyme loci are presented together with the karyotypes of six Hydrotaea species, H. irritans, H. meridionalis, H. velutina, H. pellucens, H. pandellei, and H. meteorica. For these six, and two further species, H. albipuncta and H. borussica, the allozyme data are used to construct phylogenetic trees. Relatedness as estimated on basis of these trees was then compared to similarity in karyotype and morphology. Conclusions based on allozymes, karyotype, and morphology, were mainly qualitatively similar. Genetic analyses and morphology coincided to the conclusion that H. irritans, H. pandellei, and H. pellucens belong to one group of closely related species, and that H. albipuncta and H. meteorica were least related to the other species analysed and also rather distinct from each other. Finally, the three species, H. meridionalis, H. borussica, and H. velutina were equally different from each other and the irritans‐subgroup when judged by allozyme data, but based on karyotype and morphology, H. meridionalis and H. borussica, but not H. velutina, could be considered as part of the irritans subgroup.

show abstract

Chromosomal Variation, Segregation and Sex Determination in Hydrotaea Meridionalis (Diptera: Muscidae)

Cited by 2 publications

References 12 publications

Genetic evidence for population expansion in Hydrotaea irritans (Fallen) (Diptera: Muscidae)

Genetic evidence for population expansion in Hydrotaea irritans (Fallen) (Diptera: Muscidae)

Relationship Among Hydrotaea Species Based on Allozymes, Karyotype and Morphology (Diptera: Muscidae)

Contact Info

Product

Resources

About