Abstract
Laboratory colonies of the black fly Simulium vittatum Zetterstedt cytospecies IS-7 were analyzed cytogenetically and compared with the original New York population from which source material was collected 18 yr earlier. All sex chromosomes and major autosomal polymorphisms that were present in the source population were still represented in the laboratory colonies. However, the extent of sex linkage and the frequencies of four of the five major autosomal inversions changed significantly in at least one colony, perhaps because of bottlenecks experienced by the colony. A complete absence of males homozygous for the IS-7 inversion in both field and colony material is explained by postulating that the Y2 chromosome, representing the inverted condition for the IS-7 sequence, is absent from the population or acts as a rare reproductive lethal. This example possibly represents pseudo-partial sex linkage involving the X-linked sequences.
| Original language | English |
|---|---|
| Pages (from-to) | 293-297 |
| Number of pages | 5 |
| Journal | Journal of Medical Entomology |
| Volume | 39 |
| Issue number | 2 |
| State | Published - Mar 2002 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Insect Science
- veterinary(all)
Cite this
Cytogenetics of laboratory colonies of Simulium vittatum cytospecies IS-7 (Diptera : Simuliidae). / Brockhouse, Charles; Adler, Peter H.
In: Journal of Medical Entomology, Vol. 39, No. 2, 03.2002, p. 293-297.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cytogenetics of laboratory colonies of Simulium vittatum cytospecies IS-7 (Diptera
T2 - Simuliidae)
AU - Brockhouse, Charles
AU - Adler, Peter H.
PY - 2002/3
Y1 - 2002/3
N2 - Laboratory colonies of the black fly Simulium vittatum Zetterstedt cytospecies IS-7 were analyzed cytogenetically and compared with the original New York population from which source material was collected 18 yr earlier. All sex chromosomes and major autosomal polymorphisms that were present in the source population were still represented in the laboratory colonies. However, the extent of sex linkage and the frequencies of four of the five major autosomal inversions changed significantly in at least one colony, perhaps because of bottlenecks experienced by the colony. A complete absence of males homozygous for the IS-7 inversion in both field and colony material is explained by postulating that the Y2 chromosome, representing the inverted condition for the IS-7 sequence, is absent from the population or acts as a rare reproductive lethal. This example possibly represents pseudo-partial sex linkage involving the X-linked sequences.
AB - Laboratory colonies of the black fly Simulium vittatum Zetterstedt cytospecies IS-7 were analyzed cytogenetically and compared with the original New York population from which source material was collected 18 yr earlier. All sex chromosomes and major autosomal polymorphisms that were present in the source population were still represented in the laboratory colonies. However, the extent of sex linkage and the frequencies of four of the five major autosomal inversions changed significantly in at least one colony, perhaps because of bottlenecks experienced by the colony. A complete absence of males homozygous for the IS-7 inversion in both field and colony material is explained by postulating that the Y2 chromosome, representing the inverted condition for the IS-7 sequence, is absent from the population or acts as a rare reproductive lethal. This example possibly represents pseudo-partial sex linkage involving the X-linked sequences.
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M3 - Article
VL - 39
SP - 293
EP - 297
JO - Journal of Medical Entomology
JF - Journal of Medical Entomology
SN - 0022-2585
IS - 2
ER -