Abstract
In Culex pipiens L. eight lines with X-ray induced reciprocal translocations and one line with an inversion have been analysed. In such aberrations which are inherited like sex-linked factors, the smallest chromosome is always involved. The sex determining factors M and m respectively are situated on this small chromosome. — The pericentric inversion described here behaves like an autosomal factor and causes semisterility both in females and males due to crossing-over within the inverted region. It is shown that the chromosome of intermediate size carries this inversion and that it belongs to the same linkage group 2 as the eye color mutation ruby. The correlation of linkage groups with chromosomes of the mosquito Culex pipiens is the following: Linkage group 1 bears the sex-factors M and m resp. and the sex-linked genes and is the smallest chromosome (I). Linkage group 2 with the eye color mutation ruby is identical with the chromosome of medium size (II). Linkage group 3 with the male-limited mutation kps is correlated with the longest chromosome (III) (Zusammenfassung see p. 50)
Zusammenfassung
Die Numerierung der drei Koppelungsgruppen von Culex pipiens L. (Laven, 1967b) stimmt mit der bisherigen auf der Größe der Chromosomen beruhenden cytologischen Numerierung (Rai, 1963; Dennhöfer, 1968) überein.
Das kurze Chromosomenpaar (I) trägt die geschlechtsbestimmenden Faktoren M bzw. m und die geschlechtsgekoppelten Gene der 1. Koppelungsgruppe.
Das mittellange Paar (II) entspricht der 2. Koppelungsgruppe, der die Augenfarbmutation ruby (Iltis, Barr, McCelland und Myers, 1965) angehört. Die ungefähre Lokalisierung dieses Allels wird diskutiert.
Das längste der Homologenpaare (III) ist der 3. Koppelungsgruppe gleichzusetzen, der z. B. die männchenbegrenzte Palpenmutation kps (Laven, 1955, 1957) angehört.
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Dennhöfer, L. Die Zuordnung der Koppelungsgruppen zu den Chromosomen bei der Stechmücke Culex pipiens L.. Chromosoma 37, 43–52 (1972). https://doi.org/10.1007/BF00329556
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DOI: https://doi.org/10.1007/BF00329556