| Abstrakt: |
Fifteen X-ray induced chromosomal aberrations in twelve autogenous lines of the mosquitoCulex pipiens were analysed: eight simple reciprocal translocations, one double reciprocal translocation, one translocation combined with an intrachromosomal transposition and a small deficiency, one simple transposition, and one pericentric inversion. The breakpoints were located on the morphological map of the salivary gland chromosomes. Their distribution seems to be random. A consideration of distances between breakpoints argues against the assumption of a linear order of chromosomes in the elongated sperm head. The extent of sterility in the heterozygote was recorded for 12 of the aberrations. Translocation heterozygotes, carrying the genetic pool of the lines here analysed, produced about 50% aneuploid gametes, independently of the length of the interstitiell segments. |
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