Combining the meiotic drive gene D and the translocation T1in the mosquito, Aedes aegypti (L.) II. Recombination

✍ Scribed by A. M. Pearson; R. J. Wood

• Publisher: Springer Netherlands
• Year: 1980
• Tongue: English
• Weight: 418 KB
• Volume: 54
• Category: Article
• ISSN: 0016-6707
• DOI: 10.1007/bf00122411

✦ Synopsis

Recombination on the sex-chromosome of Aedes aegypti has been studied in male genotypes incorporating the sex-linked translocation T1 and the meiotic drive gene D from three different strains (Trinidad, Bozo and Caracas).

The introduction of the D gene was associated with an increase in recombination between w and bit (reduced pseudolinkage) in Trinidad DTI/+ malesl compared with "1"1/+ males, but not in Bozo or Caracas DT1/+ males.

Recombination between M and w, and between M and ru, also varied between male genotypes, but there was no correspondence with w-bit variation, except a degree of negative interference between M-w and w-blt.

Four new DTJT~ lines were obtained after outbreeding and reconstituting the Trinidad DT,/T, strain. Heterozygotes (DTI/+) from two out of these four lines did not show the increased w-bit recombination observed in the original Trinidad DT~/+ males.

These two heterozygotes, as well as the Bozo and Caracas DTJ+ males, also failed to show two other properties associated with the basic DT1/+ male: (1) enhanced sex-ratio distortion; -(2) high variance in fertility compared with T1/+. All these properties probably resulted from a common factor inherited from the JY stock, at a position near w, when T1 and the Trinidad D were originally combined. The nature of this factor is discussed.