Abstract
Starting from the Sambucus strain of the two-spotted spider miteTetranychus urticae Koch, the strains ND1 and ND2 were selected for lack of diapause under a short-day regimen (LD 10∶14, 18°C). The genetic basis of the suppression of diapause in ND1 and ND2 was analysed by means of mendelian crosses and backcrosses, using the photoperiodic cycle LD 10∶14 as diagnostic for the distinction of diapausing and non-diapausing phenotypes. Suppression of diapause is inherited as a recessive trait. From backcross analysis it was concluded that the suppression of diapause in ND1 and ND2 is under monogenic control. The major genes for suppression of diapause in ND1 and ND2 are alleles at a locus designated asd. A mutation for albinism of the locusa-p is pleiotropic for suppression of diapause. It was shown from crosses between ND1 and the albino strain, thatd anda-p are distinct loci.
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Ignatowicz, S., Helle, W. Genetics of diapause supression in the two-spotted spider mite,Tetranychus urticae Koch. Exp Appl Acarol 2, 161–172 (1986). https://doi.org/10.1007/BF01213759
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DOI: https://doi.org/10.1007/BF01213759