Eur. J. Entomol. 108 (1): 17-24, 2011 | 10.14411/eje.2011.002

Cream and albinotic - two new mutations affecting body colour in Pyrrhocoris apterus (Heteroptera: Pyrrhocoridae)

Radomír SOCHA
Biology Centre ASCR, Institute of Entomology, Branišovská 31, CZ-370 05 České Budějovice, Czech Republic,

Two new body-colour mutations, albinotic (alb) and cream (cr) are isolated and described for the flightless wing-polymorphic bug, Pyrrhocoris apterus (L.). The body colour of alb mutants is white and that of cr mutants either a light cream or creamy yellow. Both the alb and cr mutations most probably inhibit the biosynthesis of the red pigment in epidermal cells that is responsible for the red-coloured body of wild-type bugs. Although sometimes the body colour of younger larval instars of cr mutants is a slightly darker creamy yellow and that of last larval instars of the alb mutants a slightly whiter greyish, there were no other important developmental changes in the body colour of alb and cr homozygous bugs associated with metamorphosis and post-metamorphic aging of adults. Standard genetic analyses showed that both these mutations are inherited as autosomal recessives and exhibit complete penetrance and uniform expression in both sexes. The fertility of the alb and cr homozygous females and fertilization success of the alb and cr homozygous males were substantially lower than those of wild-type bugs.

Keywords: Firebug, body-colour mutants, albinotic, cream, inheritance pattern, reproductive potential

Received: April 16, 2010; Accepted: June 10, 2010; Published: January 3, 2011

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References

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