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Characteristics of a Laboratory Strain of Coleomegilla maculata with a Novel Heritable Wing Spot Pattern Trait


Affiliations
1 Biological Control of Pests Research Unit, National Biological Control Laboratory, US Department of Agriculture, Agricultural Research Service, Stoneville, MS, United States
 

The lady beetle Coleomegilla maculata is a common New World insect that is naturally colored pink to red or orange with black spots on the forewings of the adult stage. Previous laboratory inbreeding resulted in selection for a strain lacking red pigment in the cuticle and eyes. An additional strain selected for a novel spotting pattern is described here. The inheritance of the new trait, "ten spotted" (10sp), was determined by classical crossing experiments. Inheritance of the trait was autosomal and exhibited incomplete dominance. Bionomic strain measurements were compared to the parental strains and were similar overall. Two expressed sequences from C. maculata that may be related to the new phenotype were compared to model insect genes encoding a melanin biosynthesis enzyme and a patterning transcription factor.

Keywords

Coccinellidae, Mutant Phenotype, Melanin, Ebony, Wing Pattern.
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  • Characteristics of a Laboratory Strain of Coleomegilla maculata with a Novel Heritable Wing Spot Pattern Trait

Abstract Views: 250  |  PDF Views: 52

Authors

Margaret Louise Allen
Biological Control of Pests Research Unit, National Biological Control Laboratory, US Department of Agriculture, Agricultural Research Service, Stoneville, MS, United States

Abstract


The lady beetle Coleomegilla maculata is a common New World insect that is naturally colored pink to red or orange with black spots on the forewings of the adult stage. Previous laboratory inbreeding resulted in selection for a strain lacking red pigment in the cuticle and eyes. An additional strain selected for a novel spotting pattern is described here. The inheritance of the new trait, "ten spotted" (10sp), was determined by classical crossing experiments. Inheritance of the trait was autosomal and exhibited incomplete dominance. Bionomic strain measurements were compared to the parental strains and were similar overall. Two expressed sequences from C. maculata that may be related to the new phenotype were compared to model insect genes encoding a melanin biosynthesis enzyme and a patterning transcription factor.

Keywords


Coccinellidae, Mutant Phenotype, Melanin, Ebony, Wing Pattern.