Drosophila Pigmentation Variation and Ebony Gene Regulatory Polymorphisms

20 strains from the Drosophila melanogaster Genetic Reference Panel (DGRP) were analyzed for pigmentation variation at seven body positions. The study quantified allele-specific expression for four melanin biosynthesis pathway genes, identifying significant associations between the ebony gene and thoracic pigmentation. Sequence analysis of ebony's regulatory region revealed complex patterns of functional cis-regulatory alleles.

Use Cases

• Analyze associations between ebony gene allele-specific expression and thoracic segment pigmentation intensity across 20 DGRP strains.
• Investigate patterns of cis-regulatory polymorphisms within the ~10 kb regulatory region of ebony for their role in standing phenotypic variation.
• Compare sequence variations in the core cis-regulatory region of tan with its allele-specific expression levels to identify causal SNPs.
• Study the enrichment of distantly associated SNP pairs in ebony's cis-regulatory region to infer interacting genetic elements.

Strengths

• Data originates from the established Drosophila melanogaster Genetic Reference Panel (DGRP), providing a genetically characterized resource.
• Phenotypic measurements are detailed, covering pigmentation at seven distinct body positions in adult females.
• Analysis integrates multiple data types: quantitative pigmentation traits, allele-specific expression for four genes, and detailed sequence analysis of regulatory regions.

Limitations

• The sample size is limited to 20 DGRP strains, which may restrict the statistical power for detecting all genetic associations.
• The dataset focuses on a single natural population from North Carolina, limiting generalizability to other geographic populations.
• Specific file formats, data structure (rows/columns), and raw data size are not provided in the input description.

Provenance

Source

Dryad digital repository.

Collection Method

Pigmentation measured in 20 DGRP strains; allele-specific expression quantified via amplicon sequencing on a 454 GS Junior platform; regulatory regions analyzed via sequence analysis.

Freshness

Last updated in June 2020.

Geography

DGRP strains originated from a natural population in North Carolina, USA.