Drosophila Lifespan and Aging Genetic Variance Across Sexes

A 2020 study by Robert M. Griffin provides genetic variance estimates for lifespan and aging in Drosophila melanogaster. The analysis uses 80 chromosome substitution lines, with 40 targeting the X chromosome and 40 targeting the major autosomes, to compare additive genetic variation within and between sexes.

Use Cases

• Compare X-linked and autosomal additive genetic variance for lifespan and aging traits between male and female Drosophila.
• Analyze sex-specific genetic variation enrichment on the X chromosome for lifespan using the chromosome substitution line data.
• Investigate intersexual genetic correlation patterns for aging, as suggested by the study's findings.

Strengths

• Data derived from a controlled experiment using 80 distinct chromosome substitution lines.
• Provides sex-specific and cross-sex genetic (co)variance estimates for two key biological traits.
• Study explicitly tests theoretical predictions about X chromosome versus autosomal genetic variation.

Limitations

• Sample size in terms of biological replicates or rows is not specified in the provided metadata.
• Results for the aging trait were described as less conclusive than those for lifespan.
• The dataset's scope is limited to a single model organism, Drosophila melanogaster.

Provenance

Source

Dryad digital repository.

Collection Method

Experimental assay of 80 chromosome substitution lines (40 X, 40 autosomes) in Drosophila melanogaster.

Freshness

Last updated in June 2020.