myTAI (version 2.3.4)

stat_reverse_hourglass_test: Reverse Hourglass Test

Description

Test for reverse hourglass patterns in transcriptomic data by comparing mid developmental stages to early and late developmental stages.

Usage

stat_reverse_hourglass_test(phyex_set, modules, ...)

Value

A ConservationTestResult object with reverse hourglass test results

Arguments

phyex_set

A PhyloExpressionSet object

modules

A named list with elements 'early', 'mid', and 'late' containing stage indices for each developmental module

...

Additional arguments passed to stat_generic_conservation_test

Details

The reverse hourglass test evaluates whether mid developmental stages show higher transcriptomic index values (indicating younger genes) compared to both early and late stages. This creates a reverse hourglass pattern where recently evolved genes dominate during mid-development. The test computes a score based on the minimum difference between mid vs. early and mid vs. late TXI values.

See Also

stat_generic_conservation_test, stat_reductive_hourglass_test

Examples

# Define developmental modules
modules <- list(early = 1:2, mid = 3:5, late = 6:7)
result <- stat_reverse_hourglass_test(example_phyex_set_old, modules=modules)