29/12/2023 this page is under construction.
The pipeline specificaly test for the quartet: Wine/Eurepean S.cerevisiae (P1) - S.cerevisiae test sample (P2) - European Saccharomyces paradoxus (P3) - Saccharomyces jurei (O).
A schematic about the ABBA and BABA patterns across P1, P2, P3, and O.
In contrast to other software, the 'D function' executes a formula where the numerator is determined by the difference between BABA and ABBA.
Negative, statistically significant D values, indeed support the presence of introgression.
In the case of ILS, the occurrence of both ABBA and BABA patterns is typically random and not biased in a way that would suggest introgression, thus not leading to a significant result in the ABBA-BABA test.
Therefore, a significant result in an ABBA-BABA test is more likely indicative of introgression rather than being attributable to ILS.
The interpretation of ABBA-BABA test can be challenging and require additional lines of evidence and a thorough understanding of the evolutionary history of the organism of interest.
About admixtr : https://bodkan.net/admixr/
About ILS: https://theg-cat.com/2021/03/01/incomplete-lineage-sorting-through-pachinko-a-visual-analogy/
About ABBA-BABA test: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5100745/bin/NIHMS827403-supplement-Supplement.pdf (Green et al., 2010)