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Table 1 Migration edges inferred by TREEMIX and results of four population tests

From: Genome-wide markers reveal a complex evolutionary history involving divergence and introgression in the Abert’s squirrel (Sciurus aberti) species group

Migration edge added Migration weight in final model Variance explained F4 Test Tree Observed f4 P-value
No migration 97.8%
kaibabensis - > aberti Coc-Gila 0.146 98.6% (ferreus Pike, kaibabensis; chuscensis, aberti Coc-Gila) 0.01514 < 0.00001
ferreus Pike - > ferreus Carson E 0.303 99.3% (ferreus Pike, chuscensis; ferreus Carson E, aberti San Juan) 0.01082 < 0.00001
equally related to ferreus Carson E, aberti Carson-SFW, aberti San Juan - > aberti Carson-SFW 0.279 99.6%   
barberi - > aberti Coc-Gila 0.101 99.8% (aberti Coc-Gila, chuscensis; barberi, ferreus Pike) 0.00706 < 0.00001
kaibabensis - > common ancestor of chuscensis, aberti MT-Zuni, and aberti Coc-Gila 0.030 99.9% (barberi, kaibabensis; ferreus Pike, aberti MT-Zuni) 0.00156 0.0160
(barberi, kaibabensis; ferreus Pike, chuscensis) 0.00116 0.0720