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. 2022 Jul 22;13:906447. doi: 10.3389/fgene.2022.906447

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Copyright © 2022 Xu, Liu, Yang, Bian, Li and Zhao.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Population structure and relationships of tropical chickens. (A) geographic variation of monthly mean surface temperature for the location of chickens used in the study. (B) neighbor-joining tree. (C) principal component analysis (PCA) with the first (PC1) and second (PC2) principal components. (D) genetic structure of all chicken groups using ADMIXTURE program with K = 2 and K = 3. Indonesian chickens (ID), Indian chickens (IN), Saudi Arabian chickens (SA), and chickens of northern China (NCN).