Characterizing identity by descent segments in Chinese interpopulation unrelated individual pairs
Identity by descent (IBD) segments, uninterrupted DNA segments derived from the same ancestral chromosomes, are widely used as indicators of relationships in genetics. A great deal of research focuses on IBD segments between related pairs, while the statistical analyses of segments in irrelevant ind...
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| Veröffentlicht in: | Molecular genetics and genomics : MGG 2024-12, Vol.299 (1), p.37-37, Article 37 |
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| creator | Ji, Qiqi Yao, Yining Li, Zhimin Zhou, Zhihan Qian, Jinglei Tang, Qiqun Xie, Jianhui |
| description | Identity by descent (IBD) segments, uninterrupted DNA segments derived from the same ancestral chromosomes, are widely used as indicators of relationships in genetics. A great deal of research focuses on IBD segments between related pairs, while the statistical analyses of segments in irrelevant individuals are rare. In this study, we investigated the basic informative features of IBD segments in unrelated pairs in Chinese populations from the 1000 Genome Project. A total of 5922 IBD segments in Chinese interpopulation unrelated individual pairs were detected via IBIS and the average length of IBD was 3.71 Mb in length. It was found that 17.86% of unrelated pairs shared at least one IBD segment in the Chinese cohort. Furthermore, a total of 49 chromosomal regions where IBD segments clustered in high abundance were identified, which might be sharing hotspots in the human genome. Such regions could also be observed in other ancestry populations, which implies that similar IBD backgrounds also exist. Altogether, these results demonstrated the distribution of common background IBD segments, which helps improve the accuracy in pedigree studies based on IBD analysis. |
| doi_str_mv | 10.1007/s00438-024-02132-7 |
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| title | Characterizing identity by descent segments in Chinese interpopulation unrelated individual pairs |
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