Whole-genome analysis reveals genetic diversity and selection pressure in Sichuan donkey
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View abstract on PubMed
Summary
This summary is machine-generated.Sichuan donkeys show high genetic diversity and a pure lineage, suggesting adaptation to high-altitude environments. The gene EGLN3 is identified as a key factor in their cold and hypoxic adaptation.
Area Of Science
- Animal Genomics
- Population Genetics
- Adaptation Biology
Background
- Sichuan donkeys are native to harsh plateau regions in China.
- They possess unique genomic traits due to adaptation to cold and hypoxia.
- Previous genome-wide studies on Sichuan donkeys were lacking.
Purpose Of The Study
- To analyze the population structure, genetic diversity, and differentiation of Sichuan donkeys.
- To identify genes related to high-altitude adaptation in Sichuan donkeys.
- To understand the genomic landscape of Sichuan donkeys.
Main Methods
- Whole-genome sequencing of 17 Sichuan donkeys.
- Combined data with 99 individuals from 9 other donkey breeds.
- Population genetics analyses including genetic diversity, differentiation, and selection signatures (θπ, CLR, FST, θπ-ratio).
Main Results
- Sichuan donkeys exhibit high genetic diversity and a pure lineage, with minimal foreign breed hybridization.
- They are genetically closest to Tibetan and Yunnan donkeys.
- Candidate genes for hypoxia (EGLN3, RORA, CACNA2D3) and cold adaptation (NCOA2, SLC1A1, PAM, PLPPR1, ZNF668) were identified.
- EGLN3 showed altitude-dependent variations, indicating its role in adaptation.
Conclusions
- This study clarifies the genetic diversity and differentiation of Sichuan donkeys.
- Findings enhance understanding of high-altitude adaptation in Sichuan donkeys.
- Provides valuable data for conservation and breeding strategies for this breed.
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