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Inbreeding patterns and genetic diversity under selection in Teha sheep
Shunzhe Wang1, Long Liang1, Dilinigeer Ziyayiding1
1Key Laboratory of Animal Biotechnology of Xinjiang, Key Laboratory of Genetics Breeding and Reproduction of Grass Feeding Livestock, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Institute of Biotechnology, Xinjiang Academy of Animal Science, Urumqi, China.
Frontiers in Genetics
|July 14, 2025
Summary
Teha sheep exhibit low inbreeding and moderate genetic diversity, according to integrated pedigree and genomic analyses. Key genes identified on chromosome 2 influence growth and adaptability, crucial for sustainable breeding programs.
Area of Science:
- Livestock genetics
- Animal breeding
- Population genomics
Background:
- Teha sheep, a Texel-Kazakh crossbreed, are vital for Chinese meat production.
- Their genetic structure and inbreeding levels require detailed investigation.
- Understanding genetic diversity is key for livestock sustainability.
Purpose of the Study:
- To evaluate inbreeding coefficients in Teha sheep.
- To assess genetic diversity and identify selection signatures.
- To integrate pedigree and genomic data for comprehensive analysis.
Main Methods:
- Analysis of pedigree data from 2,652 individuals.
- Genomic data analysis of 1,271 individuals.
- Identification of runs of homozygosity (ROH) hotspots and associated genes.
Main Results:
- Low inbreeding coefficient (FPED = 0.001) from pedigree data.
- Average inbreeding coefficient (FROH = 0.044) from genomic data.
- Moderate genetic diversity (Ho = 0.347, PIC = 0.345) and identified ROH hotspot on chromosome 2 with key genes (e.g., MSTN, CYFIP1).
Conclusions:
- Teha sheep possess low inbreeding and moderate genetic diversity.
- Integrated genomic and pedigree analyses support sustainable breeding.
- Identified genes provide targets for optimizing Teha sheep productivity and adaptability.
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