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Updated: Jul 16, 2025

Avian Semen Collection by Cloacal Massage and Isolation of DNA from Sperm
Published on: February 5, 2018
Genome-wide association study identifies variants associated with semen volume in white-feathered broilers
1State Key Laboratory of Animal Nutrition, Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China.
Researchers identified key genes linked to rooster semen volume in white-feathered broilers. This study enhances understanding of male reproductive traits for improved broiler breeding programs.
Area of Science:
- Animal Genetics
- Poultry Breeding
- Reproductive Biology
Background:
- Rooster semen quality is crucial for broiler reproductive efficiency and economic returns.
- Previous research has largely overlooked rooster reproductive traits, focusing more on hens.
- Identifying genetic factors influencing rooster semen traits is essential for targeted breeding.
Purpose of the Study:
- To identify genes associated with semen volume in white-feathered broilers.
- To provide a genetic basis for marker-assisted selection of semen volume.
- To advance the understanding of male reproductive genetics in poultry.
Main Methods:
- Genotyping 220 white-feathered broilers using a 55K SNP chip.
- Imputing SNP data with resequencing data from 97 roosters.
- Performing genome-wide association analysis (GWAS) on semen volume using over 1 million SNPs.
Main Results:
- Identified 197 significant genome-wide markers associated with semen volume.
- Localized these markers to a specific interval (13.82–16.12 Mb) on chromosome 7.
- Pinpointed four candidate genes (FAPP1, OSBPL6, SESTD1, SSFA2) potentially influencing semen volume.
Conclusions:
- The identified genes provide a foundation for understanding the genetic architecture of rooster semen volume.
- These findings support the potential for marker-assisted selection to improve semen volume in broilers.
- Further research into these candidate genes can refine breeding strategies for enhanced poultry reproduction.
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