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Correlation between objective semen analysis and fertility in Japanese quail
Umar Farooq1, Irek A Malecki2, Misbah Mahmood3
1School of Agriculture and Environment, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia; The UWA Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia; Department of Poultry Science, Sub Campus Toba Tek Singh, University of Agriculture Faisalabad, 36050, Pakistan.
Theriogenology
|April 29, 2018
Summary
Semen traits like sperm concentration and motility (Medium%, PROG%, VAP, VSL, BCF) predict Japanese quail fertility. Early week 8 measurements can identify low-fertility males, aiding breeding programs.
Area of Science:
- Animal Science
- Reproductive Biology
- Avian Genetics
Background:
- Male fertility is crucial for efficient animal breeding.
- Predicting male fertility based on semen traits can optimize selection processes.
- Japanese quail are a valuable model for avian reproductive studies.
Purpose of the Study:
- To investigate the relationship between sperm kinematics and egg fertility in Japanese quail.
- To identify specific semen traits that can predict male fertility.
- To assess the potential of early-stage semen analysis for fertility prediction.
Main Methods:
- Collected ejaculates from 45 male Japanese quail across five strains (A-E) from 8 to 38 weeks of age.
- Analyzed semen volume, sperm concentration, and sperm motility using Sperm Class Analyzer (SCA®-CASA).
- Assessed egg fertility by measuring percent fertile eggs, and sperm (SpermOPVL) and sperm-holes (HolesIPVL) on the perivitelline membrane.
Main Results:
- Sperm concentration positively correlated with ejaculate volume and percent fertile eggs.
- Multiple sperm kinematic parameters (MOT%, Rapid%, PROG%, Medium%, VCL, VSL, VAP, LIN%, STR%, BCF) were highly correlated.
- Adjusted analysis revealed Medium% correlated with HolesIPVL and fertile eggs, while PROG% correlated with SpermOPVL and HolesIPVL; strain and age influenced these relationships.
Conclusions:
- Sperm concentration, Medium%, PROG%, VAP, VSL, and BCF are key determinants of Japanese quail egg fertility.
- These relationships are influenced by genetic background (genotype).
- Early semen analysis (Week 8) can identify males with poor fertility, with 30-47% accuracy confirmed by lifetime data.
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