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[PHYSIOLOGICAL RELATIONSHIP OF ERYTHROCYNE ANTIGENS WITH INDICATORS OF HORSE SPERMOGRAM].

A V Tkachev, V I Sheremeta, O L Tkacheva

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    Erythrocyte antigen alleles in Ukrainian horses influence sperm quality. Blood group D alleles significantly impact ejaculate volume, sperm activity, concentration, and abnormalities, affecting overall reproductive health.

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    Area of Science:

    • Animal genetics
    • Reproductive biology
    • Veterinary science

    Background:

    • Erythrocyte antigens (blood groups) are genetically determined.
    • Spermogram parameters are crucial indicators of male fertility.
    • Understanding genetic influences on sperm quality is vital for animal breeding.

    Purpose of the Study:

    • To investigate the relationship between erythrocyte antigen alleles (blood groups A, C, D, K) and spermogram parameters in Ukrainian selection horses.
    • To identify specific blood group alleles that correlate with variations in semen quality.

    Main Methods:

    • Analysis of erythrocyte antigen alleles in horses.
    • Evaluation of key spermogram parameters: ejaculate volume, sperm activity, concentration, and pathological forms.
    • Statistical analysis to determine correlations between blood group alleles and sperm parameters.

    Main Results:

    • Blood group D alleles showed the strongest correlation with ejaculate volume (0.36), sperm activity (0.31), concentration (0.43), and abnormal sperm forms (0.27).
    • Specific alleles within blood group D were associated with decreased, average, or high semen activity.
    • Blood group C alleles (a/-) tended to increase semen concentration, while blood group K alleles (a/-) potentially decreased it.
    • Blood groups A, C, and K had minimal correlation (≤0.07) with the studied sperm parameters.

    Conclusions:

    • Erythrocyte antigen alleles, particularly those of blood group D, significantly influence key spermogram parameters in Ukrainian horses.
    • Blood group genotyping can provide insights into potential fertility variations in stallions.
    • Further research can explore the specific mechanisms linking blood group genetics to reproductive efficiency.