Fertility in the stallion as accessed by the spermatozoa morphology

Ciência Rural

Pimentel, Cláudio Alves¹  Dietrich, Giovani¹  Hammes, Anelise Maria² 

[1] Universidade Federal de Pelotas, Pelotas, Brazil;Universidade Federal de Pelotas

关键词: stallion;    semen;    fertility;    spermatozoa;    morphology;   

DOI  :  10.1590/S0103-84781997000400025

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

In a breeding farm, 129 mares were bred to 4 stallions and had an overall pregnancy rate of 76.7%. Stailions were submitted to semen examination for at least two times at the beginning of the breeding season and the percentage of morphologically normal spermatozoa were used for statistical analysis in relation to the percentage of pregnancy at the end of the breeding season. A regression analysis revealed that the percentage of pregnancy (y) can be estimated by the percentage of normal spermatozoa (x) in the ejaculate according to the following equation: y=52.38+0.44x; r2=97.8%; P<0.01. We concluded that the pregnancy rate can be estimated by the percentage of morphologically normal spermatozoa in the ejaculate of stallions, since it is an importam characteristic of the semen quality that is strongly associated with fertility, in conditions of uniform management procedures for mares and stallions.

【 授权许可】

CC BY-NC