Relationship between Fertility Traits and Kinematics in Clusters of Boar Ejaculates

The aim was to determine the relationship between kinematic parameters of boar spermatozoa and fertility rates of sow, as well as to assess the effect of sperm clusters on the fertility capacity of the ejaculate. Semen samples were collected from 11 sexually mature boars. Samples were analyzed by an...

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Bibliographic Details
Published in:Biology (Basel, Switzerland) Switzerland), 2021-06, Vol.10 (7), p.595
Main Authors: Barquero, Vinicio, Roldan, Eduardo R. S., Soler, Carles, Vargas-Leitón, Bernardo, Sevilla, Francisco, Camacho, Marlen, Valverde, Anthony
Format: Article
Language:English
Subjects:
Accuracy
Artificial insemination
Breeding success
CASA-Mot
cluster
Experiments
Fertility
Genetic crosses
Hogs
Kinematics
Laboratories
Litter size
Motility
Semen
sows
Sperm
Velocity
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Summary:The aim was to determine the relationship between kinematic parameters of boar spermatozoa and fertility rates of sow, as well as to assess the effect of sperm clusters on the fertility capacity of the ejaculate. Semen samples were collected from 11 sexually mature boars. Samples were analyzed by an ISAS®v1 CASA-Mot system for eight kinematic parameters. Ejaculate clusters were characterized using multivariate procedures, such as principal factors (PFs) analysis and clustering methods (the k-means model). Four different ejaculate clusters were identified from two kinematic PFs which involved linear trajectory and velocity. There were differences (p < 0.05) between the sperm kinematic variables by sire line. There was no statistical difference (p > 0.05) between dam lines and ejaculate clusters in fertility variables. The discriminant ability of the different kinematics of sperm variables to predict litter size fertility was analyzed using receiver operating characteristics (ROC) curve analysis. Curvilinear velocity (VCL), average path velocity (VAP), amplitude of lateral head displacement (ALH), and beat-cross frequency (BCF) showed significant, albeit limited, predictive capacity for litter size fertility variables (range: 0.55–0.58 area under curve, AUC). The kinematic analysis of the ejaculates in clusters did not have a predictive capacity for litter size variables.
ISSN:2079-7737
2079-7737
DOI:10.3390/biology10070595