The effect of breed, boar and season on some properties of sperm (original) (raw)
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Biotehnologija u stocarstvu, 2013
The main objective of this study was to evaluate the effect of age (A) and the intensity of the boars' utilization (s) on the phenotypic variability of ejaculate volume (VOL) and sperm motility (MO). The study included 274 ejaculates of Large White boars (LW). Boars were divided into six classes according the age when the ejaculate was taken (10-13, 14-17, 18-21, 22-25, 26-29 and ?30 months). Semen samples were analyzed during four seasons (spring, summer, autumn, winter). The intensity of the use of boars was seen as the impact of the group (class) of intervals between two successful collections (I; ? 5 , 6, 7 , 8, 9-10, 11-13, 14-21 days). Data processing was performed using the GLM procedure using the statistical package SAS 9.1.3 (SAS Inst. Inc., 2002-2003). Average values of VOL, MO, I, A, were: 178.94 ml, 90.35%, 9.37 days and 655.93 days. The effect of boars on both studied sperm traits was highly significant (p<0.001). The volume of ejaculate varied under the influenc...
Effect of breed of performance tested boars on ejaculate traits
2020
The main objective of the study was to determine the influence of breed on the traits of boar ejaculate: ejaculate volume (VOL, ml), sperm concentration (CON, x106 sperm/ml), total sperm count in ejaculate (TNS, x109 spermatozoa), sperm motility in native ejaculate (MON, %), sperm motility after dilution (MOD, %) and number of doses produced (NPD). The aim was also to evaluate the correlation of the boar performance test traits: average life daily gain (g), backfat thickness measured in two locations (mm), depth of longissimus dorsi muscle (mm) and carcass meat content (%) with ejaculate traits. Total of 931 ejaculates of 36 boars during reproductive exploitation were analysed (16 Landrace boars and 20 Large White boars). The effect was assessed using the procedure of the general linear model of the statistical package SAS 9.1.3 (SAS Inst. Inc., 2002- 2003). The model for analysis included the influence of breed, season and the linear regression influence of body weight at the end o...
The Dynamic of Main Indices of Spermiogram at Boars, in Function on Some Factors of Influence
Breeding boars used for semen production. This is conditioned by many factors. The research aim was to assess the some indices of spermogram (volume, mobility, concentration, total sperm / ejaculate) at 21 boars, the breeds Large White, Landrace, Duroc and Pietrain in relation with some factors of influence: the race, age, individual and harvesting season. The age of boars was between 8 months and 30 months. The rhythm of harvesting was following: one harvesting followed by the five days break. Depending on the breed, were differences for volume (183,5± 4,88 ml at Pietrain boars and 256±5,3 ml at Landrace boars) and for concentration (309,7±6,0 millions/ml at Duroc boars and 430,7±9,3 millions/ml at Pietrain boars). In function on the season, semen volume varied insignificant between summer (minimum values: 188.4 ± 5.6 ml) and winter (maximum values: 222.1 ± 6.6 ml). The spermatozoon concentration was insignificantly influenced by the season (371.6 ± 11.7 million/ml -summer; 399.4 ±...
118 the Influence of the Seasonality on Boars Sperm Production-Breeder of Different Species
2016
The goal of the research was to give comparative evaluation of the sperm quality of boars from four breeds: Landrace, Yorkshire, Pietrain and Duroc in accordance with the seasons of the year. The research took place within State Enterprise on Raising and Pig Cross Breeding “Moldsiungibrid” in 2013. The results of the comparative evaluation demonstrated that based on ejaculate content, average per year, better results showed the Landrace and Yorkshire breed boars (255.61 and 276.11 ml); lower ejaculate content had Pietrain breed boars – 253.35 ml and Duroc – 214.27 ml. Semen obtained in one ejaculation from Yorkshire breed boar, has the capacity to bred 11 sows, with Landrace and Pietrain – 10 sows and with the Duroc breed boar semen – 8 sows (on dilution 1:4). It was found that, boars sperm production depends on the seasons of the year: the ejaculate content of Landrace breed boars was lower by 14.84 ml in autumn than in winter and summer; in the case of Pietrain breed boars, it var...
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego, 2018
The aim of the research was to determine the dependence of physical properties of boar ejaculates on the time interval between successive ejaculate collections. The material for the study comprised 1954 ejaculates collected manually from boars used for artificial insemination. For all ejaculates, the ejaculate volume, sperm concentration, percentage of motile spermatozoa, and number of spermatozoa in the ejaculate were determined, and the number of insemination doses per ejaculate was calculated. The boars’ suitability for artificial insemination was evaluated taking into account the effect of the time passed between ejaculate collections. The ejaculate volume and the concentration and number of sperm in the ejaculate were shown to increase with the time elapsed since the previous ejaculate. The number of insemination doses obtained per ejaculate increased as well. Ejaculates with a high sperm count were obtained when the ejaculation frequency was no more than every 4 days. The perc...
Journal of Veterinary Research
Introduction Determination of sperm concentration and morphology in ejaculate is essential in evaluating fertility. Sperm shape and dimensions may depend on their concentration in ejaculate. The aim of the study was to evaluate the dependence of Hypor boar morphological and morphometric sperm characteristics on concentration in ejaculate. Material and Methods The study was conducted on 120 ejaculates from 12 Hypor boars. Depending on sperm concentration, they were put into three groups: low, medium, and high. Ejaculate sperm concentration was determined with the photometric method. Slides were prepared from semen samples which were evaluated for the morphology of spermatozoa. The preparations for morphological analyses were by the eosin-gentian staining method. Results As the sperm concentration in the ejaculate increased, the length, perimeter, and area of the sperm heads also did. In the ejaculates with higher sperm concentration the sperm heads were rounder. The ratios of head di...
Ejaculate traits and sperm morphology depending on ejaculate volume in Duroc boars
Journal of Veterinary Research
The aim of this study was to evaluate the dependence between ejaculate traits, sperm morphology, and ejaculate volume in Duroc boars.The analysis involved 121 ejaculates collected from 12 Duroc boars kept in three artificial insemination centres located in central Poland. Ejaculates were collected manually at one-month intervals, over a period of 10 months. At least 10 ejaculates were collected from each boar. The material was divided by ejaculate volume and each ejaculate was assigned to one of three volume groups: 160 mL and lower, 161–200 mL, and 201 mL and higher. The ejaculates were assessed to identify the basic physical traits and determine the incidence of morphological abnormalities in the spermatozoa, specifying major and minor abnormalities. Furthermore, the morphological structure indices for the spermatozoa were also calculated.In large-volume ejaculates, spermatozoa were more elongated in shape, their heads were more elongated and had the largest flagella. With an incr...
Acta veterinaria, 2013
The experiments were performed on 448 ejaculates obtained from 41 Polish Landrace boars. Ejaculates collected from each boar at one-month intervals for approximately 10 months were analysed. Sperm morphometric measurements were taken from each boar and assessment of semen morphology was done on the basis of examination under a microscope of preparations made from fresh ejaculates. The ejaculates were classified based on the criterion of sperm concentration and divided into three groups. An attempt was made in the present study to assess the correlation of ejaculate parameters, morphological sperm alteration incidence and morphometric sperm parameters with the sperm concentration in ejaculates of Polish Landrace boars. It should be stated that morphometric traits of spermatozoa are related to sperm concentration. The spermatozoa in concentrated ejaculates had smaller heads than the spermatozoa in the ejaculates with lower sperm concentrations. This can mean that the high fertility of males that produce highly concentrated semen does not only result from a high sperm concentration, but also from the fact that the spermatozoa in such ejaculates have smaller heads. The highest frequency of morphologically well-formed spermatozoa was identified in ejaculates with the sperm concentration ranging from 400 to 500 thousand/mm 3 .
TURKISH JOURNAL OF VETERINARY AND ANIMAL SCIENCES
Introduction Porcine ejaculate performance and semen quality depend on factors such as age, breed, feeding and nutrition, housing conditions, animal care, the way the semen is collected, and many others (1,2). Libido also affects ejaculate traits (3). Reproductive performance of artificial insemination (AI) in boars stems largely from semen quality, which is a function of the incidence of sperm cell morphological abnormalities (4). Besides the semen quality, the AI value of semen is additionally influenced by sperm morphometric features, their sizes, and shapes (5). One of the methods used to assess the biological value of semen and its suitability for inseminating females is examination of sperm morphology (6). In AI practice cases of reduced male fertility are observed. This may be due to seasonal factors such as temperature, humidity, and light intensity (1). The occurrence of seasonal variation in the frequency of morphological sperm anomalies may depend on the breed of pig (2). This is because of varying degrees of sensitivity among breeds to the effects of seasonal factors (7). The aim of this study was to determine the effects of seasonal factors on ejaculate physical traits and sperm morphology in Hypor boars and to establish correlations between some semen traits and year seasons. 2. Materials and methods The analysis involved 114 ejaculates collected from 12 Hypor boars utilized in three AI centers located in central Poland. Geographically the area ranges between latitudes 51°60′N and 52°50′N and between 19°10′E and 20°30′E. The average altitude of the area is 109 m above sea level. Four calendar-based seasons of the year were considered:
Assessment of boar semen parameters
2013
Normal morphology, high motility and viability are sperm characteristics that ensure a good fertilizing capacity, being considered crucial for sexing technology. The purpose of this study was to evaluate semen parameters and to estimate its suitability for subsequent sperm sexing. We analyzed five ejaculates (concentration, morphology, motility and viability) from one boar using different computerized analysis systems. The results showed that all 5 sperm ejaculates were suitable for use in the sexing processes and the methods of analysis used were fast and appropriate for evaluating semen characteristics.