This experiment was conducted to separate X-and Y-bearing spermatozoa of boar semen. The ratio of X-and Y-bearing spermatozoa to total spermatozoa included in ejaculated semen obtained from 4 boars raising at the College of Agriculture, Seoul National University and treated by the sedimentory or electrophoretic technique was estimated. For the electrophoresis, the semen specimen was placed into the co, pp.r loop electrodes in 30cc of glass tube at room temperature for 30 minutes and in order to sedimentary separation, the semen was sedimented in 5$^{\circ}C$ water for 50 minutes. The sperm fluorescent stainning technique was performed by the method of Bhattacharya etal (1976). The results obtained were as follows; 1. Average rate of B-body bearing spermatozoa in normal boar semen was 45.15${\pm}$4.20%, and no significant difference was observed between 1st (44.88${\pm}$6.41%) and 2nd (42.75${\pm}$4.17%) fraction of fractionally collected semen. 2. Spermatozoa were separated into several different fractions by sedimentation. B-body a, pp.arances from the top and bottom fraction were 53.70% and 33.43%, respectively. There were highly significant difference between the top and bottom fractions. 3. The swine spermatozoa were separated into X-and Y-bearing spermatozos by electrophoresis without interferring the sperm motility. The rates of B-body bearing spermatozoa attracted on the anode and cathode were 60.4% and 21.8%, respectively. Highly significant difference betwee two fractions was also observed.
There were two trials involved in the experiment. Trial 1: the trial was conducted on two Taiwan Sugar Corporation (TSC) pig farms. One was located in the north of Taiwan and the other was located in the south. Both farms had wet pad and forced ventilation (WPFV) and conventional open design (COD) boar and sow houses. There were 12 Duroc boars, age ranging from 12-24 months. Half of them (6 boars) were raised in a WPFV pig house, and the other half were kept in a COD house. Semen was collected at 5-day intervals from May $1^{st}$ to the end of October. Sixteen sows (2-8 parity) were served by artificial insemination each week from the beginning of May to the end of Oct. These sows were checked for heat from 18 days to 25 days after insemination. Trial 2: there were four MPFV boar houses involved in the test. Two houses were located in the north of Taiwan, and the other two houses were located in the south. The test was conducted from January 2000 to December 2001. The total number of serviced sows by MPFV-housed boars was 35,105 head and for COD-housed boars 103,065 head. The results showed that the total semen volume, density of sperm, total sperm per ejaculate, sperm motility and morphological abnormality were significantly better (p<0.01) for boar raised in WPFV house than for COD houses. Average sperm motility in June and July was lower than for the other months. Morphological abnormality was higher during May, June and July. Although the results did not reach a significant level, the average value showed that the total volume of boar semen was higher in the north than for the south. The total semen volume production of boar raised in WPFV was higher than for boars raised in COD house, reaching a significant level only in summer. Boars kept in WPFV house had higher total sperm number than boars kept in COD house, reaching a significant level in spring (p<0.05), summer (p<0.01), and fall (p<0.05) but not in winter (p>0.05). Boars raised in WPFV house had significantly higher sperm motility than boars in COD house during spring (p<0.001), summer (p<0.001), fall (p<0.01) and winter (p<0.05). The average farrowing rate and piglets born alive were higher for boars in WPFV house than for boars in COD house, but neither reached a significant level (p>0.05). The present experiment shows that WPFV house can improve the reproduction performance of boars.
To evaluate the fertilizing capacity of domestic animal spermatozoa by hamster test, semen were collected from 15 boars(Duroc, Landrace, and Yorkshire) and 2 mixed dogs which had been proved to be fertile in the past then, the semen were preserved in BWW medium at $4^{\circ}C$ or $18^{\circ}C$ for about 20 hours and coincubated with zona-free hamster ova for 5 hours. The ova were stained by lacmoid and examined under phase contrast microscope to investigate the rates of sperm binding to the ova, penetration and formation of a male pronucleus, and the numbers of both bound and penetrated sperm per ovum. Both the semen preserved at $18^{\circ}C$ for about 20 hours and that treated by swim up procedure showed considerably higher rates of sperm binding and penetration as well as higher number of penetrated sperm than that preserved at $4^{\circ}C$ for about 20 hours, respectively(p<0.01). Motility of boar sperm at insemination was from 40 to 90% and no difference in hamster test was obtained according to different degree of sperm motility. Abnormality in morphology of boar sperm at insemination was from 6 to 45% and no difference in hamster test was obtained according to different degree of sperm abnormality. The sperm concentrations of $7{\times}10^7$ and $7{\times}10^6$ showed considerably higher rates of sperm binding and penetration as well as higher number of bound sperm than that of $7{\times}10^4$ (p<0.01) along with the same higher results than that of $7{\times}10^5$(0<0.05), respectively. Boar sperm showed considerably higher rates of sperm binding and penetration as well as higher numbers of both bound and penetrated sperm than dog sperm, when both semen were treated by BWW+heparin medium and swim up procedure, respectively. These results indicated that fertile boar sperm showed considerably lower rates in the results of hamster test, when preserved at $4^{\circ}C$ for about 20 hours and in lower concentration of sperm than when preserved at $18^{\circ}C$ for about 20 hours and in higher concentration of sperm, respectively, and at the same time considerably higher results than fertile dog sperm, consequently to prove that hamster test would be of great value in assaying the fertilizing capacity of boar sperm.
Kim, C.K.;Kim, I.;Y.C. Chung;J.W. Ryu;H.J. Yoon;K. Kang;Kim, I.C.;Lee, J.H.;S.E. Yeon
Proceedings of the KSAR Conference
/
2001.03a
/
pp.86-86
/
2001
The aims of this work were to determine the acrosin activity and to evaluate the structural and functional integrity of AS boar spermatozoa. The acrosin activity of spermatozoa were 5.40, 4.10 and 3.40 mIU/10$^{6}$ sperm in raw, extended and frozen semen respectively , which differed significantly each other (P<0.05). After the raw and extended semen were exposured to cold and thermal shock, the acrosin activities of spermatozoa in the raw semen were 5.39, 5.21 and 5.29 mIU/10$^{6}$ sperm for control (non-shock), cold shock and thermal shock, and those of extended semen were 4.21, 3.98 and 4.00 mIU/10$^{6}$ sperm. This value among treatments did not differ significantly. The acrosin activities of spermatozoa in the extended and stored semen were 3.27, 3.52, 3.46 and 3.23 mIU/10/suup 6/ sperm, while hypo-osmotic test(HOST) values were 56.5%, 64.7%, 66.0% and 56.0%, following 4 days storage at 4$^{\circ}C$, 17$^{\circ}C$ , $25^{\circ}C$ and 37$^{\circ}C$, respectively. The results at 17$^{\circ}C$ and $25^{\circ}C$ appeared to be best compared with the other storage temperatures.
This experiment was carried out to investigate the effects of saccharide in the lactose-egg yolk(LEY) extender for freezing of boar semen on the viability, normal acrosome, fertilizable of in vitro or in vivo oocyte after thawed. Normal acrosome post-thawed spermatozoa was higher when increasing of glucose concentration in LEY extender with 3 or $4\%$ glycerol, but viability was not significant. Viability of the post-thawed spermatozoa was higher when fructose or fructose and glucose were added to LEY extender with $3\%$ glycerol than glucose and sucrose or fructose, glucose and sucrose(P<0.05). Rate of normal acrosome of post thawed spermatozoa was higher when both fructose and glucose$(81.4{\pm}2.3\%)$ were added to the LEY extender than saccharide not added$(41.6\pm0.6\%)$ to it(P<0.001). The percentage of fertilization, cleavage and development to blastocyst of oocytes fertilized with post-thawed spermatozoa from freezing by LEY extender were $70.8\~80.7\%$, $44.6\~45.7$ and $13.6\~16.0\%$, respectively. Conception rate by artificial insemination with frozen boa. semen was higher$(83.1{\pm}0.3\%)$ than commercial frozen semen from SGI company$(50.0{\pm}0.1\%,\;P<0.05)$, but litter size were no significant differences between frozen by LEY extender$(9.4{\pm}1.7\~10.4{\pm}0.7head/sow)$ and SGI semen$(8.0{\pm}1.1 head/sow)$.
A series of experiments were conducted to determine the suitable freezing and thawing temperatures for the freezing of boar semen in 5 ml maxi-straws. The ultrastructure, in vitro fertilization (IVF) and artificial insemination (AI) of frozen-thawed semen were also be evaluated. The 5 cm freezing height gave the best results not only in post-thaw motility rate (54.00%), but also in normal acrosome morphology rate (NAR) (80.23%). There was no significant difference in the post-thaw motility between different thawing temperatures and corresponding thawing times (p>0.05); the group of $52^{\circ}C$ and 25 s gave the highest motility rate (45.00%). As a whole, not only from the motility but also the NAR, thawing at $42^{\circ}C$ was better than the other two treatments. In the freezing packages, 5 ml maxi-straw gave a little lower mobility (40%), viability rate (49.58%), plasma membrane integrity rate (53.91%) and NAR (52.65%) than the 0.25 ml straw, but there was no significant difference between the two straw volumes (p>0.05). The IVF capacity of frozen-thawed semen in this experiment was similar to fresh semen. From ultrastructure observation, the main damage to boar spermatozoa after freezing was seen in the acrosome, such as swelling and formation of vesicles. After AI in recipient Shanghai White sows, frozen-thawed semen from 5 ml maxi-straws and pellets produced 72.2% and 80% conception rate and 7.8 and 8 litter sizes, respectively, and there was no significant difference between the 5 ml maxi-straw and the pellet (p>0.05).
The boar sperm has more lipid droplets and specialty of seminal plasma compared with other species, causing difficulties of freezing sperm and decreases for the utilization of frozen semen into the artificial insemination. However, several studies reported significant results for the recovery of sperm motility and reproductive by addition of cryoprotectants and seminal plasma after thawing. This study was designed to investigate the effects of supplementation of trehalose or glycerol in the LEY (lactose and egg yolk in BTS) solution for the conventional freezing and vitrification process. Two boars aged 16 months were used to collect semen for 2 times in a week. The samples were allotted to 3 freezing solutions (LEY + glycerol 10.5% + OEP 1.5%, LEY + trehalose 1M + OEP 1.5%, and sucrose 1.5M + trehalose 1 M + OEP 1.5%) after centrifugation at 800 g for 10 minutes. Semen was equilibrated in freezing solutions for 10 minutes and injected into plastic straws with 2~3 air bubbles to minimize freezing damages. Vitrification was performed to locate sperm in 5 cm above $LN_2$ for 5 minutes, and the conventional freezing was conducted with an automatic freezer. Motility and survival rates were measured by CASA (Computer assisted sperm an alyzing system) and FITC (Fluorescein isothiocyanate), respectively after thawing semen at $50^{\circ}C$ for 12 seconds. The results were analyzed by ANOVA with STATVIEW statistical program. The vitrificatioin solution (LEY + 10.5% glycerol + 1.5% OEP) presented higher motility (20.9%) than other solutions while the solution (LEY + 1M trehalose + 1.5% OEP) showed the lowest (motility : 5.2%). However, survival rates of vitrified sperms detected by FITC showed 1~4% live sperms in almost of dead sperms at all vitrification solutions' groups, but survival rate of freezing solution of LEY + 1M trehalose + 1.5% OEP LEY and LEY + 10.5% glycerol + 1.5% OEP were showed 49%, and 79%, respectively. There were differences (P<0.05) survival rate of conventional freezing in LEY + 10.5% glycerol + 1.5% OEP and LEY + 1M trehalose + 1.5% OEP and the remaining showed no differences. The results suggested that vitrified boar semen was not enough to be utilized for the artificial insemination, but it showed possibility to utilize for ICSI and conventional freezing with glycerol would be useful method for artificial insemination in pig while we choose the outstanding semen against tolerance to freezing damages.
This experiment was carried out to investigate the effect of bovine serum ablumin (BSA), sugars, glycerol equilibration time, straw size and thawing method on the survival index and the morphology of frozen boar spermatozoa. The results obtained were summarized as follow: 1. When the semen frozen in BF5 dilutor as pellet form was thawed in BTS at 37$^{\circ}$and 50$^{\circ}C$, BF5 dilutor with fructose showed higher sperm survival index than that with dextrose, however, when the semen was thawed on dry test tube at 37$^{\circ}C$, BF5 dilutor with sucrose showed higher sperm survival index than with other sugars. 2 When the semen forzen in BF5 dilutor with straw and thawed at 37$^{\circ}C$, BF5 dilutor with dextrose showed higher sperm survival index than those with other sugars, and there was no difference in sperm survival index between 0.5 and 1.0 ml straws. 3. The sperm survival index of frozen sperm was significantly (P<0.05) improved due to addition of BSA (0.05%) to BF5 dilutor. 4. When the extended semen with BF5 dilutor contatining 0.01 to 0.05% of BSA was frozen in the straw, the semen without glycerol equilibration showed significantly (P<0.05) higher sperm survival index than those with 2, 4 and 6 hrs glycerol equilibration time. 5. The sperm frozen in BF5 dilutor with dextrose or fructose, sucrose and raffinose showed 77 to 88% in normal acrosome rate and no difference among sugars. 6. The frozen semen showed lower normal acrosome rate than the first and second diluted semen, whereas the frozen semen showed higher swollen, damaged and missing acrosome rate than the first and second diluted semen. 7. Damaged and missing acrosome rate of sperm head due to freezing was somewhat inhibited by addition of BSA (0.01 to 0.05) to the BF5 dilutor.
Kim, In-Cheul;Park, Chang-Sik;Lee, Kyu-Seung;Seo, Kil-Woong;Han, Sung-Wook
Korean Journal of Agricultural Science
/
v.28
no.2
/
pp.85-91
/
2001
This study was carried out to investigate the effects of liquid boar semen on reproductive performance in swine artificial insemination. Many factors, which were breeds, time of insemination, breeding season, sperm per dose etc, have been tried to improve reproductive efficiency. Boars were raised at Swine Artificial Insemination Center in National Livestock Research Institute, Sunghwan, Chungnam, Korea. This experiment was carried out from 1995 to 2000. There were no differences in the fertility results compared with 3 breeds (Landrace, Yorkshire and Duroc), frequencies of artificial insemination (double and triple) per estrus cycle and different seasons by using liquid boar semen. There were no significant differences in conception rate, farrowing rate and litter size using 4 trials of 3.0, 2.5, 2.0 and $1.5{\times}10^9/80ml$ in liquid boar semen with 70% of motile sperm cells. We confirmed that the sperm number per dose of $1.5{\times}10^9/80ml$ could be used for commercial artificial insemination.
The objective of this study was to see if fairly simple magnetic nano-particle treatment enhances boar semen qualities. Boar semen samples were prepared from the swine AI center and samples were divided by 4 different motility groups (1, >90%; 2. 80~90%; 3. 70~80%; 4. <70%) using computer assisted sperm analysis (CASA) evaluation. Boar semen was extended using BTS extender and same number of magnetic nano-particles as total number of spermatozoa in each sample was treated for 20 min and collected for 5 min at room temperature. Sperm qualities such as motility and viability were evaluated by the CASA before and after treatment. Sperm abnormality and degree of agglutination were also evaluated under the microscopic examination before and after treatment. There were significant changes (p<0.05) on sperm motility from all 4 different groups in the average of 7.11% after treatment. The enhancement of sperm motility changes was more clear in the groups of lower sperm motile groups (<70% and 70~80%; 19.12±1.08% and 5.67±0.71%, p<0.05). The sperm motility character in terms of curvilinear velocity (VCL), straight line velocity (VSL), average path velocity (VAP) and linearity (LIN, %) showed also similar pattern but motility enhancement wear more clear in below 70% motile group. Average sperm viability was increased to 4% by magnetic nano-particles (p<0.05). The percentage of sperm abnormality was also reduced significantly (p<0.05) to the range of 3.7~4.5% before after treatment. The degree of sperm agglutination was also reduced in lower motility groups by the magnetic nano-particle purification.
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