Differences between reproductive traits in beef bulls used for multiple-sire breeding under range conditions

2014 ◽  
Vol 94 (4) ◽  
pp. 647-652
Author(s):  
C. C. Brauner ◽  
L. M. Menezes ◽  
J. S. Lemes ◽  
M. A. Pimentel
Keyword(s):  
Bos Taurus ◽  
Semen Quality ◽  
Bos Indicus ◽  
Age Groups ◽  
Sperm Concentration ◽  
Reproductive Traits ◽  
Linear Effect ◽  
Spermatozoa Motility ◽  
Scrotal Circumference ◽  
Beef Bulls

Brauner, C. C., Menezes, L. M., Lemes, J. S. and Pimentel, M. A. 2014. Differences between reproductive traits in beef bulls used for multiple-sire breeding under range conditions. Can. J. Anim. Sci. 94: 647–652. The aim of this study was to evaluate the reproductive traits (scrotal circumference and semen quality) of different breeds of beef bulls used for multiple-sire breeding under range conditions, as well as to verify the relation between four sperm concentration scores and the reproductive traits of beef bulls. Two hundred and one bulls of three different breeds (Angus, Nelore and Brangus) and three different age groups (18, 24 and 36 mo old) were evaluated. Angus showed better (P>0.05) reproductive traits than Brangus and Nelore bulls, in which scrotal circumference, mass motility spermatozoa, motility spermatozoa, as well as spermatic vigor were greater than those of other breeds. Two-year-old bulls demonstrated better reproductive traits as compared with the other age groups. The sperm concentration score had a linear effect (P<0.01) on all reproductive traits evaluated, and the same evidence was also detected for body weight. It was concluded that genetic groups should be considered differently for multiple-sire breeding under range conditions, especially because Bos taurus and Bos indicus have significant reproductive trait differences. Moreover, the sperm concentration score can be used as an auxiliary method of semen quality in beef bulls, having a positive relation with other breeding soundness evaluation traits.

scholarly journals Influence of age on the spermiogramic parameters of native sheep

1970 ◽  
Vol 7 (2) ◽  
pp. 301-304 ◽  
Author(s):  
MR Hassan ◽  
S Pervage ◽  
M Ershaduzzaman ◽  
MAI Talukder
Keyword(s):  
Semen Quality ◽  
Age Groups ◽  
Sperm Concentration ◽  
Live Weight ◽  
Scrotal Circumference ◽  
Semen Volume ◽  
Native Sheep

The study was conducted to evaluate the qualities of ram semen in different age groups (one to four years) were evaluated. The parameters included testes length (cm), testes breadth (cm), scrotal circumference (cm), live weight (kg), semen volume (ml), PH, sperm concentration (x109), motility (%), percentage of live, dead and normal, abnormal spermatozoa of native sheep. The average semen volume (ml) found to be 0.60, 0.91, 0.85 and 0.87; sperm concentration (109/ml) 1.03, 3.27, 4.45 and 4.17 and finally motility (%) were found to be 68.07, 75.03, 75.01 and 76.25 respectively for the 1st, 2nd, 3rd and 4th year age of native ram. The effects of age on all parameters (testes length, semen volume, semen pH, sperm concentration, motility, viability, normal spermatozoa) were significant except testes breadth and scrotal circumference. The value of all of these parameters increased linearly up to three years with the increase of age except PH. The result of the present study indicated that scrotal diameter, serving capacity; normal and live spermatozoa were comparatively better during the 3rd year than the 1st and 2nd year of age while the values were almost similar at 3rd and 4th year of age. With the increasing of age, the semen quality improved and stabilized up to at the age of 3 years. Keywords: Native sheep; Spermiogramic parameter; Age DOI: 10.3329/jbau.v7i2.4738 J. Bangladesh Agril. Univ. 7(2): 301-304, 2009

Single Nucleotide Polymorphism in KiSS1 gene and its association with semen quality in Bos taurus and Bos indicus bulls

2018 ◽  
Author(s):  
P. , , Divya ◽  
K. P. Ramesha ◽  
Ragini Kumari ◽  
Arun Pratap Singh ◽  
D. N. Das ◽  
...  
Keyword(s):  
Bos Taurus ◽  
Semen Quality ◽  
Direct Sequencing ◽  
Bos Indicus ◽  
Sperm Concentration ◽  
Quality Parameters ◽  
Coding Regions ◽  
Acrosome Integrity ◽  
Live Sperm

Selection of high fertile bulls with the help of marker assisted selection has gained importance in recent years. The low heritability of fertility traits hampers improvement of these traits by conventional selection based on phenotypic records. No information is available on the role of SNPs in KiSS1 gene in cattle on semen quality parameters in bovines. KiSS1 genes code for Kisspeptin, which are essential upstream regulators of neurons secreting gonadotropin-releasing hormone and play crucial role in reproduction.The coding regions along with exon-intron boundaries of KiSS1 gene, was characterized using PCR-SSCP method and direct sequencing. Two genotypes were observed which were represented as SSCP pattern 1 and pattern 2 and found to carry one SNPs (T153C) and one insertion of G at 291_292bp. The bulls with pattern 2 were heterozygous with respect to the transition T153C and pattern1 bulls were homozygous with TT genotype. The transition was predicted to cause amino acid change from Valine to Alanine. The frequency of bulls with pattern1 and pattern 2 were 0.67 and 0.33 in 67 Holstein Friesian bulls and 0.73 and 0.27 in 13 Khillari bulls. The association study of genotypes with semen quality parameters revealed significant association of genotypes with acrosome integrity in fresh semen (P less than 0.05) and no association with sperm concentration, volume per ejaculate, percent live sperm and Hypo Osmotic Swelling Test (HOST) with higher acrosome integrity in bulls with pattern2. Upon validation of the results in larger population and identifying the exact role of the novel SNP T153C and insertion of G at 291_292bp, they could be incorporated in selection programme for improving fertility in bulls.as markers for acrosome integrity in cattle.

PSVII-29 Genetic analysis of frame score and performance traits in Nellore cattle – reproduction and productivity traits

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 238-238
Author(s):  
Fernando S Baldi ◽  
Maria Paula Negreiros ◽  
Elisa Peripolli ◽  
Claudio U Magnabosco ◽  
Nayanny Guimarães ◽  
...  
Keyword(s):  
Animal Model ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Genetic Correlations ◽  
Genetic Selection ◽  
Heritability Estimate ◽  
Reproductive Traits ◽  
Scrotal Circumference ◽  
Nellore Cattle ◽  
Cattle Reproduction

Abstract Frame score systems developed for Bos taurus breeds do not translate well for Bos indicus breeds, as these tend to be taller. We evaluated a novel frame score system for Nellore cattle raised on pasture [Guimaraes et al., 2020 J, Anim. Sci. 98 (Suppl. 4)]. Traits included adjusted scrotal circumference (cm) at 365 (SC365) and 450 (SC450) days of age, age at first calving (AFC, d), early heifer pregnancy (EHP, % calving as two-year-olds), stayability (STAY, % of cows remaining in the herd over 76 months of age, calving at least three times), and accumulated productivity (AP, kg of calf weaned per cow per year). In this study, we applied the previously developed equations (that also include hip height (HH, cm) and age to 12,049 records from the National Association of Breeders and Researchers (ANCP) database:FSmales= -20.35 + 0.1305*REA + 0.2633*BF - 0.5901*RF + 0.1139*HH + 0.0056*AGEFSfemales = -11.87 + 0.1316*REA - 0.2457*BF - 0.6218*RF + 0.1139*HH + 0.0009507*AGEThe (co)variance components and genetic parameters were estimated using a linear animal model or a threshold animal model depending on the trait. The heritability estimate for frame score was moderate (0.30). Estimated genetic correlations for reproductive traits were low to moderate (SC365, 0.06; SC450, 0.04; AFC, 0.18; EHP, -0.24; STAY, 0.06; AP, 0.25). The estimates support the notion that larger frame animals are later maturing but have greater lifetime productivity. The new frame score may be a useful tool for genetic selection of animals that are best suited to their environment.

scholarly journals Influence of Non-Genetic Factors on Semen Quality Parameters in Crossbred Jersey (Bos taurus x Bos indicus) Bulls

2018 ◽  
Vol 7 (04) ◽  
pp. 2994-3004
Author(s):  
Alagappan Gopinathan ◽  
Salem Nagalingam Sivaselvam ◽  
Sarojini Kanniappan Karthickeyan ◽  
Ragothaman Venkataramanan
Keyword(s):  
Genetic Factors ◽  
Bos Taurus ◽  
Semen Quality ◽  
Bos Indicus ◽  
Quality Parameters

scholarly journals Variation in body measurements and semen quality of Nigeria sheep breeds

2021 ◽  
Vol 48 (1) ◽  
pp. 55-61
Author(s):  
F. P. Agbaye ◽  
A. O. Sokunbi ◽  
M. A. Onigemo ◽  
O. Alaba ◽  
O. A. J. Anjola ◽  
...  
Keyword(s):  
Semen Quality ◽  
Sperm Concentration ◽  
Small Ruminants ◽  
Body Measurements ◽  
Morphometric Traits ◽  
Sheep Breeds ◽  
Scrotal Circumference ◽  
Body Weights ◽  
Qualité Du Sperme

small holder farmers enjoy in rearing small ruminants however, there are paucity of information on the morphometric traits and semen characteristics of Nigeria breeds of sheep in Ikorodu. Therefore, the effects of breeds on body measurements and semen quality of four sheep breeds in Nigeria were assessed. Twenty matured rams aged 2½ years and weighed 31.13±4.8 kg comprising five rams per breed namely: Balami (BAL), Ouda (UD), Yankasa (YAK) and West African Dwarf (WAD) were used for the study. Body measurements and semen quality of each ram was assessed for a period of six weeks after the four weeks of acclimatization. Live body weights (LBW), scrotal circumference (SC), height at wither (HtW), rump length (RpL) and rectal temperature (RT) were evaluated for body parameters. Semen samples were collected using electro-ejaculation method and evaluated for semen volume (SV), progressive sperm motility (PSM), sperm concentration (SC), normal sperm morphology (NSM), sperm livability (SL), and sperm acrosome integrity (SAI) using standard procedures. Results revealed that Yankasa had significantly (p<0.05) the higher live body weights (38.33kg) Live body weights while WAD recorded the least live body weights (28.50kg) live body weights which, was similar (p>0.05) with values recorded for Balami (28.67kg) and Ouda(29.0kg) breeds. Scrotal circumference was significantly (p<0.05) the lowest (24.50cm) in WAD but were similar (p>0.05) in Ouda (28.00cm), BAL (27.67cm) and YAK (26.33cm). The HtW showed similar trend with scrotal circumference. Meanwhile, there were no significant variation (p>0.05) in the value recorded for RpL (cm) and RT (0C). While, PSM, SAI and SV for all the breeds of sheep were statistically similar (p>0.05) in values and SC, SL and SNM were statistically different (p<0.05) between breeds.     La petite taille corporelle, la capacité de production élevée et les taux de croissance rapides des moutons sont des caractéristiques remarquables que les petits exploitants agricoles apprécient dans l'élevage de petits ruminants, cependant, il y a peu d'informations sur les traits morphométriques et les caractéristiques du sperme des races de moutons du Nigeria à Ikorodu. Par conséquent, les effets des races sur les mésures corporelles et la qualité du sperme de quatre races de moutons au Nigéria ont été évalués. Vingt béliers matures âgés de 2 ans et demi et pesant 31,13 ± 4,8 kg comprenant cinq béliers par race à savoir: Balami (BAL), Ouda (UD), Yankasa (YAK) et mouton nain de l'Afrique de l'Ouest (WAD) ont été utilisés pour l'étude. Les mesures corporelles et la qualité du sperme de chaque bélier ont été évaluées pendant une période de six semaines après les quatre semaines d'acclimatation. Les poids corporels vivants (LBW), la circonférence scrotale (SC), la hauteur au garrot (HtW), la longueur de la croupe (RpL) et la température rectale (RT) ont été évaluées pour les paramètres corporels. Des échantillons de sperme ont été collectés à l'aide de la méthode d'électro-éjaculation et évalués pour le volume de sperme (SV), la motilité progressive des spermatozoïdes (PSM), la concentration de spermatozoïdes (SC), la morphologie normale des spermatozoïdes (NSM), l'habitabilité des spermatozoïdes (SL) et l'intégrité des acrosomes du sperme (SAI) en utilisant des procédures standard. Les résultats ont révélé que Yankasa avait significativement (p <0,05) les poids corporels vivants les plus élevés (38,33 kg), tandis que WAD a enregistré les poids corporels vivants les moins élevés (28,50 kg) qui étaient similaires (p> 0,05) avec des valeurs enregistrées pour les races Balami (28,67 kg) et Ouda (29,0 kg). La circonférence scrotale était significativement (p <0,05) la plus basse (24,50 cm) dans le mouton nain de l'Afrique de l'Ouest mais était similaire (p> 0,05) chez Ouda (28,00 cm), BAL (27,67 cm) et YAK (26,33 cm). La hauteur au garrot (HtW) a montré une tendance similaire avec la circonférence scrotale. Pendant ce temps, il n'y avait pas de variation significative (p> 0,05) dans la valeur enregistrée pour la longueur de la croupe (RpL) (cm) et la température rectale (RT) (0C). Alors que PSM, SAI et SV pour toutes les races de moutons étaient statistiquement similaires (p> 0,05) en valeurs et SC, SL et SNM étaient statistiquement différents (p <0,05) entre les races.

scholarly journals 294EFFECTS OF LONG DAYLIGHT ON CAPRINE SCROTAL CIRCUMFERENCE AND SEMEN QUALITY

2004 ◽  
Vol 16 (2) ◽  
pp. 267
Author(s):  
A. Mahmoud ◽  
B. Kouakou ◽  
E. Amoah ◽  
S. Gelaye
Keyword(s):  
Repeated Measures ◽  
Semen Quality ◽  
Sperm Concentration ◽  
Small Ruminants ◽  
Reproductive Activity ◽  
Least Square ◽  
Semen Parameters ◽  
Nonbreeding Season ◽  
Scrotal Circumference ◽  
Significant Difference

Seasonal variation of the reproductive activity of small ruminants in the southern USA is controlled by photoperiod. We tested the hypothesis that artificial manipulation of photoperiod has an effect on caprine testicular activity and semen quality. The objective of this study was thus to determine the effects of photoperiod on caprine scrotal circumference and semen parameters during the nonbreeding season. Ten Saanen and Alpine bucks, two to three years old, raised at the Small Ruminant Research and Extension Center of Fort Valley State University (latitude 32°37′ N, longitude 83°39′ W), were used in the study. Throughout the study, the bucks were fed a concentrate diet containing 16% crude protein, and 2.7 Mcal/Kg of digestible energy. Two groups of bucks randomly selected were exposed to long daylight (16L:8D; n=5) or ambient daylight (12L:12D, control;; n=5) for a period of three weeks during the month of March. Scrotal circumference measurements and semen collection were conducted on each buck twice a week for a total of five trials. Semen samples were collected using an artificial vagina and an electroejaculator. Samples were immediately transferred to the laboratory for further evaluation. Data were analyzed as a completely randomized design with repeated measures using SAS program (SAS, 1990). When means were significant by ANOVA (P&lt;0.05), they were separated by least significant difference. Results are presented as the least square means±SEM. Long daylight did not affect semen volume (mL), % motility, sperm concentration (billions/mL), % viability, or % abnormality(P&gt;0.05). However, semen motility, sperm concentration, and abnormality were influenced by treatment in trials 3, 1, and 5, respectively (P&lt;0.05). The least square means±SEM values for these parameters were 35±15, 0.58±0.1, and 20.0±3.7 for long daylight-treated bucks v. 87±15, 0.13±0.1, and 7.8±3.7 for the control, respectively. Further, long daylight affected scrotal circumference (P&lt;0.05). Scrotal circumferences were decreased in trials 1, 2, and 5 (P&lt;0.05). Long daylight decreased scrotal circumference without affecting semen quality in this study.

Evaluation of reproductive traits in Bos taurus and Bos indicus crossbred heifers: effects of postweaning energy manipulation.

1991 ◽  
Vol 69 (6) ◽  
pp. 2349 ◽  
Author(s):  
D J Patterson ◽  
L R Corah ◽  
J R Brethour ◽  
M F Spire ◽  
J J Higgins ◽  
...  
Keyword(s):  
Bos Taurus ◽  
Bos Indicus ◽  
Reproductive Traits

Fertility aspects in yearling beef bulls grazing endophyte-infected tall fescue pastures

2005 ◽  
Vol 17 (4) ◽  
pp. 479 ◽  
Author(s):  
G. M. Schuenemann ◽  
J. L. Edwards ◽  
F. M. Hopkins ◽  
N. R. Rohrbach ◽  
H. S. Adair ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Tall Fescue ◽  
Sperm Morphology ◽  
Semen Quality ◽  
Developmental Competence ◽  
Scrotal Circumference ◽  
Normal Sperm ◽  
Endocrine Profiles ◽  
Beef Bulls

During a 2-year study, yearling beef bulls were used to determine the effects of grazing on endophyte-infected tall fescue on endocrine profiles, semen quality and fertilisation potential. Bulls were allotted to graze tall fescue pastures infected with Neotyphodium coenophialum (E+; n = 20 per year) or Jesup/MaxQTM (Pennington Seed, Atlanta, GA, USA; NTE; n = 10 per year). Bulls were grouped by scrotal circumference (SC), bodyweight (BW), breed composites and age to graze tall fescue pastures from mid-November until the end of June (within each year). Blood samples, BW, SC and rectal temperatures (RT) were collected every 14 days. Semen was collected from bulls every 60 days by electroejaculation and evaluated for motility and morphology. The developmental competence of oocytes fertilised in vitro with semen from respective treatments was determined. Bulls grazing E+ pastures had decreased BW gain (P < 0.01), increased overall RT (P < 0.01) and decreased prolactin (P < 0.01) compared with animals grazing NTE pastures. Neither percentage of normal sperm morphology nor motility differed between bulls grazed on the two pasture types. Semen from E+ bulls demonstrated decreased cleavage rates (P = 0.02) compared with semen from NTE bulls. However, development of cleaved embryos to the eight-cell and blastocyst stages did not differ between the two groups. In conclusion, semen from bulls grazing E+ tall fescue resulted in decreased cleavage rates in vitro, which may lower reproductive performance owing to reduced fertilisation ability.

72 Invitro embryo production using prepubertal calf oocytes with conventional semen and sexed semen ULTRA-4M

2020 ◽  
Vol 32 (2) ◽  
pp. 162
Author(s):  
A. Velazquez ◽  
H. Alvarez ◽  
M. Kjelland ◽  
F. Villaseñor ◽  
G. Ariza ◽  
...  
Keyword(s):  
Bos Taurus ◽  
Bos Indicus ◽  
Sperm Concentration ◽  
Reproductive Potential ◽  
The United States ◽  
Field Trials ◽  
Cleavage Rate ◽  
Embryo Production ◽  
Sexed Semen ◽  
Α Level

Invitro embryo production (IVP) can increase the reproductive potential and genetic quality of cattle, as well as other species. This powerful assisted reproduction tool can be used to produce embryos from prepubertal calves, reducing the generation interval. A recent sexed semen technology known as ULTRA (ST Genetics), completely modified the technique, the media and sperm concentration. In field trials with AI there was no difference between conventional semen (CONV) and ultra-sexed semen at a concentration of 4 million per straw (ULTRA-4M). The combined use of IVP and ULTRA-4M can decrease the selection time for improving dairy and beef cattle herd genetics. The objective of this research was to compare the CONV and ULTRA-4M semen using bovine IVP and prepubertal calves. The research was carried out in the reproduction laboratory of the Facultad de Estudios Superiores Cuautitlán - Universidad Nacional Autónoma de México (FESC-UNAM). The IVP was performed with a continuous invitro culture (IVC) system. The ovaries were collected in Campeche, México, from Bos indicus×Bos taurus crossbred calves (6 months old) using surgical castration (for export to the United States) and transported to the laboratory (FESC-UNAM) in BO-HEPES-IVM (Bioscience™), in an oocyte transporter (WTA). Vitrogen media were used for IVF and IVC. For IVM, the cumulus-oocyte complexes (COCs) were selected (only grades 1 and 2) and matured for 24h at 38.5°C. Matured oocytes (n=600, divided equally into five replicates) were divided into 2 groups, the CONV group and the ULTRA-4M group. The IVF process was conducted with CONV and ULTRA-4M semen from the same bull (Holstein) at a concentration of 2×106 and 0.5×106 spermatozoamL−1, respectively, for 18h in 38.5°C, 5% CO2, 95% air, and 100% humidity. The presumptive zygotes were denuded by pipetting and set in IVC until Day 7 at 38.5°C, 5% CO2, 5% O2, and 90% N2 at 100% humidity. The cleavage results were recorded 56h after the beginning of IVC. The cleavage rate, embryos with more than 6 cells, and blastocysts on Day 7 of culture were evaluated. The statistical analysis was carried out with the GLM procedure of the SAS software (version 9.3; SAS Institute Inc.) to evaluate the results of CONV vs. ULTRA-4M (α level=0.05). The percentage of cleavage for CONV was 46%±1.4 and 43.2%±1.4 for ULTRA-4M. The results for embryos with more than 6 cells in the CONV and ULTRA-4M groups were 16%±0.6 and 14%±0.6, respectively. The percentage of blastocysts on Day 7 for CONV was 9%±0.6 and 8%±0.6 for ULTRA-4M. There were no significant differences between groups (P&gt;0.05) for all variables analysed. In conclusion, under the conditions of this research the ULTRA-4M and CONV produced similar results for IVP.

EFFECTS OF PARSLEY SEEDS AT DIFFERENT LEVELS AS NATURAL ADDITIVES ON SEMEN QUALITY IN RABBIT MALES

2018 ◽  
Vol 1 (1) ◽  
pp. 81-92
Author(s):  
Jamal A. Embark
Keyword(s):  
Seminal Plasma ◽  
Semen Quality ◽  
Control Diet ◽  
Plasma Concentrations ◽  
Sperm Concentration ◽  
Reproductive Traits ◽  
Quality Parameters ◽  
Control Group ◽  
Semen Collection ◽  
Different Levels

This study is designed to evaluate the effect of using parsley seeds (PAS) at different levels as a natural on semen quality and reduce the effect of lipidperoxidation of bucks. Forty New Zealand rabbit bucks 8 month old were divided into four groups (each 10 rabbit bucks). The groups were divided as follows: Control diet (free from PAS), T1: Control diet + 5g/kg PAS, T2: Control diet + 10g/kg PAS; T3: Control diet + 15g/kg PAS. Semen sample were collected twice a week; from each rabbit buck by artificial vagina. The first semen collection was used to evaluate semen quality parameters. However, the second semen collection was used for analysis semen plasma. Results revealed that feeding diets containing different levels of PAS significantly (P<0.05) increased semen volume, mass activity, individual motility, PSV, sperm concentration, total sperm and seminal plasma activity of ALP enzyme and significant (P<0.05) decrease in dead sperm and seminal plasma concentrations of total lipids, triglycerides, cholesterol and MDA and seminal plasma activities of AST and ALT enzymes and TAC as compared with the control group. In conclusion, dietary supplementation with different levels of PAS, especially at the level of 15 g/kg (T3) resulted in significant improvement in semen quality, antioxidant status and reproductive traits of rabbit bucks.

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