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

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.

Effects of environmental factors, age and genotype on sperm production and semen quality in Bos indicus and Bos taurus AI bulls in Brazil

2002 ◽  
Vol 70 (3-4) ◽  
pp. 181-190 ◽  
Author(s):  
L.F.C. Brito ◽  
A.E.D.F. Silva ◽  
L.H. Rodrigues ◽  
F.V. Vieira ◽  
L.A.G. Deragon ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Bos Taurus ◽  
Semen Quality ◽  
Bos Indicus ◽  
Sperm Production

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.

Seasonal variation in semen quality in Bos indicus and Bos taurus bulls raised under tropical conditions

2006 ◽  
Vol 66 (4) ◽  
pp. 822-828 ◽  
Author(s):  
M. Nichi ◽  
P.E.J. Bols ◽  
R.M. Züge ◽  
V.H. Barnabe ◽  
I.G.F. Goovaerts ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Bos Taurus ◽  
Semen Quality ◽  
Bos Indicus ◽  
Tropical Conditions

Effects of scrotal insulation on sperm production, semen quality, and testicular echotexture in Bos indicus and Bos indicus × Bos taurus bulls

2003 ◽  
Vol 79 (1-2) ◽  
pp. 1-15 ◽  
Author(s):  
Leonardo F.C. Brito ◽  
Antonio E.D.F. Silva ◽  
Rogerio T. Barbosa ◽  
Maria M. Unanian ◽  
John P. Kastelic
Keyword(s):  
Bos Taurus ◽  
Semen Quality ◽  
Bos Indicus ◽  
Sperm Production ◽  
Scrotal Insulation

Quality of ram spermatozoa separated with modified swim up method

2018 ◽  
Vol 33 (2) ◽  
pp. 62-70 ◽  
Author(s):  
A Hossain ◽  
MM Islam ◽  
F Naznin ◽  
RN Ferdousi ◽  
FY Bari ◽  
...  
Keyword(s):  
Semen Quality ◽  
Membrane Integrity ◽  
Quality Parameters ◽  
Fluid Medium ◽  
Normal Morphology ◽  
The Mean ◽  
Mass Activity ◽  
Fresh Semen ◽  
Artificial Vagina

Semen was collected from four rams, using artificial vagina and viability%, motility% and plasma membrane integrity% were measured. Fresh ejaculates (n = 32) were separated by modified swim-up separation using modified human tubal fluid medium. Four fractions of supernatant were collected at 15-minute intervals. The mean volume, mass activity, concentration, motility%, viability%, normal morphology and membrane integrity% (HOST +ve) of fresh semen were 1.0 ± 0.14, 4.1 ± 0.1 × 109 spermatozoa/ml, 85.0 ± 1.3, 89.4 ± 1.0, 85.5 ± 0.7, 84.7 ± 0.5 respectively. There was no significant (P>0.05) difference in fresh semen quality parameters between rams. The motility%, viability% and HOST +ve % of first, second, third and fourth fractions were 53.4 ± 0.5, 68.2 ± 0.3, 74.8 ± 0.3 and 65.5 ± 0.4; 55.5 ± 0.4, 66.2 ± 0.4, 74.5 ± 0.3 and 73.6 ± 0.3 and 66.7 ± 0.5, 66.8 ± 0.5, 65.2 ± 0.4 and 74.7 ± 0.5 respectively. The motility%, viability% and membrane integrity% of separated semen samples differed significantly (P<0.05) between four fractions. The mean motility% and viability% were significantly higher (P<0.05) in third fraction (74.8 ± 0.3%), whereas the mean HOST +ve% was significantly higher (P<0.05) in fourth fraction (74.7 ± 0.5). All quality parameters of separated spermatozoa were significantly (P<0.05) lower than that of fresh semen. The pregnancy rates were higher with fresh semen (71%) in comparison to that of separated sample (57%).Bangl. vet. 2016. Vol. 33, No. 2, 62-70

scholarly journals Genome-wide identification of cyclin-dependent kinase (CDK) genes affecting adipocyte differentiation in cattle

BMC Genomics ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Cuili Pan ◽  
Zhaoxiong Lei ◽  
Shuzhe Wang ◽  
Xingping Wang ◽  
Dawei Wei ◽  
...  
Keyword(s):  
Gene Family ◽  
Expression Analysis ◽  
Adipocyte Differentiation ◽  
Bos Taurus ◽  
Adipogenic Differentiation ◽  
Critical Role ◽  
Bos Indicus ◽  
Specific Expression ◽  
Genome Wide ◽  
A Genome

Abstract Background Cyclin-dependent kinases (CDKs) are protein kinases regulating important cellular processes such as cell cycle and transcription. Many CDK genes also play a critical role during adipogenic differentiation, but the role of CDK gene family in regulating bovine adipocyte differentiation has not been studied. Therefore, the present study aims to characterize the CDK gene family in bovine and study their expression pattern during adipocyte differentiation. Results We performed a genome-wide analysis and identified a number of CDK genes in several bovine species. The CDK genes were classified into 8 subfamilies through phylogenetic analysis. We found that 25 bovine CDK genes were distributed in 16 different chromosomes. Collinearity analysis revealed that the CDK gene family in Bos taurus is homologous with Bos indicus, Hybrid-Bos taurus, Hybrid Bos indicus, Bos grunniens and Bubalus bubalis. Several CDK genes had higher expression levels in preadipocytes than in differentiated adipocytes, as shown by RNA-seq analysis and qPCR, suggesting a role in the growth of emerging lipid droplets. Conclusion In this research, 185 CDK genes were identified and grouped into eight distinct clades in Bovidae, showing extensively homology. Global expression analysis of different bovine tissues and specific expression analysis during adipocytes differentiation revealed CDK4, CDK7, CDK8, CDK9 and CDK14 may be involved in bovine adipocyte differentiation. The results provide a basis for further study to determine the roles of CDK gene family in regulating adipocyte differentiation, which is beneficial for beef quality improvement.

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