Comparative superovulatory responses in crossbred dairy cattle (Bos indicus × Bos taurus) with FSH-P and Super-OV

1990 ◽  
Vol 33 (1) ◽  
pp. 328
Author(s):  
S.K. Singla ◽  
M.L. Madan
Keyword(s):  
Dairy Cattle ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Crossbred Dairy Cattle

scholarly journals Differential expression of microRNAs associated with thermal stress in Frieswal (Bos taurus x Bos indicus) crossbred dairy cattle

2017 ◽  
Vol 23 (1) ◽  
pp. 155-170 ◽  
Author(s):  
Gyanendra Singh Sengar ◽  
Rajib Deb ◽  
Umesh Singh ◽  
T. V. Raja ◽  
Rajiv Kant ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Dairy Cattle ◽  
Differential Expression ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Crossbred Dairy Cattle

Bos indicus and Bos taurus crossbred dairy cattle in Australia. IV.* Progeny testing and expected rate of genetic improvement

1976 ◽  
Vol 27 (2) ◽  
pp. 309 ◽  
Author(s):  
IR Franklin ◽  
RH Hayman ◽  
RO Hewetson
Keyword(s):  
Dairy Cattle ◽  
Heat Tolerance ◽  
Genetic Improvement ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Progeny Testing ◽  
Dairy Farmers ◽  
Improvement Program ◽  
Tropical Environments ◽  
Tick Resistance

A dairy improvement program designed to develop a breed of cattle adapted to tropical environments is described. Each year young crossbred (Bos indicus x Bos taurus) bulls are screened for heat tolerance and tick resistance, and then progeny-tested in the herds of cooperating dairy farmers. Estimates of phenotypic and genetic means, variances and correlations are presented for production of milk and milk components, and the rate of genetic improvement is discussed. In particular the heritability of milk yield in the crossbred progeny is 0.27, and the theoretical rate of improvement is 2.6% per year. ____________________ *Part III, Aust. J. Agric. Res., 25: 1023 (1974).

Bos indicus and Bos taurus crossbred dairy cattle in Australia. II. Effect of calf removal and prolactin treatment

1973 ◽  
Vol 24 (3) ◽  
pp. 449 ◽  
Author(s):  
RH Hayman
Keyword(s):  
Dairy Cattle ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Dairy Herd ◽  
Prolactin Secretion ◽  
The Other ◽  
Field Station ◽  
Filial Generation ◽  
Maternal Instinct ◽  
Calf Removal

Some 70 % of filial generation Red Sindhi x Jersey and Sahiwal x Jersey crossbred animals were discarded from the dairy herd on the F. D. McMaster Field Station, CSIRO, because of failure to continue in lactation when separated from their calves. This well-known characteristic of Bos indicus cattle, generally referred to as 'maternal instinct,' has been assumed to emanate from the dam's sense of loss on separation from her offspring. Observations on animals in the Field Station herd suggested that this separation causes the dam to cease producing secretory hormones with consequent cessation of lactation. Two systems of management, in one of which the calf was separated from its dam within 24 hr of birth while in the other the dam and offspring were allowed to run together for 10 days, both failed to overcome the problem. Injections of oxytocin after separation were also unsuccessful. Some success was obtained by daily injections of 250 i.u. of prolactin for the 10 days immediately following the separation of dam and offspring, and it was concluded that the presence of the calf stimulated prolactin secretion by the pituitary. Continuation of injections over a period of 7-10 days enabled some animals to continue their lactation without the stimulation afforded by the calf.

Bos indicus and Bos taurus crossbred dairy cattle in Australia. I. Crossbreeding with selection among filial generations

1972 ◽  
Vol 23 (4) ◽  
pp. 519 ◽  
Author(s):  
RH Hayman
Keyword(s):  
Dairy Cattle ◽  
Milk Production ◽  
Milk Yield ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Filial Generation ◽  
Total Milk ◽  
Maternal Instinct ◽  
The Mean ◽  
Dairy Animal

An attempt to breed a dairy animal having satisfactory milk production in a difficult environment is reported. Red Sindhi and Sahiwal (Bos indicus) males crossed with Jersey (Bos taurus) females were used as foundation breeds, and each cross was bred on to the F3 generation. All females in each generation were milked for at least one lactation. Males used as sires in each generation were chosen from progeny of the best available females. The report covers the 16 year period 1955–1970 and is based on the first lactation records of parental females and their F1, F2, and F3 progenies. Owing to the phenomenon known as "maternal instinct", the mean first lactation milk yield of each filial generation was inferior to that of the parental generation of Jerseys. The Jersey mean was 1944 kg milk in 206 days, that of F1, F2, and F3 Sahiwal x Jersey crosses 815 kg in 112 days, and that of F1, F2, and F3 Sindhi x Jersey crosses 375 kg in 83 days. Maximum first lactation yield recorded for a Jersey was 4536 kg in 305 days, for a Sahiwal x Jersey cross 4649 kg in 305 days, and for a Sindhi x Jersey cross 2694 kg in 305 days. The range in recorded milk yields among F2 and F3 Sahiwal x Jersey females indicated that selection against maternal instinct and for total milk yield would be effective.

scholarly journals Genotyping of the polymorphism within exon 3 of prolactin gene in various dairy breeds by PCR RFLP (Brief report)

2008 ◽  
Vol 51 (3) ◽  
pp. 298-299 ◽  
Author(s):  
A. Ratna Kumari ◽  
K. M. Singh ◽  
K. J. Soni ◽  
R. K. Patel ◽  
J. B. Chauhan ◽  
...  
Keyword(s):  
Mammary Gland ◽  
Dairy Cattle ◽  
Genetic Characterization ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Genotype Frequencies ◽  
Prolactin Gene ◽  
Pcr Rflp ◽  
Transition Mutation

Abstract. In mammals, especially dairy cattle the prolactin has important functions like the development of mammary gland affecting milk yield and composition. It has been mapped to chromosome 23 in Bovine (HALLERMAN et al., 1988). A silent A→G transition mutation at the codon for amino acid 103 in exon 3 of bovine prolactin (bPRL) gene gives rise to a polymorphic Rsa I site, has become a popular genetic marker used for genetic characterization of cattle populations by means of PCR-RFLP (MITRA et al., 1995; CHRENEK et al., 1998; DYBUS, 2005). The present study reports on the genotype frequencies observed in various Bos taurus and Bos indicus dairy cattle breeds.

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.

Expression of candidate genes for residual feed intake in tropically adapted Bos taurus and Bos indicus bulls under thermoneutral and heat stress environmental conditions

2021 ◽  
pp. 102998
Author(s):  
Bianca Vilela Pires ◽  
Nedenia Bonvino Stafuzza ◽  
Luara Afonso de Freitas ◽  
Maria Eugênia Zerlotti Mercadante ◽  
Ester Silveira Ramos ◽  
...  
Keyword(s):  
Heat Stress ◽  
Candidate Genes ◽  
Feed Intake ◽  
Environmental Conditions ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Residual Feed Intake
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