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Comparative Study on Conception Rate in Indigenous and Crossbred Cows After Artificial Insemination

Sharifuzzaman
Faculty of Animal Science and Veterinary Medicine, Patuakhali Science and Technology University, Babugonj, Barisal-8210, Bangladesh.

MA Jalil
Veterinary surgeon, District Veterinary Hospital, Dinajpur-5200, Bangladesh

SC Barman
Coordinator-livestock, Practical Action, Bangladesh, Rangpur Office

M.A. Matin
Department of Dairy and Poultry Science, Patuakhali Science and Technology University, Babugonj, Barisal-8210, Bangladesh

Md Rokonuzzaman
Research officer
Dr. Wazed Research Institute, Begum Rokeya University, Rangpur, Bangladesh

Md. Ashadul Haque
District Livestock Officer, Kushtia, Bangladesh

Abstract/ Executive Summary:

The objective was to make a comparative study in conception rate (CR)) of cows after artificial cows. The study was carried out in the Kushtia district, Bangladesh. Three hundred and fifty cows were examined during the study period of one year (2011-2012) brought to different artificial insemination (AI) points. The experimental animals were within zero to 7^th parity and they have inseminated artificially by using the semen from different bulls of 3 genotypes. The study revealed that the overall conception rate is 62.86%. In different breed groups, the conception rate was highest (69.23%) in native cattle and intermediate (67.92%) in Sahiwal cross, and lowest (57.22%) in Friesian cross. In different age groups conception rate was highest in between 4-5 years, 72.31-70.51%, and lower in the animals with 9 years or above. Cows with the aged group of more than 9 years had a significantly decreased conception rate. In different parity, the conception rate was higher in both parity 3 and 4 with the conception rate being 79.63 and 75.00% respectively, and declining from 6^th parity gradually. The service per conception was lowest (1.44) in local cow, intermediate (1.47) in Sahiwal cross, and highest (1.75) in Friesian cross. The lower service per conception is desirable merit in the breeding of animals. More service was required for heifers than older animals. Altogether the data demonstrated that breed of cows at different ages and parity have a considerable effect on the conception rate. To achieve the desired rate of conception, the farmer should inseminate their cows considering the age and parity of the cows.

Keywords: Conception rate, Artificial insemination, Indigenous, Crossbred, Cow, Bangladesh.

Location: Kushtia district, Bangladesh.

Start Date: 00-01-2011

End Date: 00-12-2012

Program Area: Variety and Species

Commodity: Cow

Objectives:

To make a comparative study on the conception rate of cows in Kushtia district in order to recommend the optimum approach for maximum conception rate.

Methodology:

The experiment was conducted at different artificial insemination centers (AI), Kushtia, Bangladesh for a period of January 2011 to December 2012 with 350 cows of 3 different The experiment was conducted at different artificial insemination centers (AI), Kushtia, Bangladesh for a period of January 2011 to December 2012 with 350 cows of 3 different genotypes. The animals were of 3 to 12 years aged and within zero to 7^th parity. The age and parity were recorded according to their own statement and also used by dental formulae. Most of the animals were indigenous Zebu type and besides these, the crossbreds, Friesian cross, and Sahiwal cross were available under the experiment. The overall feeding and management of the animals were almost similar and these are kept by the farmers with stall feeding and grazing. When the farmers brought their animals to the AI centers, the reproductive status and estrus condition of the animals was checked and determined by observing the clinical signs and if it is necessary, by using a vaginal speculum for examining the condition of the cervix. Artificial insemination was done after a variable period of signs of estrus, ranging from 12 h to 18 h, by a trained AI technician with thawed semen straw. Three types of semen were used for AI in the present study, which was collected from bulls of three genotypes (Local X Sahiwal; Local X Friesian; Sahiwal X Friesian). Cows that were brought from rural areas inseminated with the semen of Local X Sahiwal and which were brought from the semi-urban and urban areas were inseminated with the semen of Friesian Cross. Conception rates (CR) were estimated from the proportion of pregnancies confirmed by the rectal palpation of the genital tract at day 60 of post insemination among the total number of cows /heifer inseminated artificially with frozen semen in a specified period of time. The results of the pregnancy diagnosis were recorded to find out the conception rate. The pregnancy was confirmed by observing the asymmetry of the horn, palpation of the fetus, and slipping of the fetal membrane. Conception rate % = Number of cows pregnant/Number of cows inseminated × 100; Service per conception = Total number of services/Total number of cows conceived

Source of Information: International Journal of Natural and Social Sciences 2 (2015) 9-12

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The service per conception was higher (1.75) in Friesian cross followed by Sahiwal cross (1.47) and lowest in the local breed with an overall number of services per conception of cows in Kushtia district was 1.59. Parity 3 and 4 needed the lowest (1.26-1.33) service per conception but null parity or cows with parity more than 6 needed more than 2 services per conception. More service was required for heifers than older animals. It is demonstrated that the breed of cows at different ages and parity has a considerable effect on the conception rate. To achieve the desired rate of conception, the farmer should inseminate their cows considering the age and parity of the cows.

Knowledge Management: Journal