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Genetic Variation and Relations in Different Goat Populations of Bangladesh

M. F. Afroz
Biotechnology Division, Bangladesh Livestock Research Institute, Savar, Bangladesh.

M. O. Faruque
Department of Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

S. S. Husain
Department of Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

J. L. Han
CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing-100193, China

B. Paul
Animal Production Officer, Animal Production and Health Division, FAO, Italy

Abstract/ Executive Summary:

The genetic relation among different populations and breeds of goats in Bangladesh was studied using 15 microsatellite markers. A total of 181 goat samples- 36 from Black bengal of western part (BBW), 39 from Black Bengal of central part (BBC), 40 from Black Bengal of Hilly region (BBH), 28 from exotic breeds (JAM) and 39 from crossbred (CRW) were genotyped. The allele number per locus ranged from 2 to 12. The average number of alleles per population was 5.69 ± 2.32, 5.38 ± 2.02, 5.23 ± 2.28, 6.08 ± 2.33, and 5.77 ± 2.35 for BBW, BBC, BBH, CRW and JAM, respectively. Heterozygosity was found in the range from 0.5049 ± 0.0222 (BBC) to 0.5751 ± 0.0262 (JAM). The genetic distance (DA) between BBC and JAM was the highest (0.0627) and that between JAM and CRW was the lowest (0.0037). In the phylogenetic dendrogram, BBC and BBH grouped in the same cluster, while CRW and JAM formed another cluster. BBW formed a third cluster between those two clusters. The closest genetic relation between BBW and CRW indicates the introgression of exotic genes occurred more in BBW than BBC and BBH.

Keywords: Goats, Microsatellite markers, Genetic variation, Dendrogram

Location: BAU, Mymensingh

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Goat

Objectives:

To find out the genetic variation and relation among different populations of goats in Bangladesh using microsatellite markers.

Methodology:

Sample collection, DNA extraction and quantification: All the goats of Bangladesh were divided into five populations based on geographical distribution and history of breeding and management systems. These were (i) BBW- Black Bengal goats in the western part of the country, (ii) BBC- Black Bengal goats in the central part of the country, (iii) BBH- Black Bengal goats in the hilly area of the country, (iv) JAM- imported Indian goats consist of Jamnapari, Sirohi and Beetal, and (v) CRW- crossbred between JAM and Black Bengal goat. Forty samples were collected from each population. However 30 samples were collected from JAM. So a total of 190 samples were collected for five populations . Samples were collected only from adult goats of subsistent farmers taking a ratio of 1:3 for male and female. Samples were collected avoiding related animals. Blood was collected in venoject tube, treated with anticoagulant and carried to Animal Genetics Laboratory of Bangladesh Agricultural University and preserved at 40C until DNA extraction. DNA was extracted following a salting out protocol after IAEA (2004). The DNA samples were quantified in 0.8% agarose gel electrophoresis.

Source of Information: Bang. J. Anim. Sci. 2010, 39(1&2) : 1 – 8 ISSN 0003-3588

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The average number of alleles per population was 5.69 ± 2.32, 5.38 ± 2.02, 5.23 ± 2.28, 6.08 ± 2.33, and 5.77 ± 2.35 for BBW, BBC, BBH, CRW and JAM, respectively. Heterozygosity was found in the range from 0.5049 ± 0.0222 (BBC) to 0.5751 ± 0.0262 (JAM). The genetic distance (DA) between BBC and JAM was the highest (0.0627) and that between JAM and CRW was the lowest (0.0037). In the phylogenetic dendrogram, BBC and BBH grouped in the same cluster, while CRW and JAM formed another cluster. BBW formed a third cluster between those two clusters. The closest genetic relation between BBW and CRW indicates the introgression of exotic genes occurred more in BBW than BBC and BBH.

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