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Morphometric Features, Production and Reproduction Potentials of Indigenous Sheep Genetic Resources of Bangladesh

Saiful Islam
Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh and Department of Livestock Services, Farmgate, Dhaka-1207, Bangladesh

A. K. Fazlul Haque Bhuiyan
Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Ersaduzzaman
Goat and Sheep Production Division, BLRI, Saver, Dhaka-1341,Bangladesh

Munir Hossain
Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Seung Hwan Lee
Division of Animal and Dairy Science, Chungnam National University Daejeon 34134, South Korea

Mohammad Shamsul Alam Bhuiyan PhD
Professor
Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

This study was conducted to investigate the phenotypic, production and reproduction potentials of indigenous sheep of Bangladesh. Data were collected from six different geographic locations that covered twelve Upazila from eight districts. Information were collected from 503 individuals using a structured questionnaire through personal interaction, on-spot recording and phenotypic measurements from different age groups during the period of October 2015 to February 2017. The predominant coat color was found as creamy or whitish in the studied flocks that ranged from 34% to 89% of the total population with mean a of 62%. The average mature live weight of rams and ewes were 17.90±0.91 and 15.07±0.11 kg, respectively. The morphometric features like wither height, chest girth, body length, head length, ear length, tail length, scrotal length and scrotal circumference were 58.47±0.75, 68.59±0.74, 58.88±0.83, 16.15±0.24, 11.23±0.32, 10.83±0.23, 10.23±0.20 and 16.33±0.18 cm in rams and that of 49.02±0.28, 59.77±0.27, 49.08±0.30, 15.04±0.12, 8.63±0.17 and 10.55±0.15 cm in ewes, respectively. The mean birth weight, weaning weight and six months weight were 1.04±0.01, 5.40±0.08, 8.36±0.11 kg, respectively. The average age at first lambing, lambing interval, post-partum heat period, litter size, service per conception and age at culling were 12.81±0.06 month, 179.68±1.06 and 41.37±0.58 days, 1.99±0.02 and 1.18±0.01 and 3.84±0.08 years respectively. All these production and reproduction traits varied significantly among the studied locations except S/C. In conclusion, this study provided some baseline information on indigenous sheep genetic resources of Bangladesh that could be utilized in planning future conservation and genetic improvement scheme. Abstract

Keywords: Indigenous sheep, Production, Reproduction, Bangladesh

Location: In Bangladesh

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Sheep, Genetic resources

Objectives:

To investigate on morphology, morphometric characteristics, the productive and reproductive potential of indigenous sheep of Bangladesh.

Methodology:

Investigations were carried out in six different geographic locations of Bangladesh namely Haor region-1, Jamuna river basin-2, Coastal rgion-3, Barind tract-4, Northeastern barind tract-5 and Mangrove forest region-6, which included thirteen upazilas from eight districts. Details on geographic locations (latitudes and longitudes), including respective upazilas and distracts are presented. These six regions were selected due to have better concentration of indigenous sheep as well as to have representation of total geographic scenarios of the country. A semi structured questionnaire was prepared for this purpose. Data were collected fromthe farmers’ flock either inconsultation withfarmowners, visual estimationand on-spot recording. Data were recorded on three to four unrelated individuals from each flock on traits related to morphometry and growth production and reproduction. The morphometric characteristics of both sexes were measured using the weighing balance and measuring tape from adult animals only, with age varied between 1.5 to 3 years. The studied traits were body length (BL), chest girth (CG), wither height (WH), head length (HL), ear length (EL), tail length(TL), scrotal length (SL) and scrotal circumference (SC). The following productive and reproductive traits were included such as lamb birth weight (BWT), weaning weight (WWT), six months weight (SMWT), mature live weight (MLWT), age at first lambing (AFL), lambing interval (LI), postpartum heat period (PPHP), liter size (LS), service per conception (S/C) and age at culling (AC). The age of theanimalswas recordedbasedondentitionpatternaswellas farmer’s information. Inaddition, reproductive parameters were determined mostly on the basis offarmers recalled and on spot observation ofthe animals. The collected data were checked, compiled and screened for outlier observation those didn’t within the range of Mean ±3SD. Then screened data were processed for statistical analysis using SAS (version 9.3.1). The mean±SE has been calculated for morphometric, productive and reproductive performance of rams and ewes in relation to location and management. In case of significant independent variable, the differences among the treatment means were examined by using Duncan Multiple Range Test (DMRT) using the same software. The data on studied traits were analyzed using the following statistical model Y_ijk =µ +L_i+S_j+M_k +e_ijk. Where, Y_ijk is the observed value of a trait, µ is the population mean, L_i is the effect of location (i = 1 to 6), S_j is the effect of sex (j= 1 and 2, male = 1, 2 = female), M_k is the effect of management (k = 1 and 2; 1 = semiintensive and 2 = intensive) and e_ijk = random error associated with Y_ijk observation with mean zero and common variance (σ² ).

Source of Information: Journal of Animal Breeding and Genomics (JABG), 2018 June, 2(2): 001-008

Article Link (Online Journal): https://doi.org/10.12972/jabng.20180026

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The present study indicates that indigenous sheep of Bangladesh have notable differences in terms of morphology, production and reproduction capabilities among the geographic locations. The sheep of mangrove region had better prolificacy. However, better growth rate was found in coastal sheep having mostly single birth. In conclusion, this study provided some basic information and important insights on potentialities of Indigenous sheep genetic resources of Bangladesh that could be utilized in planning future national sheep conservation and breeding scheme.

Knowledge Management: Journal