Genetic relationship among indigenous sheep population of Bangladesh

Deb, GK; Choudhury, ME; Kabir, M; Khan, Muhammad Younis; Ershaduzzaman, Md.; Nahar, T. N.; Hossain, Sumon M.; Alam, Md. Samsul; Alim, Md. Abdul

doi:10.3329/bjas.v48i1.44553

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…South African breeds of the Nguni, Blackhead Persian, Namaqua Afrikaner and Swakara are small breeds restricted to specific production systems and geographic locations [ 28 , 29 ], which explains the high frequency of ROH in these populations. Similarly-raised worldwide populations include the Ethiopian Menzi [ 30 , 31 ], Bangladesh Galore [ 32 ], Black-headed Mutton [ 33 ] that also had high numbers of ROH in this study. ROH due to recent inbreeding tends to be longer, due to little opportunity for recombination to break up the segments that are identical-by-descent [ 34 ].…”

Section: Discussionmentioning

confidence: 99%

Runs of homozygosity analysis of South African sheep breeds from various production systems investigated using OvineSNP50k data

et al. 2021

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Background Population history, production system and within-breed selection pressure impacts the genome architecture resulting in reduced genetic diversity and increased frequency of runs of homozygosity islands. This study tested the hypothesis that production systems geared towards specific traits of importance or natural or artificial selection pressures influenced the occurrence and distribution of runs of homozygosity (ROH) in the South African sheep population. The Illumina OvineSNP50 BeadChip was used to genotype 400 sheep belonging to 13 breeds from South Africa representing mutton, pelt and mutton and wool dual-purpose breeds, including indigenous non-descript breeds that are reared by smallholder farmers. To get more insight into the autozygosity and distribution of ROH islands of South African breeds relative to global populations, 623 genotypes of sheep from worldwide populations were included in the analysis. Runs of homozygosity were computed at cut-offs of 1–6 Mb, 6–12 Mb, 12–24 Mb, 24–48 Mb and > 48 Mb, using the R package detectRUNS. The Golden Helix SVS program was used to investigate the ROH islands. Results A total of 121,399 ROH with mean number of ROH per animal per breed ranging from 800 (African White Dorper) to 15,097 (Australian Poll Dorset) were obtained. Analysis of the distribution of ROH according to their size showed that, for all breeds, the majority of the detected ROH were in the short (1–6 Mb) category (88.2%). Most animals had no ROH > 48 Mb. Of the South African breeds, the Nguni and the Blackhead Persian displayed high ROH based inbreeding (FROH) of 0.31 ± 0.05 and 0.31 ± 0.04, respectively. Highest incidence of common runs per SNP across breeds was observed on chromosome 10 with over 250 incidences of common ROHs. Mean proportion of SNPs per breed per ROH island ranged from 0.02 ± 0.15 (island ROH224 on chromosome 23) to 0.13 ± 0.29 (island ROH175 on chromosome 15). Seventeen (17) of the islands had SNPs observed in single populations (unique ROH islands). The MacArthur Merino (MCM) population had five unique ROH islands followed by Blackhead Persian and Nguni with three each whilst the South African Mutton Merino, SA Merino, White Vital Swakara, Karakul, Dorset Horn and Chinese Merino each had one unique ROH island. Genes within ROH islands were associated with predominantly metabolic and immune response traits and predomestic selection for traits such as presence or absence of horns. Conclusions Overall, the frequency and patterns of distribution of ROH observed in this study corresponds to the breed history and implied selection pressures exposed to the sheep populations under study.

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Section: Discussionmentioning

confidence: 99%

Runs of homozygosity analysis of South African sheep breeds from various production systems investigated using OvineSNP50k data

et al. 2021

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“…There is a high genetic dissimilarity within populations and a low genetic dissimilarity among sheep populations disseminated regionally [ 17 ]. Based on microsatellite marker evaluation, Barind and Jamuna river basin sheep belong to a related genetic group, while coastal sheep belong to other genetic groups [ 14 ]. However, based on mitochondrial DNA sequence, all Bangladeshi sheep populations are in the same group, and there is an evolutionary relationship with Indian, Chinese, and Turkish sheep breeds [ 17 ].…”

Section: Sheep Biodiversity In Bangladeshmentioning

confidence: 99%

“…Nowadays, many exotic and crossbred sheep are entering Bangladesh from neighboring countries through illegal transportation, resulting in the availability of exotic sheep breeds and their crossbreds in the border areas. Muzaffarabad and Nagpuri sheep breeds, as well as crossbreds, have been discovered in Meherpur, Chuadanga, Chapainawabganj, and other border districts [ 10 , 14 – 20 ], disrupting the planned breeding system and causing genetic erosion of our valuable native sheep germplasm.…”

Section: Sheep Biodiversity In Bangladeshmentioning

confidence: 99%

Environmental adaptability, morphometric features with reproductive and productive potentialities of indigenous sheep in Bangladesh

Rakib¹,

Desha²,

Rahman³

et al. 2022

J Adv Vet Anim Res

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Indigenous sheep are highly adaptable and widely distributed in different regions of Bangladesh. They are famous for their tolerance to harsh environmental conditions, low demand for feed, and disease resistance with minimum or no housing and management facilities. Ample indiscrimi¬nate research reports and case studies on the native sheep of Bangladesh have been published. Nonetheless, a comprehensive review of reproductive and productive performances, as well as their various morphometric physiognomies and climate resilience capabilities, is lacking. This review was designed to explore and summarize the available research reports on indigenous sheep to highlight the gaps and provide an updated database for the future research plan for sustainable native sheep production in Bangladesh. It covers studies on sheep biodiversity, their adaptabil¬ity to the local environment, morphometric features, feeding and nutrition, reproduction and production performances, diseases and health management, and the problems and prospects of sheep farming in Bangladesh. Due to the increased demand for animal protein, especially red meat, the scope of sheep farming increases along with that of other large and small ruminants. The vital constraints of sheep production in Bangladesh include insufficient feed and fodder sup¬ply with its high prices, higher disease occurrence with low or no management practices, kid mortality, and a poor marketing channel with the lower popularity of sheep meat than goat meat. Future research would be a prerequisite to measuring the impact of native sheep on household economies and food security during the year, evaluating the other challenges, and finding out the possible interventions in the fields of nutrition, reproduction, and health management.

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“…Garole (GAR) is a world-famous dwarf type sheep breed available in and around the Sundarban delta region (SDR). Sheep genetic resources of Bangladesh are comprised of mostly non-descript indigenous types along with a small proportion of exotic pure breed and crossbreds [3,4]. Indigenous sheep have greater adaptability under hot and humid climatic conditions with better disease resistance capability.…”

Section: Introductionmentioning

confidence: 99%

Knowledge and attitude towards genetically modified foods: A quantitative cross-sectional study among the educated subjects in the four largest divisions of Bangladesh

Das¹,

Sumit²

2023

J Adv Biotechnol Exp Ther

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The food consumers and stakeholders of Bangladesh have limited knowledge and perception over genetically modified (GM) foods. As no studies have been done regarding this among the Bangladeshi educated people on a large scale, hence this study aims to determine the level of knowledge and attitude regarding GM foods; and to explore the related factors as well. A cross-sectional survey was done with a close-ended questionnaire in the four largest divisions of Bangladesh where respondents were above 18 years of age and completed at least higher secondary level education. It was observed that among the total 614 respondents, 24.8% had no acquaintance with GM food. Of the remaining 462 respondents, 41.8% had better knowledge and 30.7% had positive attitude. The level of knowledge significantly varied with respondents’ gender, occupation, monthly income, educational status, and discipline studied where male, pharmaceutical workers, respondents with monthly income of 50001-100000 BDT, science studied respondents had significantly better knowledge than their counterparts. Similarly, respondents’ attitude on GMOs significantly differed with gender, occupation, monthly income and education in which positive attitude were shown by respondents with better knowledge. Finally, logistic regression analysis showed that female and business studied respondents had significantly less likely to have better knowledge and positive attitude than reference group, while respondents with monthly income between 50001-100000 BDT had more likely to have better knowledge and positive attitude, and NGO workers had more likely to have positive attitude than references. Thus, this study will help the policymakers of Bangladesh to perceive the current scenario of public demands on GM foods.

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Genetic relationship among indigenous sheep population of Bangladesh

Cited by 5 publications

References 6 publications

Runs of homozygosity analysis of South African sheep breeds from various production systems investigated using OvineSNP50k data

Runs of homozygosity analysis of South African sheep breeds from various production systems investigated using OvineSNP50k data

Environmental adaptability, morphometric features with reproductive and productive potentialities of indigenous sheep in Bangladesh

Knowledge and attitude towards genetically modified foods: A quantitative cross-sectional study among the educated subjects in the four largest divisions of Bangladesh

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