Cattle Genetic Resources and their Conservation in Bangladesh

Hamid, Md. Abdul; Rahman, Azman Bin A; Zaman, M. A.; Hossain, Kamal

doi:10.3923/ajas.2017.54.64

Cited by 27 publications

(38 citation statements)

References 6 publications

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“…Where b the average is number of samples per cluster (15) and ρ is the intra-cluster correlation coefficient. The intra-cluster correlation coefficient for bTB is considered to be 0.2 [23].…”

Section: Calculation Of Sample Size and Sampling Proceduresmentioning

confidence: 99%

Bovine tuberculosis prevalence and risk factors in selected districts of Bangladesh

et al. 2020

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A cross-sectional survey was conducted in selected districts of Bangladesh to estimate the prevalence of bovine tuberculosis (bTB), and to identify the risk factors for bTB. We included 1865 farmed cattle from 79 herds randomly selected from five districts. Herd and animal level data were collected using semi-structured interviews with cattle herd owners. The single intradermal comparative tuberculin test (SICTT) was used to estimate the prevalence of bTB. The risk factors were identified using mixed-effect multiple logistic regression analyses. The overall herd and animal level prevalences of bTB were estimated to be 45.6% (95% Confidence Interval [CI] = 34.3–57.2%) and 11.3 (95% CI = 9.9–12.8%), respectively, using the OIE recommended >4 mm cut-off. The true animal level prevalence of bTB was estimated to be 11.8 (95% Credible Interval = 2.1–20.3%). At the herd level, farm size, bTB history of the farm and type of husbandry were significantly associated with bTB status in univariable analysis. Similarly, age group, sex, pregnancy status and parity were significantly associated with bTB at cattle level. However, in multivariable analysis only herd size at the herd level and age group and pregnancy status at the cattle level were significant. Compared to a herd size of 1–10, the odds of bTB were 22.8 (95% CI: 5.2–100.9) and 45.6 times (95% CI: 5.0–417.7) greater in herd sizes of >20–50 and >50, respectively. The odds of bTB were 2.2 (95% CI: 1.0–4.5) and 2.5 times (95% CI: 1.1–5.4) higher in cattle aged >3–6 years and > 6 years, compared to cattle aged ≤1 year. Pregnancy increased the odds of bTB by 1.7 times (95% CI: 1.2–2.4) compared to non-pregnant cattle. Taken together, the results suggest high herd and animal level prevalence of bTB in these 5 districts, with the greatest risk of bTB in older and pregnant cattle within large herds (>20), and highlight an urgent need for continued surveillance and implementation of bTB control programs in Bangladesh.

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Section: Calculation Of Sample Size and Sampling Proceduresmentioning

confidence: 99%

Bovine tuberculosis prevalence and risk factors in selected districts of Bangladesh

et al. 2020

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“…The formulation of the THI (1.8T + 32) − (0.55-0.0055 RH) (1.8T-26) was based on the National Oceanic and Atmospheric Administration (1976), which was used to estimate thermal tolerance traits. Here, Bos indicus were used as the positive control due to extreme environments, such as the high temperature and the high burden of parasites in African and Asian regions [26,27], whereas Angus was regarded as the negative control due to its lesser ability to regulate heat stress, when compared to Bos indicus. Bos indicus carried more of the genes associated with heat tolerance [28,29].…”

Section: Animal Source Dna Preparation and Data Collectionmentioning

confidence: 99%

Association of HSF1 Genetic Variation with Heat Tolerance in Chinese Cattle

Rao

Zeng

Guan

et al. 2019

Animals

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The heat shock factor 1 (HSF1) gene is a regulator of the heat stress response, maximizing HSP protein expression survival. In this research, we explored the frequency distribution of a missense mutation (NC_037341.1 g.616087A > G, rs135258919) in the HSF1 gene in Chinese cattle with amino acid substitution, valine to alanine. This mutation could be related to the heat tolerance in Bos indicus. A total of 941 individuals representing 35 Chinese native cattle breeds, combining pure taurine (Angus) and indicine cattle, were used to determine the genotypes of the mutation through PCR and partial DNA sequencing. The results showed significant differences in allele frequencies and their genotypes amongst Chinese cattle from different regions. Allele G or indicine-specific allele frequency diminished from south to north China, while allele A (genotype AA) or the taurine-specific allele had a contrary pattern, which agreed with the distribution of taurine and indicine cattle. According to the association analysis, the NC_037341.1 g.616087A > G (rs135258919) of the bovine HSF1 gene, annual temperature (T), relative humidity (RH), and the temperature humidity index (THI) (p < 0.01) were interrelated closely, which indicated that the NC_037341.1 g.616087A > G of the HSF1 gene is associated with heat tolerance in indicine cattle.

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“…; Hamid et al . ). There is a growing interest in the characterization and exploitation of unique adaptive traits found in locally adapted breeds, particularly in the face of the changing climate (Hoffmann ).…”

Section: Introductionmentioning

confidence: 97%

“…; Hamid et al . ). Compared to tropical zebu cattle, temperate B. taurus breeds such as Holstein, Jersey, Angus and Hereford have been more intensively selected for dairy (Holstein and Jersey) or beef traits (Angus and Hereford) (Porto‐Neto et al .…”

Section: Introductionmentioning

confidence: 97%

Genome‐wide scan reveals divergent selection among taurine and zebu cattle populations from different regions

Edea

Dadi

Dessie³

et al. 2018

Animal Genetics

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In this study, to identify genomic signatures of divergent selection, we genotyped 10 cattle breeds/populations (n = 275), representing eight Ethiopian cattle populations (n = 229) and two zebu populations (n = 46) adapted to tropical and sub-tropical environments, using the high-density single-nucleotide polymorphisms (SNPs) derived mainly from Bos indicus breeds, and using five reference taurine breeds (n = 212). Population genetic differentiation (F ST ) values across sliding windows were estimated between zebu and reference combined taurine breeds. The most differentiated regions (F ST ≥ 0.53), representing the top 1% smoothed F ST values, were considered to represent regions under diversifying selection. In total, 285 and 317 genes were identified in the comparisons of Ethiopian cattle with taurine and Asian zebu with taurine respectively. Some of these genes are involved in stress responses/thermo-tolerance and DNA damage repair (HSPA4, HSF1, CMPK1 and EIF2AK4), pigmentation (ERBB3 and MYO1A), reproduction/fertility (UBE2D3, ID3 and PSPC1), immune response (PIK3CD and AKIRIN2) and body stature and size (MBP2, LYN and NPM1). Additionally, the candidate genes were associated with functional terms (e.g. cellular response to stress, DNA repair, inflammatory response) important for physiological adaptation to environmental stresses. The results of our study may shed light on the influence of artificial and natural selection in shaping the genomic diversity of modern cattle breeds and also may serve as a basis for further genetic investigation of traits of tropical adaptation in cattle.

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Cattle Genetic Resources and their Conservation in Bangladesh

Cited by 27 publications

References 6 publications

Bovine tuberculosis prevalence and risk factors in selected districts of Bangladesh

Bovine tuberculosis prevalence and risk factors in selected districts of Bangladesh

Association of HSF1 Genetic Variation with Heat Tolerance in Chinese Cattle

Genome‐wide scan reveals divergent selection among taurine and zebu cattle populations from different regions

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