Abstract
The present study was conducted to identify the polymorphism of estrogen receptor (ESR) gene and its biological association with litter traits (litter size at birth, litter size at weaning, litter weight at birth and litter weight at weaning) of Doom pigs native to Assam. A total of 50 adult pigs (12 males and 38 females) chosen randomly from three different herds (Herd I, Herd II, and Herd III) were utilized in the present study. Detection of polymorphism of ESR gene was done by means of PCR-RFLP method. The amplified PCR product was digested with Pvu II restriction enzyme. PCR-RFLP analysis of ESR gene revealed polymorphic banding pattern. Two genotypes viz. AA and AB were identified. AA genotype yielded one fragment (120 bp) and AB genotype yielded three fragments (120, 65, and 55 bp). BB genotype was not found in the population under study. The frequencies of A and B alleles were found to be 0.650 and 0.350, respectively, and the genotypic frequencies of ESR gene were found to be 0.300 and 0.700 for AA and AB genotypes, respectively. There was no significant (P > 0.05) effect of ESR genotype on litter traits and the population under study was not in Hardy-Weinberg Equilibrium for ESR gene. Clustal W Multiple alignment of partial sequence of ESR gene revealed single nucleotide changes at 33, 65, 70, 83, and 92nd nucleotide positions. The presence of Pvu II polymorphism and identification of single nucleotide variation of ESR gene opens interesting prospects for improvement of litter traits in Doom pig through selective breeding program, especially based on marker-assisted selection.
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Abbreviations
- ESR:
-
estrogen receptor
- DNA:
-
deoxyribonucleic Acid
- EDTA:
-
ethylenediamine tetraacetic acid
- PCR:
-
polymerase chain reaction
- RFLP:
-
restriction fragment length polymorphism
- SDS:
-
sodium dodecyl sulfate
- OD:
-
optical density
- DMRT:
-
Duncan’s multiple range test
- Bp:
-
base pair
- SNP:
-
single nucleotide polymorphism
- LSM:
-
least squares mean
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Acknowledgements
The authors thankfully acknowledge Assam Agricultural University (AAU), Khanpara, Assam, India, for providing the necessary facilities to conduct the research. The authors also acknowledge Molbiogen (Apical Scientific) for their significant contribution in the experiment.
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Assam Agricultural University, Khanapara, India-781022
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MR: Conducted the experiment, AP: Design and guided the experiment, GUZ and AD: Statistical Analysis, FA and ST: Molecular analysis of data, HC and LMS: Helps in data collection, recording and manuscript writing.
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The Research was conducted after getting approval from Institutional Animal Ethics Committee (IEAC), AAU, Khanapara, India-781022 (Approval No. 770/ac/CPCSEA/F.V.Sc./AAU/IEAC/17-18/477).
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Rahman, M., Phookan, A., Zaman, G.U. et al. Allelic variability of estrogen receptor (ESR) gene and its effect on litter traits of Doom pigs. Trop Anim Health Prod 53, 316 (2021). https://doi.org/10.1007/s11250-021-02756-6
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DOI: https://doi.org/10.1007/s11250-021-02756-6