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<p>The present study has been conducted to estimate the diversity indices and breed composition of crossbred cattle of field using SNP markers. Samples from 81 crossbred animals were collected from various locations in Haryana. All sampled animals were genotyped using Illumina Bovine SNP 50&#xa0;K V3 and information of reference breeds and other established breeds, used for comparative study of field crossbred, were taken from public repository. The estimates of observed &amp; expected heterozygosity in crossbred were 0.352 and the effective population size was 60. Linkage disequilibrium estimates depicted the <i>r</i><sup>2</sup> &gt; 0.2 between SNP pairs at 10–25&#xa0;kb distance. Inbreeding coefficient estimate by F<sub>GRM</sub> method was found to be close to zero and F<sub>ROH</sub> method revealing ancient inbreeding in the population. Result of genetic differentiation showed that the population was close to Holstein Friesian. Breed composition of crossbred was estimated from admixture analysis using 39&#xa0;K SNPs and showed that the HF inheritance level ranged from of 52 to 99 percent in the field conditions. The findings indicated that remarkable genetic variability was present in crossbred cattle, while the exotic inheritance level is exceeding the recommended level.</p>

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Exploring genetic diversity and population structure of field crossbred cattle using genome-wide SNP markers in Indian conditions

  • 期刊论文

  • 发表日期：

    2025年4月19日

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  • Rinki Paul,
  • Rani Alex,
  • Sahana Varadanayakanahalli Narayanaswamy,
  • Ashish Yadav,
  • Kashif Dawood Khan,
  • Shambhuraditya Purushottam Chavan,
  • Vikas Vohra,
  • Gopal Ramdasji Gowane

摘要

The present study has been conducted to estimate the diversity indices and breed composition of crossbred cattle of field using SNP markers. Samples from 81 crossbred animals were collected from various locations in Haryana. All sampled animals were genotyped using Illumina Bovine SNP 50 K V3 and information of reference breeds and other established breeds, used for comparative study of field crossbred, were taken from public repository. The estimates of observed & expected heterozygosity in crossbred were 0.352 and the effective population size was 60. Linkage disequilibrium estimates depicted the r2 > 0.2 between SNP pairs at 10–25 kb distance. Inbreeding coefficient estimate by FGRM method was found to be close to zero and FROH method revealing ancient inbreeding in the population. Result of genetic differentiation showed that the population was close to Holstein Friesian. Breed composition of crossbred was estimated from admixture analysis using 39 K SNPs and showed that the HF inheritance level ranged from of 52 to 99 percent in the field conditions. The findings indicated that remarkable genetic variability was present in crossbred cattle, while the exotic inheritance level is exceeding the recommended level.