Indian Journal of Animal Research
SCOPUSWeb of Science
  • Year: 2026
  • Volume: 60
  • Issue: 1

In-depth Pedigree Analysis and Inbreeding Effect on Reproduction Traits in Sahiwal Nucleus Herd

  • Author:
  • Shabahat Mumtaz1*, Anupama Mukherjee1, Prajwalita Pathak2, Kaiser Parveen3
  • Total Page Count: 6
  • Page Number: 27 to 32

1Division of Animal Genetics and Breeding, ICAR-National Dairy Research Institute, Karnal-132 001, Haryana, India.

2ICAR-National Research Centre on Pig, Guwahati-781 015, Assam, India.

3Division of Animal Genetics and Breeding, College of Veterinary Science and Animal Husbandry, Durg-491 001, Chhattisgarh, India.

*Corresponding Author: Shabahat Mumtaz, Division of Animal Genetics and Breeding, ICAR-National Dairy Research Institute, Karnal-132 001, Haryana, India. Email: mumtaz.shabahat@gmail.com

Abstract

Loss of genetic diversity is allied with adverse incidents such as inbreeding depression in fitness related traits, addiction of favorable alleles and enhances fluctuation on selection response. Therefore, the study aims to monitor population structure and avoid unfavorable effects of inbreeding for sustainable improvement in breeding programme.

Pedigree information on 3449 animals born from 1955–2018 was analyzed. The effect on inbreeding on Age at first calving (AFC), Service period (SP), Daughter pregnancy rate (DPR), Calving interval (CI) and pregnancy rate was seen by regression analysis.

The pedigree completeness index (PCI) were found to be (%) 92.32, 80.26, 65.22, 49.43% and 32.54 respectively from first to fifth generations. The estimated average inbreeding rate was 2.30% and average genetic diversity loss was 2.64%. Study also revealed significant effect of inbreeding on (AFC, CI and SP) with slightly increasing trends. Hence, it is suggested that more precise pedigree recording and planned mating strategies should be adopted to avoid negative effect of inbreeding in future generation.

Keywords

Genetic diversity, Inbreeding, Pedigree analysis, Population structure, Sahiwal cattle