ISSN : 2663-2187

An integrated analysis of genomics and environment uncovers the determinants of local adaptation in chicken populations

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Krubaa P, Dr.Subbulakshmi Ganesan, Dr. Sneha Verma, Abdul Khalid, Dr.Parthasarathy S, Dr.Suchitra MR
» doi: 10.33472/AFJBS.6.3.2024.65-74

Abstract

Examining the genetic signatures associated with historical temperature driven selection provides valuable insights into local adaptation and the potential impacts of climate change on long term population dynamics. Given its parallel domestication history with human activity and remarkable genetic diversity, the chicken emerges as a crucial species for investigating genetic adaptability. Despite the significance of understanding how chickens express genetic adaptability to both tropical and icy environments, limited research has explored this aspect. This study conducted whole-genome sequencing of domesticated chickens, encompassing various breeds arranged based on breeding environment temperatures, ranging from more tropical to more arctic, and identified SNPs indicated a significant connection with apparent fluctuations in allele frequencies. This research analyzed a total of 87 whole genome sequences sourced from various populations, including 3 domestic chickens, 6 Red jungle fowl, 4 kadaknath chickens, 8 Kashmir Faberella, 2 Aseel chickens. The dataset comprised publicly available sequence data with coverage ranging from 8× to 14, along with recently sequenced genomes having an average depth of 30. Across all 87 genomes, we identified a total of 91,053,192 autosomal single nucleotide polymorphisms (SNPs).The findings provide a valuable tool for the selective breeding of hens and provide a glimpse into the temperature-related stress might lead to selection impacts that produce adaptive genetic adaptations in poultry for tropical and neutral climates.

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