Genomic and transcriptomic analyses reveal genetic adaptation to cold conditions in the chickens

High-density single nucleotide polymorphism markers reveal the population structure of 2 local chicken genetic resources

“…In Val Platani, some genes within the 2 detected ROH islands overlapped with homozygous regions reported in chicken ( Strillacci et al, 2018 ; Cendron et al, 2020 ). We identified genes associated with adaptation and survival in hot conditions, such as TRMT1L ( Walugembe et al, 2019 ), TBC1D5 ( Fleming et al, 2017 ), and PTGS2 ( Zhao et al, 2022 ), as well as genes associated with immune ( KCNH8 ) ( He et al, 2015 ) and inflammatory response ( SATB1 ) ( Zhang et al, 2016 ). It is also interesting to note within the ROH island on GGA08 mapped candidate genes related to reproductive physiology in avian species ( PTGS2 and PLA2G4 ) ( Bernini et al, 2021 ), or associated with the regulation of growth and body size ( COL11A1 ) ( Wang et al, 2017 ) and feed intake efficiency ( AMY1A ) ( Zhang et al, 2021 ).…”

Genomic Analysis Reveals Candidate Genes Underlying Sex-Linked Eyelid Coloboma, Feather Color Traits, and Climatic Adaptation in Huoyan Geese

“…In a study on the adaptation of local Chinese domestic chickens to hot, arid and harsh environments, it was revealed that genes related to circulatory and vascular development, neural development, apoptosis, stress response, and fatty acid metabolism were selected [69]. In 2022, Zhao et al found that genes for metabolism, immunity, hair follicle development, blood pressure regulation, and angiogenesis were associated with the cold adaptation of Chinese local chickens [6].…”

“…At present, genomic selection signals have been widely used to analyze environmental adaptations in domesticated animals, such as the genetic mechanisms of adaptation to high altitude and heat and cold in chickens [4,5]. In 2022, Zhao et al used genomic and transcriptomic data to reveal the genetic adaptation to cold conditions in chickens [6]. There are no such studies on geese.…”

Genomic insights into local adaptation and phenotypic diversity of Wenchang chickens

“…After early domestication in southwestern China and Southeast Asia ( Wang et al., 2020 ; Peng et al., 2022 ; Peters et al., 2022 ), chickens spread worldwide through multiple human migrations ( Lawal and Hanotte, 2021 ). Consequently, various local breeds of chickens have been developed, adapted to diverse environmental conditions such as tropical climates ( Tian et al., 2020 ; Xu et al, 2022 ; Shi et al., 2023 ), high altitudes ( Wang et al., 2015 ), and cold tolerance ( Xu et al., 2021 ; Zhao et al., 2022 ; Shi et al., 2023 ). These locally adapted characteristics make these breeds not only an economic foundation for smallholder farmers but also valuable genetic resources for poultry breeding and improvement ( Jia et al., 2016 ; Bettridge et al., 2018 ).…”