Quantitative trait loci mapping of innate fear behavior in day-old F2 chickens of Japanese Oh-Shamo and White Leghorn breeds using restriction site-associated DNA sequencing.

Autor:	Velasco VV; Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan., Ochiai T; Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan., Tsudzuki M; Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima 739-8528, Japan., Goto N; Hendrix Genetics BU Layers, Boxmeer 5831 CK, The Netherlands., Ishikawa A; Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan. Electronic address: ishikawa@agr.nagoya-u.ac.jp.
Jazyk:	angličtina
Zdroj:	Poultry science [Poult Sci] 2024 Jan; Vol. 103 (1), pp. 103228. Date of Electronic Publication: 2023 Oct 24.
DOI:	10.1016/j.psj.2023.103228
Abstrakt:	Understanding the genetic mechanisms that underlie innate fear behavior is essential for improving the management and performance of the poultry industry. This study aimed to map QTL associated with innate fear responses in open field (OF) and tonic immobility (TI) tests, using an F2 chicken intercross population between 2 behaviorally distinct breeds: the aggressive Japanese Oh-Shamo (OSM) and the docile White Leghorn T-line (WL-T). Genome-wide QTL analysis for the OF and TI traits was conducted using 2,109 single nucleotide polymorphism (SNP) markers obtained through restriction site-associated DNA sequencing (RAD-seq). While several suggestive QTL were identified for TI and OF traits at genome-wide 20% significance threshold levels, the analysis revealed 2 significant QTL for 2 OF traits (total distance and maximum speed) at genome-wide 5% significance threshold levels. These significant QTL were located between 12.34 and 30.49 megabase (Mb) on chromosome 1 and between 40.02 and 63.38 Mb on chromosome 2, explaining 6.75 to 7.40% of the total variances. These findings provide valuable insights for the poultry industry, particularly in refining chicken management strategies and informing targeted breeding efforts. (Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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