解密狗行为特征的遗传基础:观察-特征 GWAS 和潜伏-特征 GWAS 分析揭示关键基因和变异。

IF 2.3 2区 农林科学 Q1 VETERINARY SCIENCES Veterinary journal Pub Date : 2024-10-04 DOI:10.1016/j.tvjl.2024.106251
Maryam Mahmoodi , Ahmad Ayatollahi Mehrgardi , Mehdi Momen , James A. Serpell , Ali Esmailizadeh
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引用次数: 0

摘要

狗表现出显著的表型多样性,尤其是在行为特征方面,这使它们成为研究复杂行为遗传基础的绝佳模型。在不同品种的狗中,攻击性和恐惧等行为特征的遗传率很高,但它们的遗传基础在很大程度上是未知的。我们利用全基因组关联研究(GWAS)找出了与九种行为特征相关的候选基因,包括陌生人指向的攻击行为(SDA)、主人指向的攻击行为(ODA)、狗指向的攻击行为(DDA)、陌生人指向的恐惧(SDF)、非社交恐惧(NF)、狗指向的恐惧(DDF)、触觉敏感(TS)、分离相关行为(SRB)和依恋注意寻求(AAS)。观察到的行为特征来自 108 个现代犬种的 38,714 至 40,460 个个体。我们使用确证因子分析(CFA)方法提取了九种可观察行为特征的潜在特征,在此基础上进行了基因组学分析,并将结果与观察特征的基因组学分析结果进行了比较。利用观察性状和潜在性状 GWAS,我们发现了两种 GWAS 方法共有的 41 个重要 SNPs,其中 26 个具有多重效应,还有 10 个 SNPs 为潜在性状 GWAS 所独有,5 个 SNPs 为观察性状 GWAS 所独有。这些 SNP 与潜伏性状 GWAS 中的 21 个基因和观察性状 GWAS 中的 22 个基因相关,其中 19 个基因为两者所共有。根据以往的研究,本研究中的一些基因与狗的行为和神经功能有关。在人类群体中,这些被发现的基因要么在神经系统的形成中发挥作用,要么与各种精神健康状况有关。综上所述,我们的研究结果表明,针对狗的行为特征的潜在特征 GWAS 发现了重要的潜在基因,这些基因是神经系统的优先基因。
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Deciphering the genetic basis of behavioral traits in dogs: Observed-trait GWAS and latent-trait GWAS analysis reveal key genes and variants
Dogs exhibit remarkable phenotypic diversity, particularly in behavioral traits, making them an excellent model for studying the genetic basis of complex behaviors. Behavioral traits such as aggression and fear are highly heritable among different dog breeds, but their genetic basis is largely unknown. We used the genome-wide association study (GWAS) to identify candidate genes associated with nine behavioral traits including; stranger-directed aggression (SDA), owner-directed aggression (ODA), dog-directed aggression (DDA), stranger-directed fear (SDF), nonsocial fear (NF), dog-directed fear (DDF), touch sensitivity (TS), separation-related behavior (SRB) and attachment attention-seeking (AAS). The observed behavioral traits were collected from 38,714 to 40,460 individuals across 108 modern dog breeds. We performed a GWAS based on a latent trait extracted using the confirmatory factor analysis (CFA) method with nine observable behavioral traits and compared the results with those from the GWAS of the observed traits. Using both observed-trait and latent-trait GWAS, we identified 41 significant SNPs that were common between both GWAS methods, of which 26 were pleiotropic, as well as 10 SNPs unique to the latent-trait GWAS, and 5 SNPs unique to the observed-trait GWAS discovered. These SNPs were associated with 21 genes in latent-trait GWAS and 22 genes in the observed-trait GWAS, with 19 genes shared by both. According to previous studies, some of the genes from this study have been reported to be related to behavioral and neurological functions in dogs. In the human population, these identified genes play a role in either the formation of the nervous system or are linked to various mental health conditions. Taken together, our findings suggest that latent-trait GWAS for behavioral traits in dogs identifies significant latent genes that are neurologically prioritized.
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来源期刊
Veterinary journal
Veterinary journal 农林科学-兽医学
CiteScore
4.10
自引率
4.50%
发文量
79
审稿时长
40 days
期刊介绍: The Veterinary Journal (established 1875) publishes worldwide contributions on all aspects of veterinary science and its related subjects. It provides regular book reviews and a short communications section. The journal regularly commissions topical reviews and commentaries on features of major importance. Research areas include infectious diseases, applied biochemistry, parasitology, endocrinology, microbiology, immunology, pathology, pharmacology, physiology, molecular biology, immunogenetics, surgery, ophthalmology, dermatology and oncology.
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