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洞察马蒂纳·弗兰卡驴品种基于血统和基因组的近亲繁殖模式

V Landi¹, S Ceccobelli², S Bruno³

¹Department of Veterinary Medicine (DIMEV), University of Bari Aldo Moro, 70010 Valenzano, Italy.

Animal : an international journal of animal bioscience

|October 7, 2025

概括

基因组工具提供了比单独的血统更准确的评估临灭绝的马匹的近亲繁殖. 这项研究揭示了马蒂纳·法兰卡驴最近的近亲繁殖,指导了小型马群的保护工作.

科学领域:

保护遗传学保护遗传学
动物基因组学动物基因组学
人口遗传学人口遗传学

背景情况:

临灭绝的马群需要先进的工具来评估传统血统之外的近亲繁殖.
马蒂纳·弗兰卡驴,一个临灭绝的意大利品种,作为马类保护遗传学的典范.
了解历史和最近的近亲繁殖对于有效的保护管理至关重要.

研究的目的:

将血统和基因组数据结合起来,以准确量化马蒂娜·法兰卡驴的近亲繁殖.
为了解开最近和历史的内生繁殖使用 homozygosity (ROH) 的运行.
确定正在选择中的基因组区域,以告知保护战略.

主要方法:

用双消化限制位点相关DNA测序对101只马蒂娜·法兰卡驴进行基因定型.
分析了21,280个高质量的单核酸多态 (SNP).
估计血统近亲繁殖 (F_PED1) 和基因组近亲繁殖 (F_HET,F_HAT1-3,F_ROH).
鉴定同胞性 (ROH) 的特征,以评估最近和古代的近亲繁殖.

主要成果:

基因组杂交 (F_ROH) 提供了一个比血统杂交 (F_PED1) 更详细的图片,两者之间的一致性很弱.
中长的ROH段占主导地位,这表明最近有大量的近亲繁殖.
在特定染色体上确定了ROH岛屿,突出了可能受选择影响的候选基因 (例如SHH,EPAS1,OPRK1,BIRC5).

结论:

基因组方法,特别是F_ROH,在保护遗传学中为评估自性提供了更高的分辨率.
ROH模式揭示了Martina Franca驴的近期杂交和潜在的选择压力.
这些发现为繁殖计划提供了可行的见解,以减轻近亲繁殖和保护临灭绝的马匹的适应变异.

关键词:

保护遗传学保护遗传学实际人口规模实际人口规模.临灭绝的品种种类型基因组多样性基因组多样性运行 homozygosity 的运行.

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