多omics集成识别了Nellore牛中尸体和肉质特征的分子标记物和生物途径
Gabriela B Frezarim1, Lucio F M Mota2, Larissa F S Fonseca1
1Department of Animal Science, School of Agricultural and Veterinarian Sciences, São Paulo State University (UNESP), Jaboticabal, SP, 14884-900, Brazil.
Scientific reports
|March 27, 2025
概括
这项研究整合了基因组,转录组和蛋白质组数据,以确定影响内罗尔牛尸体和肉质特征的关键生物因素,揭示了改善肉类柔软性,大理石化和背部脂肪厚度的新型基因和途径.
科学领域:
- 动物遗传学和基因组学
- 分子生物学分子生物学
- 肉类科学 肉科学
背景情况:
- 了解尸体和肉质的遗传和分子基础对于改善内罗尔牛生产至关重要.
- 不同表达水平的复杂生物变异影响了诸如肉的柔软度,大理石和背部脂肪厚度等特征.
研究的目的:
- 为了阐明内罗尔牛的尸体和肉质特征的生物控制.
- 通过整合多omics数据来识别涉及这些特征的关键基因,转录,蛋白质和代谢途径.
主要方法:
- 全基因组关联研究 (GWAS) 使用加权单步GBLUP.
- 在具有异异表型值的动物肌肉样本上进行RNA测序 (RNA-Seq) 和蛋白质组分析.
- 对当代群体和年龄进行调整的差异基因和蛋白质表达分析.
主要成果:
- 促进生长的基因 (FRZB,IGFBP5,SEMA6C) 在高肉敏感性组过度表达,而生长抑制剂 (RTN4,RB1) 的下调.
- 与热冲击,结构功能和代谢调节相关的蛋白质与较高的肉的柔软性有关.
- 对于大理石,参与脂肪酸合成的基因被上调,结构蛋白被下调,确定了CAND1,ACTN4,FGFR2和NCOR2等关键基因.
- 参与actin细胞骨组织和微管形成的神经元基因和蛋白质被确定为背部脂肪厚度 (BFT).
结论:
- 这种多学科的方法提供了对内罗尔牛的尸体和肉质特征的分子基础的全面了解.
- 已识别的基因,转录,蛋白质和通路为遗传选择和育种策略提供了目标,以提高肉质.
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