植物CAD2:一个长文本DNA语言模型,用于跨物种的功能注释在芽细胞
Jingjing Zhai1, Aaron Gokaslan2, Sheng-Kai Hsu1
1Institute for Genomic Diversity, Cornell University, Ithaca, NY USA 14853.
bioRxiv : the preprint server for biology
|September 15, 2025
概括
植物CAD2是一种用于植物的新型DNA语言模型,可以准确预测基因组功能. 它在进化保护和监管架构任务中表现优于现有模型,帮助植物基因组学研究.
科学领域:
- 基因组学就是基因组学.
- 生物信息学是一种生物信息学.
- 计算生物学 计算生物学
背景情况:
- 了解DNA序列功能是一个关键的生物学挑战.
- 开花植物 (芽植物) 拥有复杂的基因组,多样化的物种和可变的基因组大小.
- 这些特征需要植物基因组学专门的模型.
研究的目的:
- 介绍PlantCAD2,一种特定于植物的DNA语言模型.
- 评估其在植物基因组任务上的表现.
- 证明其在捕捉进化的保护和监管功能的能力.
主要方法:
- 预先训练的PlantCAD2在65个血管精子基因组上,具有单核酸分辨率和8,192bp的上下文窗口.
- 对公开基准进行了全面的零射击和微调评估.
- 将PlantCAD2与Evo2和AgroNT模型进行比较.
主要成果:
- 植物CAD2 (676M参数) 在12项进化保护任务中的10项中超过了Evo2 (7B参数).
- 精心调整的PlantCAD2在七个跨物种任务中表现优于AgroNT (1B参数).
- 长背景窗口显著改善了玉米基因组中可访问的染色质预测.
结论:
- 植物CAD2是植物基因组学的强大而高效的基础模型.
- 它可以在各种各样的血管种物种中准确地进行基因组注释.
- 强调了长距离基因组背景对于监管建模的重要性.
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