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整合具有异质多样化率的化石样本:一个组合的多类型化石出生-死亡模型

Joëlle Barido-Sottani¹, Héléne Morlon¹

¹Institut de Biologie de l'ENS (IBENS), École normale supérieure, CNRS, INSERM, Université PSL, 75005 Paris, France.

Systematic biology

|February 17, 2026

概括

这项研究引入了一种新的多类型化石化出生死亡 (MTFBD) 模型,用于遗传学推断. 在将化石数据与形态信息相结合时,MTFBD模型准确地估计了多样化率和族系.

科学领域:

进化生物学是进化的生物学.
古生物学的古生物学
计算型的遗传学学.

背景情况:

出生死亡模型对于理解物种多样化和遗传学推断至关重要.
现有的模型往往侧重于现存的物种或缺乏谱系特定的速率变化.
整合化石数据和谱系特异率可以改进遗传学和多样化分析.

研究的目的:

在BEAST2框架内引入和实施一种新的多类型化石化出生死亡 (MTFBD) 过程.
共同推断家族系,多样化率和化石采样率,以适应灭绝的和现存的物种.
用模拟和经验数据对现有方法进行MTFBD模型的性能评估.

主要方法:

开发多种类型的化石出生死亡 (MTFBD) 模型.
在BEAST2基因推断软件中实施MTFBD模型.
使用模拟数据集和实证化石数据进行验证,比较具有或没有详细形态信息的结果.

主要成果:

当化石的详细形态数据可用时,MTFBD模型准确地估计了族系和多样化率,特别是灭绝率.
包括化石数据在内,与仅使用现存物种的模型相比,显著提高了准确性.
当缺少形态信息时,MTFBD模型估计会受到先前假设的严重影响.

结论:

该MTFBD模型提供了一个强大的工具,用于联合基因组和多样化推断,特别是具有信息性的化石数据.
使用形态特征准确地放置化石对于可靠的MTFBD模型性能至关重要.
该模型准确地描述了物种化,灭绝和化石采样率在多样化过程中如何变化.

关键词:

贝叶斯的家族遗传推理.化石化出生-死亡过程.多种类型的出生死亡.利率异质性的异质性总的证据总的证据.

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