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菌体中可能最早的全聚多化是由 Selaginellaceae 的植物转录组学和形态学揭示的

Jong-Soo Kang¹, Ji-Gao Yu^1,2,3, Qiao-Ping Xiang^1,3

¹State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.

Molecular biology and evolution

|August 5, 2024

概括

血菌类 Selaginella sanguinolenta 很可能起源于三叠纪早期的杂交和多化,代表了在气管细胞中已知的最早的全化. 这一发现解释了其独特的遗传学位置和进化历史.

科学领域:

植物进化生物学植物进化生物学
人类基因组学是什么?
柳叶植物的进化过程

背景情况:

Selaginellaceae是最大的白植物家族,表现出了显著的息地多样性,但缺乏多化.
之前的分类学证实了 Selaginella 的单一性,但在 S. sanguinolenta 类的位置上遇到了困难.
了解S. sanguinolenta类的原生态对于解决白虫的进化历史至关重要.

研究的目的:

为了阐明 Selaginellaceae 的族系,专注于有问题的 S. sanguinolenta 类.
为了调查S. sanguinolenta clade.中遗传学不一致的原因.
确定S. sanguinolenta clade.的进化起源和时间.

主要方法:

基因组学分析使用来自RNA-seq.的大规模核基因数据.
基因流量测试和物种网络推断.
基于质体的细胞系,根和子微观形态学,染色体观测和分歧时间估计.

主要成果:

遗传学分析揭示了S. sanguinolenta clade的三个不同的位置.
证据强烈表明,S. sanguinolenta类的混合起源,涉及两个主要 Selaginellaceae 超级类的祖先.
聚化发生在三叠纪早期,由形态学和遗传学数据支持.

结论:

血红属 (S. sanguinolenta) 类代表了早期气管细胞中杂交起源和全聚化的一种独特案例.
这项研究提供了中生代在气管细胞中全聚化最早的记录.
通过这种混合群体的基因转换,提出了一种保留父母等位基因的假设.

关键词:

这种植物名为 Selaginella sanguinolenta.这种植物是 Selaginellaceae.合多聚化 (allopolyploidization) 是一种全聚化.古代的杂交方式杂交方式柳科菲特 (Lycophytes) 是一种白色植物.核发育学是核发育学的一部分.植物转录组学.整个基因组复制 (WGD)

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