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剧情加剧:Letharia中的哈普洛伊德和三倍状的塔利,杂交和偏差的交配类型比率
Sandra Lorena Ament-Velásquez1, Veera Tuovinen1,2, Linnea Bergström1
1Department of Organismal Biology, Uppsala University, Uppsala, Sweden.
Frontiers in fungal biology
|September 25, 2023
概括
莱萨里亚真菌通常是单体和异体,具有三体状的信号,由杂交解释. 交配类型分析显示,北美的性繁殖平衡,但欧洲的无性繁殖偏差.
科学领域:
- 菌类学 菌类学是指菌类学.
- 基因组学就是基因组学.
- 生殖生物学 生殖生物学
背景情况:
- 柳真菌共生体的繁殖生物学是复杂的.
- 最近的基因组研究表明,在Letharia中存在类似三倍体的信号,这挑战了人们对平分体的普遍信念.
研究的目的:
- 在Letharia的内基因组组织和繁殖.
- 研究Letharia*真菌的繁殖和交配系统.
- 从经典的系统和最近的基因组研究中协调相互矛盾的数据.
主要方法:
- 来自纯种植物和谷物基因组数据的分析.
- 在自然种群中对交配类型 (MAT) 位点进行PCR调查.
- 阅读计数变异分析以推断基因组组织.
主要成果:
- 在 *Letharia* 标本中的读数变化与平分化一致.
- 来自L. lupina* thalli的元基因组数据显示了类似三体的读数.
- 在整个属中发现了一种保存的异体性交配类型的位配置.
- 交配类型的分布表明,在北美广泛的性繁殖,但在欧洲占主导地位的无性.
结论:
- *Letharia*真菌是异质的,通常是单体的.
- 三胞胎状的个体很可能是*L. lupina*和一个未知的*Letharia*血统之间的杂交.
- 性繁殖在北美很普遍,而无性繁殖在欧洲占主导地位,因为*L. vulpina*.
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