一个尺寸适合所有吗? 大真菌的DNA条形码差距的变化 Genera
Andrew W Wilson1, Ursula Eberhardt2, Nhu Nguyen3
1Denver Botanic Gardens, 909 York Street, Denver, CO 80206, USA.
Journal of fungi (Basel, Switzerland)
|August 25, 2023
概括
了解大真菌中的DNA条形码差距对于真菌多样性研究至关重要. 这项研究揭示了核核糖核体内部转录间隔器 (nrITS) 区域的变异,影响了物种识别的准确性.
科学领域:
- 菌类学 菌类学是指菌类学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 核核糖核体内部转录间隔器 (nrITS) 区域是真菌多样性和分布研究的关键DNA条形码.
- 环境元编码凸显了对强大的真菌DNA条形码编码实践的需求.
- 对大真菌中DNA条形码缺口的有限理解妨碍了精确的物种划分.
研究的目的:
- 为了检查大菌的nrITS区域内的DNA条形码差距.
- 调查影响条形码差距大小的因素,包括序列变异和分类方法.
- 评估对量化真菌物种丰富性和分类学研究的影响.
主要方法:
- 分析了来自717种宏观真菌物种的5146个nrITS序列.
- 使用序列和遗传学数据测量内部和跨特定的双向距离.
- 在ITS1,ITS2和合并的nrITS区域之间对条码间隙变化的比较.
主要成果:
- 条形码间隙大小受到内部和跨特定变异的影响.
- 由于差异较大,ITS2区域的条形码差距比ITS1更大.
- 分类学上的"分裂"与"合"相比,产生了更大的条形码差距.
结论:
- nrITS条形码差距的变化需要对物种丰富性估计进行仔细考虑.
- 了解条形码差距行为对于准确的真菌DNA条形码是必不可少的.
- 建议使用多个分子标记物来证实分类学研究中的物种划分.
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