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植物物种的性质 植物物种的性质
Loren H Rieseberg1, Troy E Wood, Eric J Baack
1Department of Biology, Indiana University, Bloomington, Indiana 47405, USA. lriesebe@indiana.edu
Nature
|March 24, 2006
概括
植物学家质疑植物物种,但这项研究表明,它们往往是真正的繁殖单位. 定量分析显示,植物物种比动物物种更有可能是生物学上不同的血统.
科学领域:
- 进化生物学是进化的生物学.
- 植物学 植物学
- 动物学 动物学
背景情况:
- 植物学家争论植物物种的客观现实,将它们视为人类的构造,而不是不同的进化单元.
- 以前反对植物物种分离的论点引用了像公英和树这样的例子,缺乏定量数据.
研究的目的:
- 量化测试植物物种的独立性及其生殖独立性.
- 使用定量数据比较植物和动物物种的生物现实.
主要方法:
- 分析了400多个植物和动物属的遗传和交叉关系.
- 对分类学物种和表型集群与生殖上独立的血统的对应性的定量评估.
主要成果:
- 在大多数属中,离散的表型群是常见的 (>80%),但分类学物种在植物和动物中不太符合这些群 (<60%).
- 多体,无性繁殖和分类学过分差异化,而不是杂交,解释了缺乏一致性的原因.
- 植物物种与生殖上独立的血统的对应率高 (70%) 比动物物种 (75%的表型群).
结论:
- 植物物种在很大程度上是生物现实,代表生殖上独立的血统.
- 与普遍认为的相反,植物物种比动物物种更有可能是进化上不同的单位.
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