在矮人和大理石新中,全度测量,性二态,以及伦什法则
Ana Ivanović1, Tijana Vučić1,2,3, Jan W Arntzen2,3
1Faculty of Biology, University of Belgrade, Belgrade, Serbia.
Journal of evolutionary biology
|December 12, 2024
概括
度学解释了新的身体尺寸变化. 雌性特征的性二态度随着身体大小的增加而减少,但较大的物种表现出更的全度倾斜,偏离了Rensch.
科学领域:
- 进化生物学是进化的生物学.
- 比较解剖学的比较解剖学.
- 两动物形态学 两动物形态学
背景情况:
- 体位测量,即体型与其他身体部位之间的关系,是形态变异的关键驱动因素.
- 性尺寸变态 (SSD) 在许多物种中很常见,但其全度基础尚未完全理解.
- 伦什法则预测SSD如何随体型变化而变化,但经验证据有所不同.
研究的目的:
- 调查Triturus (亚种) 内部和间的所有米参数,重点关注T. marmoratus物种群.
- 为了测试体型,头部和四肢尺寸的性尺寸变态的全度测量.
- 根据Rensch的规则,检查种内异构是否影响进化异构.
主要方法:
- 对六种Triturus (亚种) 的外部形态测量.
- 对身体,头部和四肢尺寸的性尺寸二态度的全量学分析.
- 内部特异性全度倾斜与跨特异性进化全度的比较.
主要成果:
- 偏向女性的干部和头部尺寸显示出正方位测量;偏向男性的四肢尺寸显示出异面关系.
- 性别之间的形态差异发生在共同的全米斜率上,主要是通过截图的变化.
- 虽然女性偏见的特征中的SSD随着身体大小的减少而减少 (支持Rensch的规则),但在较大的物种中观察到更的全度倾斜,偏离了理论预期.
结论:
- 在Triturus两动物中,物种内全度学提供了对性二重形态的演变的见解.
- 与伦什规则的偏差突出了全尺度缩放的复杂性及其对进化轨迹的影响.
- 这项研究为未来对两动物的全度量和性二态度进行比较分析奠定了基础.
相关概念视频
Background and Environment Affect Phenotype
6.5K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.5K
Mate Choice
8.0K
Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
8.0K
Types of Selection
40.2K
Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
40.2K


