眼睛大小没有改变与人工选择相对的telencephalon大小在Guppies (Poecilia reticulata) 的人工选择
Annika Boussard1, Maddi Garate-Olaizola1,2, Stephanie Fong1
1Department of Zoology, Stockholm University, Stockholm, Sweden.
Brain, behavior and evolution
|July 23, 2024
概括
人工选择的telencephalon大小没有改变眼睛的大小. 虽然较大的远脑与更强的视觉反应相关,但眼睛大小保持不变,这表明进化适应速度缓慢.
科学领域:
- 神经科学是一个神经科学.
- 进化生物学 进化生物学
- 比较解剖学的比较解剖学
背景情况:
- 眼睛大小的变化与大脑形态学有关.
- 远脑 (telencephalon) 是脊椎动物的一个关键视觉处理中心.
- 远脑和眼睛大小的共同进化尚未得到充分理解.
研究的目的:
- 为了研究是否对telencephalon大小的人工选择会影响古皮的眼睛大小.
- 为了评估视力敏度的变化,在对telencephalon大小进行选择后.
主要方法:
- 使用的雄性和雌性毛皮犬是人工选择的,用于小型和大型的相对远脑大小.
- 进行了光运动测试,以评估视力敏度作为代理.
主要成果:
- 在选择组之间没有观察到眼睛大小的显著变化.
- 雌性表现出更大的眼睛尺寸,可能是由于身体尺寸或行为差异.
- 较大的远脑与较强的光运动反应相关,但视力敏度没有差异.
结论:
- 毛皮犬的眼睛大小和视觉感知不能快速适应强烈的人工选择对telencephalon大小.
- 表明这些特征在选择压力下的进化速度较慢.
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