杆和头骨形状的机体遗传变化,在形和未形的雀中发生
Megan A Holmes1, Claire E Terhune2, Janine Chalk-Wilayto3
1Department of Family Medicine and Community Health, Duke University School of Medicine, Durham, North Carolina, USA.
Journal of morphology
|May 5, 2024
概括
形 (Sapajus) 和未形 (Cebus) 在生命早期表现出明显的头骨发育和杆作用. 萨帕尤斯灵长类的灵长类表现出更大的杆作用,这与它们机械上具有挑战性的饮食有关,在本体发生的早期出现.
科学领域:
- 灵长类动物解剖学和进化生物学
- 发育生物学和生物力学
- 比较形态学和功能分析.
背景情况:
- 养生态驱动面发育和功能需求在本体发生过程中.
- 卡普奇尼 (Cebus和Sapajus) 呈现出不同的饮食行为和食挑战.
- 了解发育轨迹对于解释成人形态学至关重要.
研究的目的:
- 为了研究头骨形态和下巴杆在Sapajus和Cebus羊的本体发生.
- 为了确定这些灵长类物种在发育过程中形状和肌杆如何演变.
- 为了探索骨形状和下巴杆在本体发生过程中的协同变化.
主要方法:
- 几何形态测量应用到Sapajus和Cebus头骨的3D表面模型 (n=53).
- 分析牙对牙轮,牙轮和牙轮中间肌肉的杆作用.
- 两块部分最小平方分析以评估头骨形状和杆估计之间的协差.
主要成果:
- 头骨形状很早就有所不同,在整个发育过程中,Sapajus和Cebus之间存在显著的差异.
- 杆随着年龄和牙排位置的增加而增加,在永久牙的Sapajus中更大.
- 与Cebus不同的是,Sapajus在前牙的杆估计和面形状之间显示出显著的协变性.
结论:
- 萨帕尤斯和塞布斯在本体发生的早期表现出明显的面发育和下巴杆模式.
- 在Sapajus的形态和杆的差异可能是利用机械上具有挑战性的食物的适应.
- 早期的本体遗传分歧凸显了灵长类动物面可塑性的适应意义.
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