A test for paedomorphism in domestic pig cranial morphology.

A test for paedomorphism in domestic pig cranial morphology.
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DOI:
10.1098/rsbl.2017.0321
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发表时间:
2017-08
期刊:
影响因子:
3.3
通讯作者:
Dobney K
Dobney K
中科院分区:
生物学2区
文献类型:
--
作者:
Evin A;Owen J;Larson G;Debiais-Thibaud M;Cucchi T;Vidarsdottir US;Dobney K

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家畜通常被描述为幼年动物,这意味着它们在成年后仍保持着幼年的特征。通过对三个生长阶段的颅骨形态进行三维地标性几何形态分析,我们发现野猪(n = 138)和家猪(n = 106)遵循不同的个体发育轨迹。除了面部和神经颅骨区域之间的大小比例外,幼年型似乎并不是描述野生猪和家猪颅骨形态差异的主要模式。相反,家猪的颅骨表型与驯化过程中的发育创新有关。这一结果质疑了长期以来的假设,即家畜表型是其野生对应物的童胚形式。
Domestic animals are often described as paedomorphic, meaning that they retain juvenile characteristics into adulthood. Through a three-dimensional landmark-based geometric morphometric analysis of cranial morphology at three growth stages, we demonstrate that wild boar (n = 138) and domestic pigs (n = 106) (Sus scrofa) follow distinct ontogenetic trajectories. With the exception of the size ratio between facial and neurocranial regions, paedomorphism does not appear to be the primary pattern describing the observed differences between wild and domestic pig cranial morphologies. The cranial phenotype of domestic pigs instead involves developmental innovation during domestication. This result questions the long-standing assumption that domestic animal phenotypes are paedomorphic forms of their wild counterparts.
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