Unique inhibitory cascade pattern of molars in canids contributing to their potential to evolutionary plasticity of diet.
Unique inhibitory cascade pattern of molars in canids contributing to their potential to evolutionary plasticity of diet.
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DOI：
10.1002/ece3.436
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发表时间：
2013-02
影响因子：
2.6
通讯作者：
Asahara, Masakazu
中科院分区：
文献类型：
--
作者：
Asahara, Masakazu
发育起源是哺乳动物进化的基本课题，它指导着牙齿形态和牙式的进化。在以前的研究中，建立了一个称为抑制级联模型的发育模型。这个模型可以解释相对臼齿大小的变化和下第三磨牙的缺失，这有时反映了啮齿动物和其他哺乳动物的饮食。在这里，我调查了模式的相对摩尔大小（抑制级联模式）犬科动物，一个类群展示了广泛的饮食习惯。我发现，犬科动物磨牙的种间变异表明了一种独特的抑制级联模式，与啮齿类小鼠和其他先前报道的哺乳动物不同，这种变异反映了饮食习惯。臼齿的这种独特的变异性也在犬科物种的个体变异中观察到。根据这些观察，犬科物种有较大的变异性，在第一磨牙（carnassials）的相对大小，这是功能上的重要食肉动物的饮食适应。总之，抑制级联反应，在啮齿类动物和其他哺乳动物的不同，可能有助于不同的饮食模式，并在犬科动物的平行演变。
Developmental origins that guide the evolution of dental morphology and dental formulae are fundamental subjects in mammalian evolution. In a previous study, a developmental model termed the inhibitory cascade model was established. This model could explain variations in relative molar sizes and loss of the lower third molars, which sometimes reflect diet, in murine rodents and other mammals. Here, I investigated the pattern of relative molar sizes (inhibitory cascade pattern) in canids, a taxon exhibiting a wide range of dietary habits. I found that interspecific variation in canid molars suggests a unique inhibitory cascade pattern that differs from that in murine rodents and other previously reported mammals, and that this variation reflects dietary habits. This unique variability in molars was also observed in individual variation in canid species. According to these observations, canid species have greater variability in the relative sizes of first molars (carnassials), which are functionally important for dietary adaptation in the Carnivora. In conclusion, an inhibitory cascade that differs from that in murine rodents and other mammals may have contributed to diverse dietary patterns and to their parallel evolution in canids.
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DOI：
10.1098/rspb.1951.0034
发表时间：
1951-01-01
期刊：
PROCEEDINGS OF THE ROYAL SOCIETY SERIES B-BIOLOGICAL SCIENCES
影响因子：
--
作者：
GRUNEBERG, H
通讯作者：
GRUNEBERG, H
影响因子：
64.8
作者：
Harjunmaa, Enni;Kallonen, Aki;Jernvall, Jukka
通讯作者：
Jernvall, Jukka
影响因子：
--
作者：
Asahara, Masakazu;Kryukov, Alexey;Motokawa, Masaharu
通讯作者：
Motokawa, Masaharu
影响因子：
64.8
作者：
Kavanagh, Kathryn D.;Evans, Alistair R.;Jernvall, Jukka
通讯作者：
Jernvall, Jukka
影响因子：
2
作者：
Friscia, A. R.;Van Valkenburgh, B.;Biknevicius, A. R.
通讯作者：
Biknevicius, A. R.