Genetic basis of adaptive shape differences in the cichlid head
Genetic basis of adaptive shape differences in the cichlid head
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DOI：
10.1093/jhered/esg071
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发表时间：
2003-07-01
影响因子：
3.1
通讯作者：
Kocher, TD
中科院分区：
文献类型：
--
作者：
Albertson, RC;Streelman, JT;Kocher, TD
东非慈鲷表现出非凡的形态多样性。他们成功的关键是营养生物学的巨大辐射，这种辐射在不同的湖泊中迅速而反复地发生。在本报告中，我们迈出了了解慈鲷口腔颌骨设计差异的遗传基础的第一步。我们估计的有效数量的遗传因素，控制慈鲷头部的差异，通过一个全面的形态评估马拉维湖慈鲷物种和他们的F-1和F-2杂交后代。我们估计，1至11个因素之间的个别骨元素的形状差异的基础。我们发现，许多骨骼的差异，在头部和口腔颌骨装置一起继承，这表明一定程度的多效性的遗传结构的字符复杂。此外，我们发现，共分离的形状差异，在不同的元素对应于发展，而不是功能，单位。
East African cichlids exhibit an extraordinary level of morphological diversity. Key to their success has been a dramatic radiation in trophic biology, which has occurred rapidly and repeatedly in different lakes. In this report we take the first step in understanding the genetic basis of differences in cichlid oral jaw design. We estimate the effective number of genetic factors that control differences in the cichlid head through a comprehensive morphological assessment of two Lake Malawi cichlid species and their F-1 and F-2 hybrid progeny. We estimate that between one and 11 factors underlie shape difference of individual bony elements. We show that many of the skeletal differences in the head and oral jaw apparatus are inherited together, suggesting a degree of pleiotropy in the genetic architecture of this character complex. Moreover, we find that cosegregation of shape differences in different elements corresponds to developmental, rather than functional, units.