Tsujino Masahiro, Takahashi Kazuo H
Research Core for Interdisciplinary Sciences, Okayama University, Tsushima-naka 3-1-1, Kita-ku, Okayama, 700-8530, Japan.
Genetica. 2014 Apr;142(2):177-84. doi: 10.1007/s10709-014-9765-6. Epub 2014 Apr 18.
Developmental stability, the ability of organisms to buffer their developmental processes against developmental noise is often evaluated with fluctuating asymmetry (FA). Natural genetic variation in FA has been investigated using Drosophila wings as a model system and the recent estimation of the heritability of wing shape FA was as large as 20%. Because natural genetic variation in wing shape FA was found to localize in a partial component of the wings, heritable variation in specific parts of the wings might be responsible for FA estimation based on the whole wing shape. In this study, we quantified the shape of three partial components of the wings, and estimated the heritability of the wing shape FA based on artificial selections. As a result, FA values for the partial wing shape components did not respond to artificial selections and the heritability scores estimated were very small. These results indicate that natural additive genetic variation in FA of partial wing components was very small compared with that in a complex wing trait.
发育稳定性，即生物体缓冲其发育过程以抵御发育噪声的能力，通常用波动不对称性（FA）来评估。利用果蝇翅膀作为模型系统，对FA中的自然遗传变异进行了研究，最近对翅膀形状FA遗传力的估计高达20%。由于发现翅膀形状FA中的自然遗传变异定位于翅膀的部分组件中，基于整个翅膀形状的FA估计可能由翅膀特定部位的可遗传变异导致。在本研究中，我们量化了翅膀三个部分组件的形状，并基于人工选择估计了翅膀形状FA的遗传力。结果，部分翅膀形状组件的FA值对人工选择没有反应，估计的遗传力得分非常小。这些结果表明，与复杂翅膀性状相比，部分翅膀组件FA中的自然加性遗传变异非常小。
