摘要或動機

目前生物學知識認為雉科鳥類的性別，在卵受精後即決定(WZ型)，不受環境的影響，但是在本組一連串的實驗中發現，雉科鳥類的性別與孵化的溫度變化有非常大的影響，一般宮廷雞的孵化條件在濕度55％RH及溫度98℉～99℉，在此孵化條件下宮廷雞的子代♀：♂=1：1，若溫度降為97℉的孵化條件下所得子代♀性佔93％，倘若溫度升高為100℉的孵化條件下所得子代♂性佔92％，可見在比正常孵化溫度高的環境下宮廷雞的受精卵會轉變為♂性，而比正常孵化溫度低的環境下孵化的宮廷雞受精卵卻會轉變為♀性，本實驗續做了六代，結果大致相似，由此可以證明控制孵化溫度可以改變宮廷雞的性別，這一行為，可能與Z染色體上一個溫度依賴型的連鎖基因(DMRT1)之表現有關。 ;The temperature of hatching can affect Chinese silkys's sex It is now established that the sex of Pheasants is determined when the egg is impregnated, rather than by environmental factors. However, in a series of experiments, we find that the sex of Pheasants is strongly related to the temperature of hatching. In the normal hatching condition (humidity:55% RH ,temperature: 98.5℉), the ratio of female and male offspring of Chinese silkys is 1:1. If the temperature is lowered to 97℉, the female offspring occupies a proportion of 93%. If the temperature is raised to 100℉, the male proportion will reach 92%. We can thus derive the conclusion: the impregnated eggs of Chinese silkys will be transformed to male at a temperature higher than the normal one, while a lower temperature than the normal one will cause the impregnated eggs to be female. The experiments have been conducted through six generations of Chinese silkys, and the results are practically the same. This indicates that temperature changes can affect gender, This may be related to a Z-linked of DMRT1 gene on the DNA, which is temperature-dependent.