The compressibility of media under extreme pressures
The compressibility of media under extreme pressures
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DOI：
10.1073/pnas.30.9.244
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发表时间：
1944-01-01
影响因子：
11.1
通讯作者：
Murnaghan, FD
中科院分区：
文献类型：
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作者：
Murnaghan, FD
除了将在另一份出版物中讨论的Teffe菌株外，在来自巴西不同地区和危地马拉的Willistoni菌株之间没有观察到性别隔离的痕迹。当巴西男性被提供选择自己或其他巴西品系的雌性时，受精是随机发生的。如果巴西和危地马拉女性的混合被限制在巴西男性或危地马拉男性身上，那么巴西女性受精的比例比危地马拉女性要高。因此，巴西和危地马拉果蝇的交配是选择性的，而不是随机的；然而，这里观察到的特定类型的选择性并不构成基因交换的障碍。
With the exception of the Teffe strain which will be discussed in another publication, no trace of sexual isolation is observed between strains of D. willistoni from different parts of Brazil and from Guatemala. When Brazilian malesare offered a choice of females of their own and of other Brazilian strains, inseminations occur at random. If a mixture of Brazilian and Guatemalan females are confined either with Brazilian or with Guatemalan males, a greater proportion of Brazilian than of Guatemalan females are inseminated. The mating of Brazilian and Guatemalan flies is, therefore, selective rather than random; however, the particular typeof selectivity here observed does not constitute a barrier to gene exchange.