Arnason U, Spilliaert R, Pálsdóttir A, Arnason A
Department of Genetics--Molecular Genetics, Wallenberg Laboratory, University of Lund, Sweden.
Hereditas. 1991;115(2):183-9. doi: 10.1111/j.1601-5223.1991.tb03554.x.
Three anomalous balaenopterid whales, one pregnant female and two sterile males, were investigated by applying molecular approaches in order to establish their identity. The analysis showed that the whales were species hybrids between the blue and the fin whales. The female and one of the males had a blue whale mother and a fin whale father. The other male had a fin whale mother and a blue whale father. The difference between the mitochondrial cytochrome b gene of the two species suggests that they separated greater than or equal to 3.5 million years ago. The sequences of the mitochondrial control region of the blue and the fin whales differ by 7%. The difference in the mtDNA control region between three blue whale mtDNA haplotypes was less than or equal to 1%, about one tenth of the difference between the two species.
通过应用分子方法对三头异常的须鲸进行了研究，其中一头为怀孕雌性，另外两头为不育雄性，以确定它们的身份。分析表明，这些鲸鱼是蓝鲸和长须鲸的物种杂交后代。雌性和其中一头雄性的母亲是蓝鲸，父亲是长须鲸。另一头雄性的母亲是长须鲸，父亲是蓝鲸。这两个物种的线粒体细胞色素b基因差异表明它们在350万年前或更早之前就已分化。蓝鲸和长须鲸线粒体控制区的序列差异为7%。三种蓝鲸线粒体DNA单倍型之间的线粒体DNA控制区差异小于或等于1%，约为两个物种之间差异的十分之一。
