Kriukov A P, Odati S
Institute of Biology and Soil Sciences, Russian Academy of Sciences, Vladivostok, Russia.
Genetika. 2000 Sep;36(9):1262-8.
To establish phylogenetic relationships within the corvine birds at the interspecific and intergeneric levels, the sequence of the mitochondrial DNA cytochrome b gene was analyzed. The NJ, UPGMA, and MP trees showed similar clustering. Relationships between the jungle crow, on the one hand, and the rook and Australian raven, on the other hand, were closer than between the jungle crow and the hooded and carrion crows. Mitochondrial genome of Australian raven displayed the closest similarity to the ancestral genome of the genus Corvus. Populations inhabiting the eastern part of the carrion crow C. corone orientations area were statistically significantly subdivided into three lineages. These data also confirmed the hypothesis on the location of the carrion crow ancestral lineage in the southeastern part of the area. In general, the transition and transversion substitution levels, their relationships, and distribution over codon positions were similar to that already reported for birds. Synonymous transitions in the third codon position were the prevailing substitution type. Using standard calibration scales, the time of divergence between species and genera within the corvine family was estimated to be 3.1-4 and 3.8-8.8 Myr, respectively. The divergence time between the examined corvine birds and birds of paradise constituted from 8 to 10 Myr.
为了在鸦科鸟类的种间和属间水平上建立系统发育关系,对线粒体DNA细胞色素b基因的序列进行了分析。NJ树、UPGMA树和MP树显示出相似的聚类情况。一方面,丛林鸦与另一方面的白嘴鸦和澳洲渡鸦之间的关系,比丛林鸦与冠小嘴乌鸦和秃鼻乌鸦之间的关系更密切。澳洲渡鸦的线粒体基因组与鸦属的祖先基因组显示出最接近的相似性。居住在秃鼻乌鸦C. corone定向区域东部的种群在统计学上显著细分为三个谱系。这些数据也证实了关于秃鼻乌鸦祖先谱系位于该区域东南部的假设。总体而言,转换和颠换替代水平、它们之间的关系以及在密码子位置上的分布与已报道的鸟类情况相似。第三密码子位置的同义转换是主要的替代类型。使用标准校准尺度,鸦科内物种和属之间的分歧时间估计分别为3.1 - 4百万年和3.8 - 8.8百万年。所研究的鸦科鸟类与极乐鸟之间的分歧时间为8至10百万年。