Oshida T, Lin L K, Masuda R, Yoshida M C
Zoolog Sci. 2000 Jan 1;17(1):123-8. doi: 10.2108/zsj.17.123.
To elucidate the phylogenetic relationships among four species belonging to the genus Petaurista (P. alborufus castaneus, P. alborufus lena, P. leucogenys leucogenys, P. leucogenys nikkonis, P. petaurista melanotus, and P. philippensis grandis), we investigated the partial sequences (1,068 bp) of the mitochondrial cytochrome b gene for these giant flying squirrels. Phylogenetic trees (NJ, MP, and ML trees) constructed from cytochrome b sequences indicated that P. leucogenys was grouped independently with other species, and that P. philippensis was most closely related to P. petaurista with 99-100% bootstrap values. In addition, two subspecies of P. alborufus did not form a single clade: P. alborufus castaneus from China was most distantly related to the other species, whereas P. alborufus lena from Taiwan was closely related to P. petaurista and P. philippensis with 82-90% bootstrap values. This result suggests that it is reasonable to regard P. alborufus lena as a distinct species from P. alborufus castaneus.
为了阐明巨松鼠属（红颊巨松鼠指名亚种、红颊巨松鼠台湾亚种、白颊巨松鼠指名亚种、白颊巨松鼠日本亚种、黑腹巨松鼠和大赤鼯鼠）四个物种之间的系统发育关系，我们对这些巨型飞鼠的线粒体细胞色素b基因的部分序列（1068 bp）进行了研究。根据细胞色素b序列构建的系统发育树（NJ树、MP树和ML树）表明，白颊巨松鼠与其他物种独立聚类，并且大赤鼯鼠与黑腹巨松鼠的关系最为密切，自展值为99 - 100%。此外，红颊巨松鼠的两个亚种并未形成一个单系分支：来自中国的红颊巨松鼠指名亚种与其他物种的亲缘关系最远，而来自台湾的红颊巨松鼠台湾亚种与黑腹巨松鼠和大赤鼯鼠关系密切，自展值为82 - 90%。这一结果表明，将红颊巨松鼠台湾亚种视为一个与红颊巨松鼠指名亚种不同的物种是合理的。
