A Preliminary Note on the Karyotypes of Giant Flying Squirrels Petaurista alborufus and P. petaurista
A Preliminary Note on the Karyotypes of Giant Flying Squirrels Petaurista alborufus and P. petaurista
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巨鼯鼠Petaurista alborufus和P. petaurista核型的初步研究
DOI：
10.11238/jmammsocjapan.16.59
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Y. Obara
中科院分区：
文献类型：
--
作者：
T. Oshida;Hiroshi Satoh;Y. Obara
采用常规染色及NOR、G和C分带方法对3种雄性大飞鼠（Petaurista alborufus lena、P. petaurista melanotus和P. petaurista grandis）的核型进行了比较。3个个体的染色体数目相同（2n= 38），基数相同（FN= 72），但Ag-NORs的分布模式不同。它们的X染色体异常大，至少为7.22±O。Y染色体C-带全部阴性。这些与性染色体有关的独特发现值得注意，因为它们是Petaurista属特有的独特核型特征。通过常规染色和G-带、C-带分析，发现白红拟青霉（P. alborufus lena）和棕拟青霉（P. petaurista melanotus）的染色体组成非常相似，而棕拟青霉（P. petaurista）的两个亚种的带型和非带型明显不同，尽管它们目前被归为同种分类群。本文根据染色结果，对Petaurista属三个标本（亚种）的核型系统关系作了简要讨论。
Karyotypes of three male giant flying squirrels (Petaurista alborufus lena, P. petaurista melanotus and P. petaurista grandis) were compared with conventional staining and NOR-, G-and C-banding. All three individuals had the same diploid chromosome number (2n= 38) and the same fundamental number (FN= 72), but the distribution patterns of their Ag-NORs differed. Their X chromosomes were unusually large, being at least 7.22±O. 22 in relative length, and their Y chromosomes were entirely negative for the C-banding. Such unique findings relating to the sex chromosomes are worthy of notice as distinctive karyological features specific to the genus Petaurista. The chromosome constitution of two species P. alborufus lena and P. petaurista melanotus was quite similar to each other, as revealed by conventional staining and G-and C-banding, whereas the banded and non-banded karyotypes of two subspecies of P. petaurista were markedly different from each other even though they are currently classified as conspecific taxa. The karyosystematic relationships among the three specimens (subspecies) of Petaurista are briefly discussed in the light of the result of differential staining.