ชื่อผลงานทางวิชาการ
Population systematics of the snake genus Naja (Reptilia: Serpentes: Elapidae) in Indochina: Multivariate morphometrics and comparative mitochondrial DNA sequencing (cytochrome oxidase I)
ชื่อนักวิจัย
หมวดหมู่ผลงาน
ประเภทผลงาน
บทคัดย่อ
We analyze the population systematics of Asiatic cobras in Indochina, China and the Andaman Islands by means of comparative sequencing of the cytochrome oxidase subunit I gene of the mitochondrial DNA molecule and multivariate analysis of morphological characters. Canonical variate analysis and mtDNA sequence information reveal that the cobras of this region comprise four distinct species: Naja utru from China and northern Vietnam, Naja kuouthiu from Burma, central Thailand, Cambodia and southern Vietnam, Naja siumensis from Thailand, Cambodia and southern Vietnam, and Naja sugittijeru from the Andaman Islands. The subspecies N. kuouthiu suphunensis Nutaphand 1986 shows no mtDNA sequence difference from typical N. kuouthiu from central Thailand, and multivariate analysis does not reveal differences in general phenotypic profile; the subspecies is therefore synonymised with Naja kuouthiu. The cytochrome oxidase subunit I gene, little used in molecular taxonomy, is shown to be well suited for studies at the species level, as it shows taxonomically useful levels of interspecific divergence but low levels of intraspecific variation; this is particularly relevant for studies of rare species, where sample size is a problem. The combination of multivariate morphometrics and molecular systematics can be particularly powerful in resolving systematic problems in such cases.
ชื่อวารสาร
ฉบับที่
8
หน้า
493-510
สำนักพิมพ์
Wiley Blackwell
ปีที่พิมพ์
DOI
10.1046/j.1420-9101.1995.8040493.x
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