CAJ | 학술논문

尽管古老的鲟形目鱼类的分类及系统演化一直是中外学者感兴趣的研究课题，但迄今仍有诸多谜团未解。其中，关于亚洲远东地区和北美地区的中吻鲟(Acipenser medirostris)的分类地位争论已久。长江水系的达式鲟(A.dabryanus)和中华鲟(A.sinensis)及其它鲟属(Acipenser)鱼类之间的亲缘关系近年来也有异议。为了给上述争议提供更多的科学依据，作者测定了线粒体DNA(mtDNA)控制区 (D-loop) 的核苷酸序列，并进行了分子系统学和遗传差异分析。研究结果表明：⑴UPGMA，NJ和MP分子系统学分析方法以及遗传差异分析都支持了亚洲远东地区中吻鲟和北美中吻鲟为一个有效种的观点；⑵同样研究方法并结合相关群体遗传资料表明，长江达式鲟与中华鲟关系最近，提出了达式鲟为中华鲟的一陆封类群的假说。最后，作者认为本文提出的观点和假说还需要更多的研究来证实。
진관고로적심형목어류적분류급계통연화일직시중외학자감흥취적연구과제，단흘금잉유제다미단미해。기중，관우아주원동지구화북미지구적중문심(Acipenser medirostris)적분류지위쟁론이구。장강수계적체식심(A.dabryanus)화중화심(A.sinensis)급기타심속(Acipenser)어류지간적친연관계근년래야유이의。위료급상술쟁의제공경다적과학의거，작자측정료선립체DNA(mtDNA)공제구 (D-loop) 적핵감산서렬，병진행료분자계통학화유전차이분석。연구결과표명：⑴UPGMA，NJ화MP분자계통학분석방법이급유전차이분석도지지료아주원동지구중문심화북미중문심위일개유효충적관점；⑵동양연구방법병결합상관군체유전자료표명，장강체식심여중화심관계최근，제출료체식심위중화심적일륙봉류군적가설。최후，작자인위본문제출적관점화가설환수요경다적연구래증실。
It has been controversial whether Asian Green sturgeon and American Green sturgeon(Acipenser medirostris) are valid species,and the relationship among Yangtze sturgeon(A.dabryanus) and other species,especially Chinese sturgeon(A.sinensis),has also been confusing.The control region(D-loop) of mitochondrial DNA(mtDNA) was amplified and sequenced to address these problems.Our sequence data support the following hypotheses:(a) Yangtze sturgeon may be the most closely related to the Chinese sturgeon,and is likely to be a landlocked form of Chinese sturgeon;and (b) green sturgeon inhabiting North America and Far East Asia may belong to the same species,A.medirostris.However,more data are needed to test these ideas.