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丰都车前的细胞学研究;兼论它的多倍体起源(英文)
王恒昌;孟爱平;李建强;王勇;陶勇
1.中国科学院武汉植物园;2.中国科学院武汉植物园 湖北 武汉 430074;3.湖北 武汉 430074
摘要:
对长江三峡库区特有濒危植物丰都车前(Plantago erosa var.fengdouensis)进行了细胞学研究,包括有丝分裂和减数分裂两方面.丰都车前可能为一异源四倍体。其核型公式为2n=4x=24=12m(2sat)+12sm(2sat),属于2A型.极端的环境压力尤其是季节性的水淹可能是此四倍体物种形成的主要原因。对同属内的另一物种车前(P.asiatica)进行了比较观察,确证车前为六倍体。该实验为丰都车前的保育遗传学研究提供了细胞学证据。
关键词:  丰都车前    三峡库区    多倍体起源
DOI:
分类号:
Fund project:WuhanBotanicalGardendirectorfund(01035108,01015110) ChineseAcademyofSciences(KSCX2-SW-104)
Abstract:
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