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Plant Diversity ›› 2007, Vol. 29 ›› Issue (02): 198-200.

• 研究论文 • 上一篇    下一篇

富民枳的核型与分类位置探讨

刘利勤1 , 2 , 杨 静1 , 2 , 顾志建1   

  1. 1 中国科学院昆明植物研究所, 云南昆明 650204; 2 中国科学院研究生院, 北京 100039
  • 收稿日期:2006-05-17 出版日期:2007-04-25 发布日期:2007-04-25
  • 通讯作者: 顾志建

Karyomorphology and Taxonomic Position of Poncirus polyandra (Rutaceae)

LIU Li-Qin1 , 2 , YANG Jing1 , 2 , GU Zhi-Jian   

  1. 1 Kunming Institute of Botany , Chinese Academic of Sciences , Kunming 650204 , China ;
    2 Graduate University of Chinese Academy of Sciences, Beijing 100039 , China
  • Received:2006-05-17 Online:2007-04-25 Published:2007-04-25
  • Contact: GU Zhi-Jian

摘要:

报道了富民枳( Poncirus polyandra) 的染色体核型。间期核和有丝分裂前期染色体分别为球状前染色体型和中间型; 体细胞中期染色体数目为2n = 18 , 核型公式为2n = 2x = 18 = 12m + 6sm (2SAT) ; 核型不对称性类型为1A。将上述结果与前人报道过的枳和枳橙的核型进行比较。根据富民枳、枳和枳橙之间的核型差异, 并结合富民枳形态学、孢粉学、叶片同工酶和分子系统学等方面的研究成果进行综合分析, 我们认为富民枳能够以种的地位存在于枳属中, 且是较枳更为原始的种类。

关键词: 富民枳, 核型, 分类位置FONT

Abstract: A study on Poncirus polyandra was conducted karyologically . The interphase nuclei was observed to be the round prochromosome type , and the prophase chromosome type was the interstitial type . The karyotype of metaphase chromosome in somatic cells is: 2n = 2x = 18 = 12m+ 6sm (2SAT ) . The karyotype belonged to Stebbins′1A type . The karyotypes among P. polyandra , P. trifoliata and Citurus sinensis were compared . Based on the evidence from cytology , palynology , morphology , leaf isozymes and molecular systematics, the systematic position of P . polyandry was discussed . It is more reasonable to place P . polyandra in the genus Poncirus, and it probably represents a more primary species in the genus .

Key words: Poncirus polyandra