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Bulletin of Botanical Research ›› 2006, Vol. 26 ›› Issue (3): 356-360.doi: 10.7525/j.issn.1673-5102.2006.03.021

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Karyotype of Chromolaena odorata and Ageratina adenophora

FENG Yu-Long;WANG Yue-Hua;LIU Yuan-Yuan;DING Kai-Yu;   

  1. 1.Kunming Division,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Kunming 650223 2.College of Life Sciences, Yunnan University, Kunming 650091
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-05-20 Published:2006-05-20
  • Contact: FENG Yu-Long
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Abstract: The karyotypes of two species belonging formerly to Eupatorium (Asteraceae) was studied. The karyotype of Chromolaena odorata (L.) R. M. King & H. Robinson was 2n=60=32 m+28 sm, belongings to the “2A” type, while Ageratina adenophora (Sprengel) R. M. King & H. Robinson was 2n=3x=51=30 m+21 sm, belongings to “2B” type. The chromosome number changed greatly in C. odorata, but stable in A. adenophora. A. adenophora could not produce normal pollen, and propagated through apomixis. The seed germination rate was significantly lower in C. odorata than in A. adenophora. But invasiveness was very strong in both C. odorata and A. adenophora. This indicates that seed amount be not related to invasiveness in the two species.

Key words: karyotype, Chromolaena odorata, Ageratina adenophora, seed, invasiveness

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