作 者 ：Chin Hui-Chen, Pan Ze-Hui, Sheh Meng-Lan, Wu Chu-Jun
期 刊 ：植物分类学报 1989年 4期
关键词：伞形科染色体数目；
Keywords:Umbelliferae, Chromosome numbers,
Abstract:
This is the third report of chromosome numbers of Umbelliferae after 1981 and
1985, which deals with 24 species and varieties of 15 genera including 2 endemic genera and
10 endemic species, and most of them are distributed in southwestern China. Of them, 18
counts are newly reported. The taxonomic significance is discussed in relation with their
basic numbers, translocation heterozygote and polyploids. It is considered that polyploids are
wide-spread in Hydrocotyle L. 4, 6, 7, 8 are the basic numbers of Bupleurum L. which pro-
vides the cytological evidence for further study on their evolutionary process. n=9 and 10
occurrespectively in two different sections of Pimpinella L. and their basic numbers may be
used for classification at the section level. The ring formation of four chromosomes at dia-
kinesis of Heracleum henryi Wolff reveals that translocation heterozygotes is one of the factors
in specific differentiation of Umbelliferae.