绞股蓝属5种植物的染色体倍性及核型分析

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doi：10.11733/j.issn.1007-0435.2026.03.005

引用格式：，等.绞股蓝属5种植物的染色体倍性及核型分析[J].草地学报，2026，34（3）：788—795 CHEN Shuang，CAO Feng，LI Dou-dou，et al. Chromosomal Ploidy and Karyotype Analysis of 5 Plant Species of Gynostemma Genus[J]. Acta Agrestia Sinica，2026，34（3） ：788-795

中图分类号：Q343.2+2 文献标识码：A 文章编号：1007-0435（2026）03-0788-08

Chromosomal Ploidy and Karyotype Analysis of 5 Plant Species of Gynostemma Genus

CHENShuang¹，CAO Feng1，LIDou-doul，GUOBao- ⋅lin1∗ ，SUO Feng-mei¹，CAO Xian-jun 2 ，LI Xiao-hu² （1.InstituteofedialPantsevelopntineAcadefedicalce，eig3；.aniiakangclal Technology，Ankang，ShaanxiProvince 725ooo，China）

Abstract： This study employed conventional chromosome squash techniques to analyze the ploidy levels and karyotypes of eight samples from five Gynostemma species，aiming to investigate their evolutionary trends and phylogenetic relationships.The results revealed that alleight samples exhibited a basic chromosome numberof 11.Among them，G. pentaphyllum colected from Fujian Nanjing was tetraploid，while the remaining seven samples were diploid. Satelite chromosomes were observed in two samples. Chromosome types included two categories：m （metacentric） and sm（submetacentric）. Karyotype classifications comprised four types：1A， 2A，1B，and 2B.The ratio of the longest to shortest chromosome ranged from 1.48 to 3.26，with an average arm ratio of 1.26-1. 45. The karyotypic asymmetry coefficient varied between 55.59% and 58.56% .Based on karyotype evolution，the samples were ordered as follows：GXH， WZ>GXY>AH ， FJ>MD ，GXB，YJ. These findings provide cytological evidence for the taxonomic clasification and phylogenetic analysis of Gynostemma species.

Key words：Gynostemma ; Chromosomes;Ploidy;Karyotype

绞股蓝属Gynostemma隶属于葫芦科，属下共包括2亚属17种2变种，中国分布有2亚属14种2变种，广泛分布于秦岭以南地区[1]。（剩余11670字）