毛冠菊属系统位置的核形态证据

中国科学院大学学报 ›› 2000, Vol. 38 ›› Issue (3): 236-241.

毛冠菊属系统位置的核形态证据

刘建全,何廷农,刘尚武

收稿日期:1900-01-01 修回日期:1900-01-01 发布日期:2000-05-10
通讯作者: 刘建全

Systematic position of Nannoglottis Maxim. s.l. (Asteraceae): karyomorphological data

LIU Jian-Quan, HO Ting-Nong, LIU Shang-Wu

Received:1900-01-01 Revised:1900-01-01 Published:2000-05-10
Contact: LIU Jian-Quan

摘要/Abstract

摘要：

首次记载了毛冠菊属2种4居群的核形态资料。两种植物的染色体间期和前期染色体为复杂型

和中间型。狭舌毛冠菊两居群的染色体数目与核型公式为2n＝18＝14m+2sm+2st(2SAT)；毛冠菊两居群的染色体数目与核型公式为2n＝18＝14m+2sm(2SAT)+2st。它们分别代表了整个毛冠菊属的两组植物，并包含了形态学上最原始的种类，因此，该属的染色体基数可能为x＝9。核形态证据表明毛冠菊属放在紫菀族比放在旋覆花族和千里光族中更为合理。

关键词: 毛冠菊属, 核形态, 族的归属

Abstract:

This paper describes for the first time the karyomorphology of 4 populations of 2 species

of Nannoglottis Maxim. s. l. The two species both show the resting nuclei of the complex chromo-

center type and the mitotic prophase chromosomes of the interstitial type. The karyotype formula of

N. gynura is 2n = 18 = 14m + 2sm + 2st(SAT) in two populations while that of N. carpesioides is

2n = 18 = 14m + 2sm(2SAT) + 2st in two populations. The two species under study represent two

sections of Nannoglottis s. l. N. gynura, the only species of sect. Stenolepis, is considered as the

most primitive member of the genus. Accordingly, the basic chromosome number of the genus might

be x＝9. Karyomorphological data indicate that Nannoglottis should be placed in the tribe Astereae

rather than in the Inuleae and the Senecioneae.

Key words: Nannoglottis Maxim., Karyomorphology, Tribal classification

刘建全,何廷农,刘尚武. 毛冠菊属系统位置的核形态证据[J]. 中国科学院大学学报, 2000, 38(3): 236-241.

LIU Jian-Quan, HO Ting-Nong, LIU Shang-Wu. Systematic position of Nannoglottis Maxim. s.l. (Asteraceae): karyomorphological data[J]. , 2000, 38(3): 236-241.