| 黄精属八种植物的染色体研究 |
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| 引用本文： | 陈少风.黄精属八种植物的染色体研究[J].中国科学院研究生院学报,1989,27(1):39-48. |
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| 作者姓名： | 陈少风 |
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| 作者单位： | (江西大学生物系，南昌) |
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| 摘 要： | 本文研究了四川黄精属Polygonatum 8个种的染色体数目和结构，玉竹n=10，
2n=20=4st十6sm十10m； 多花黄精2n=20＝6sm十14m； 点花黄精n=16,2n＝
32=2t十8st+2sm十20m；滇黄精n=13，2n=26=8st (2SAT)+14sm+4m；互卷黄
精2n=32=6st+8sm+18m (2SAT)； 湖北黄精n=15， 2n=30=2t+6st十6sm+
16m(2SAT)；黄精2n＝24=2t十14st(2SAT)+6sm十2m；卷叶黄精n=28，2n=56=
18st+10sm十28m。
黄精属植物染色体数目和结构的变异类型多样，8种黄精的核型可以区分为3种类型：2
B、3B、2C。核型不对称性的加强与染色体数目的递增有相关性。本文就染色体方面的资料对 前人关于该属分类群的亲缘关系的论述进行了讨论。
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| 关 键 词： | 黄精属 染色体 核型 |
Karyotype Analysis of Eight Species of Polygonatum Mill. |
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| Chen Shao-Feng.Karyotype Analysis of Eight Species of Polygonatum Mill.[J].Journal of the Graduate School of the Chinese Academy of Sciences,1989,27(1):39-48. |
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| Authors: | Chen Shao-Feng |
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| Institution: | (Department of Biology, Jiangxi University, Nanchang) |
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| Abstract: | Meiosis and mitosis of eight species of Polygonatum from Sichuan, China, were
investigated. Ten bivalents (n=10) at meiosis of pollen mother cells were observed ih P. od-
oratum (Mill.) Druce. Meiotic observation on pollen mother cells in P. punctatum Royle ex
Kunth shows 16 bivalents (n=16) at diakinesis, P. kingianum Coll. et Hemsl. 13 bivalents
(n=13) at diakinesis. P. zanlanscianense Pamp. 15 bivalents (n=15) in MI, P. cirrhifolium
(Wall.) Royle 28 bivalents at diakinesis. Somatic chromosomes were observed in root tip cells.
The karyotype formulae are as follows: P. odoratum (Mill.) Druce K(2n)=20=4st+6sm+10m;
P. cyrtonema Hua K(2n)=20=6sm+14m; P. punctatum Royle ex Kunth K(2n)=32=2t+8st+
2sm+20m; P. kingianum Coll. et Hemsl. K(2n)=26=8st(2SAT)+14sm+4m; P. alternicirrho-
sum Hand.-Mzt. K(2n)=32=6st+8sm+18m(2SAT); P. zanlanscianense Pamp. K(2n)=30=
2t+6st+6sm+16m(2SAT); P. sibiricum Delar. ex Redouté K(2n)=24=2t+14st(2SAT)+6sm
+2m; P. cirrhifolium (Wall.) Royle K(2n)=56=18st+10sm+28m. The karyotypes of P.
punctatum, P. kingianum, P. alternicirrhosum and P. cirrhifolium are reported for the first
time.
Both the chromosome number and structure in our materials are certainly different from
thoses in previous reports. Of numerical variation polyploidy and aneuploidy have been record-
ed, and aneuploidy is frequent. According to degree of asymmetry of the karyotype, the 8
species are divided into three types: 2B, 3B, 2C. The increasing asymmetry is correlated with
the increasing of the chromosome number.
There are no obvious differences in chromosome number and karyotype between Alterni-
folia Baker and Verticillate Baker. They are not two natural groups. This opinion is dif-
ferent from that of Therman and Suomalainen. |
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| Keywords: | Polygonatum Chromosome Karyotype |
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