Cytogenetical studies on the speciation and geographical distribution of some higher plants correlating between Japan and China, with special reference to asteraceae.

本文对中国的以下植物类群进行了细胞学研究：1。菊属（菊科）：对14个省区81个居群的600余株菊属植物进行了染色体核型分析，结果表明：菊属植物2n=18;熏衣草lavandulifolium和D.熏衣草seticuspe（日本常见），2n=36。indicum（日本常见）和D. potentilloides，2n=36和54。chanetii ; 2n=54。oreastrum、黑腹叶蝉D. naktongense和D.前庭D. indicum和D. vestitum是新发现的。绘制细胞地理图。成功地获得了中国特有种毛菊与日本菊属8个种的人工杂种F_1代.亚菊属（菊科）：在四川省高原地区采集到亚菊属约7个分类群550株。首次对三个类群的染色体数目进行了研究：A.土木香 ...更多信息 ，2n=36。przewalskii，2n=36。细叶类3.三脉紫菀（菊科）：对来自16个省区的33个三脉紫菀居群进行了细胞学研究。中国的三脉紫菀（Aster ageratoides）是由2x（2n=18）、4x（2n=36）、6x（2n=54）及其自然杂种组成的多倍体复合体。本文绘制了A.绘制了三尖菊多倍体复合体.莎草科：从五个省收集了莎草科七属约40种;其中20种是日本共有的。对苔草属、荸荠属、藨草属和嵩草属9种植物的染色体数目进行了研究。四倍体（2n=24）铁背苔草分布于日本至中国东北地区.兰科及其它科：对中国兰科5种植物的染色体数目进行了研究。中国的盘龙参（2n=30）和高丹（2n=42）的染色体数目与日本的相同。本文报道了采自日本的百合科和野百合属的一些种，并应用染色体分带技术进行了细胞学研究。少

The following plant-groups from China were studied cytologically :1. Dendranthema (Asteraceae) : More than 600 individuals of Dendranthema were collected in 81 populations in 14 Provinces or Regions revealing the following chromosome numbers : 2n=18 in D. lavandulifolium var. lavandulifolium and D. lavandulifolium var. seticuspe (common to Japan) ; 2n=36 in D. indicum (common to Japan) and D. potentilloides ; 2n=36 and 54 in D. chanetii ; and 2n=54 in D. oreastrum, D. naktongense, and D. vestitum. A natural hybrid between D. indicum and D. vestitum was newly discovered. Cytogeographical maps were drawn. Artificial F_1-hybrids between Dendranthema vestitum endemic to China and eight taxa of Japanese Dendranthema species were successfully produced.2. Ajania (Asteraceae) : Five hundred and fifty individual-plants in approximately seven taxa of Ajania were collected in highlands in Sichuan Province. The chromosome numbers in three taxa were studied for the first time : 2n=18 in A. racemosa … More , 2n=36 in A. przewalskii and 2n=36 in A. tenuifolia.3. Aster ageratoides (Asteraceae) : Thirty-three populations of Aster ageratoides from 16 Provinces or Regions were studied cytologically. Aster ageratoides of China composes a polyploid complex of 2x (2n=18), 4x (2n=36), 6x (2n=54) and their natural hybrids similar in occurrence to that of Japan. The cytogeographical map of the A. ageratoides polyploid complex was drawn.4. Cyperaceae : About 40 species in seven genera of the Cyperaceae were collected from five Provinces ; of those 20 species were common to Japan. The chromosome numbers in nine species of Carex, Eleocharis, Scirpus and Kobresia were studied. The tetraploid (2n=24) Carex siderosticta was found to be distributed from Japan to Northeast China.5. The Orchidaceae and other families : The chromosome numbers in five species of the Orchidaceae from China were studied. Spiranthes sinensis (2n=30) and Goodyers procera (2n=42) of China were same in chromosome number to those of Japan. Some species of the Liliaceae and Paeonia (Paeoniaceae) were collected in Japan and studied cytologically by using chromosome banding techniques. Less