Morphological diversification of the species of the tribe Phaseoleae, Leguminosae in the Ryukyu Archipelago.

Research Project

Project/Area Number	05640781
Research Category	Grant-in-Aid for General Scientific Research (C)
Allocation Type	Single-year Grants
Research Field	系統・分類
Research Institution	The University of the Ryukuys
Principal Investigator	TATEISHI Yoichi Univ. of Ryukyus, Coll. of Education, Associate Professor, 教育学部, 助教授 (80114544)
Project Period (FY)	1993 – 1994
Project Status	Completed (Fiscal Year 1994)
Budget Amount *help	¥2,100,000 (Direct Cost: ¥2,100,000) Fiscal Year 1994: ¥700,000 (Direct Cost: ¥700,000) Fiscal Year 1993: ¥1,400,000 (Direct Cost: ¥1,400,000)
Keywords	The Ryukyu Archipelago / Okinawa Islands / Trive Phaseoleae, Leguminosae / Morphological Diversification / Glycine koidzumii / Glycine tabacina / Glycine subgenus Glycine / Pterocarpus in Ishigaki Isl. / マメ科 / インゲンマメ連
Research Abstract	1)Glychine Koidzumii is a clearly distinct species from G.tabacina which is distributed widely from Australia, through Micronesia and Philippines to Taiwan and has been sometimes conspecific with the G.koidzumii. These two species are clearly distinguished by leaf, pod and flower morphology. Moreover, as a result of the comparative study of the Asiatic species of this genus, it is found that G.koidzumii is rather nearer to G.dolichocarpa, which is endemic to Taiwan. Comparing to G.tabacina and G.dolichocarpa, G.koidzumii is characteristic in having small pods withfewer seeds and ovate monomorphic leaflets. 2) Glycine koidzumii is restricted in Miyako Island and Nothern Peninsula of Ishigaki Island, where it trailing on windy rocky cliff. G.koidzumii is seemed to have been survived in such a poor surroundingwith less nutrition and strong wind. 3) Vigna minima var.minor, restricated to Taiwan, Yaeyama and Miyako Islands, is a form with small rounded leaflets and smaller pods with less seeds than var. minima. 4) Okinawan plant of Vigna vexillata, which is distributed widely in tropics and subtropics, is characteristic in having small leaves, flower, pods and seeds. 5) Rhynchosia minima f.nuda is supported as a geographical races of typical R.minima. 6) A tendencies to smaller and rounded leaves and smaller pods with fewer seeds are found in some species of tribe phaseoleae. 7) Pterocarpus of Ishigagki, which has long been considered as P.indicus distributed India and S.E.Asia, seems to be distinct species having characteristic spined pods.