アジアの陸稲,その分布と特性と系譜(<特集>渡部忠世教授退官記念号 : 熱帯アジアの稲と稲作)

Abstract

This paper first compares the general plant properties of rainfed upland rice varieties with those of lowland rice varieties. Then the Asian ricegrowing region is divided into three subregions, the tropical monsoon forest region (moist deciduous), the tropical rainforest region, and the temperate region (hard leaf evergreen or broad-leaf frostdeciduous forest), and the rainfed upland rice varieties established in each region are discussed. Close phylogenetic relations are noted between Japanese and Korean upland varieties; but it is also clear that some Japanese upland varieties belong to the rainfed aus ecotype of the indica ecospecies that were established in the monsoon forest region, and were introduced into Japan via China; and others belong primarily to Japanese lowland rice varieties. In addition some of the late Japanese upland varieties appear to have been introduced directly from the tropical rainforest region of Southeast Asia.