Distribution, Properties and Phylogenetic Relations of Asian Upland Rice Varieties

This paper rst compares the general plant properties ofrainf d upland rice varieties with those of lowland rice varieties Then the Asian rice growing region is divided into three subregions the tropical monsoon f()rest rcgion ( lnoist deciduous ) the tropical rainfbrest region and the temperate rcgion ( hard leaf evergreen or broad -ieaf frost deciduous brest ) and the rainfed upland rice varieties established in each regiQn are discussed Close phylogenetic relations are noted betwcen Japanese and Korean upland variedes but it is alse clear that some Japanese upland varieties belong to the rainfed aus ecotype of the indica ecospecies that were established in the monsoon f()rest regien and were introduced into Japan via China and others belong primari y to Japanese lowland rice varieties 1n addition some of the late Japanese upland varicties apPear to have b n introduoed directly from the tropica rainforest rcgion of Southeast Asia