Abstract
We investigated the RFLP genotypes in 81 accessions of Japanese local and improved O. P. varieties using 4 genomic clones (P-023, P-051, P-061 and P-148 ) and one CDNA clone (C-143). Since four clones (P-023, P-051, P-061 and C-143 ) showed a high gene diversity among the varieties, we thought that these clones were avail-able for some purposes as genetic markers (Table 1). The materials used in this experiment were classified into some varietal groups and ecotypes. The distribution of RFLP genotypes in these groups and ecotypes were not randomized (Table 2). The differences in some agro-nomic characters were found between two varietal groups having the same RFLI) homozygotes, especially in C-143 Iocus (Table 3). The relationships among RFLP genotypes, ecotypes and characters in locus C-143 would be an important information to know the ori-gin of Japanese cucumber.
