DNA marker를 이용한 벼의 조직배양 효율 재선

Abstract

The purpose of this study is to improve the culturability of a indica type rice cultivar, IR 36, using DNA marker associated with the ability of plant regeneration in anther and seed culture. The varietal difference of ability of callus formation and plant regeneration was investigated in anther and seed culture of 8 rice cultivars. Three japonica rice cultivars showed to have better culturability than those of tongil and indica type genotypes. But two indica/japonica lines, `MGRI 079` and `MGRI 036`, which were selected to have good culturability in previous study showed the highest regenerability (20%) in anther culture of 8 rice cultivars. Thirty four lines were selected by marker screening using RZ400 for 100 lines derived from a cross . The frequency of callus formation of 30 lines was higher than those of `IR 36` in anther culture of the selected lines. The ability of plant regeneration of 15 lines was higher than that of `IR 36` in the seed culture of 34 lines. A promising line, , was selected to have better culturability in the anther and seed culture of the lines. The heading date and grain shape of the was similar to `IR 36`. In seed culture of 50 lines derived from a rice cross , 11 lines including showed to have higher regenerability compared with `IR 36`. The highest frequency of plant regeneration (11%) was obtained from in seed culture of the lines.