環境差異에 따른 水稻 出穗期 및 稈長의 遺傳變異

Genetic Variations on Days to Heading and Culm Length of Rice in Different Environments

It was carried out the genetic study for days to heading and culm length of rice in different environments. The genetic variation of days to heading was higher than that of culm length in proportion with the different environments. Degree of heterosis on days to heading was remarkable in the direction of late exceeding mid-parent and more higher in the field than in the green-house. Heterosis of culm length was remarkable in the direction of tall in all of two different environments. The mean squares of GCA and SCA for days to heading and culm length were significant in all of two different environments. The mean squares of GCA were higher than those of SCA for two characters. In Vr-Wr graph, days to heading was exhibited by partial dominance in the green-house, over dominance in the field. Culm length was exhibited by over dominance in two different environments.