The segregation mode of plant height in the crosses of rice cultivars, 12; genetic segregation of dominant dwarf gene D-53
1988
Heu, M.H. | Kim, Y.K. | Koh, H.J. | Kwon, H.J. (Seoul National Univ., Suwon (Korea R.). Coll. of Agriculture)
A rice genetic stock F1 282, which has D-53 gene (formerly reported as Dk-3 by Iwata), was crossed with three dwarf cultivars Seolak, Fukei 71 and Waesung 5, one recessive tall cultivar Davis 80 and two ordinary cultivars PI 1 and Onne mochi, and their culm and internode lengths were tested for their parents, F1 S and F2 S. The culm length of F1 S plants of the crosses F1 282/PI 1 and F1 282/Davis 80 were shorter than their dwarf parent, meaning that the dwarfness of F1 282/Waesung 5 and F1 282/Onne mochi were taller than their taller parent, implyig that there are some genetic interactions between the two parental genotypes. The F1 plants of the crosses F1 282/Seolak and F1 282/Fukei 71 were as short as their parents. For the culm length of F2S, in the crosses F1 282/Seolak and F1 282/Fukei 71, the segregation ratio of short; tall= 13 : 3 were observed. In the cross of F1 282/PI 1, the ratio was short; tall= 3 : 1, and in the cross F1 282/Davis 80 it was short;tall= 15 : 1. In the cross of F1 282/Waesung 5 the ratio was short; tall= 15; 1. In the cross F1 282/Waesung 5 the ratio was short; tall=3 :13, and in the cross F1 282/Onne mochi no distinct segregation pattern was observed. In all the crosses, the liguless segreated normally. This may imply that no distorted segregation due to gametic competition or improper population size etc. was involved
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