Relationship between genetic distance and heterosis under different fertilizer applications in rice.

in the female reaction, but by a dominant gene(s) in the male reaction. The growth of pollen tubes was investigated to examine F2 segregation. The female and male reactions in each plant were estimated by crossing to IR58 and with Akihikari, respectively (Fig. 1). The result showed that the female and male reactions seemed to be independently inherited, suggesting that the gene(s) controlling the female and male reactions could be recombined.