A GENETIC STUDY ON ROLE OF RHOTOPERIODIC SENSITIVITY FOR ADAPTATION OF RICE.

用BACKCROSSES方法分离了水稻野生株和栽培株的光周期敏感基因。野生稻和栽培稻晚熟是由于PS值较强所致。分别从野生稻和栽培稻品系中分离到多个PS基因。一个弱PS受一组互补基因控制。一组互补基因和一个额外的PS基因共同控制着水稻和野生稻品系的强PS。通过PS基因和同工酶的连锁，推测抽穗行为与同工酶变异之间存在关联，推测至少有4个基因座控制PS。

THE GENES FOR PHOTOPERIODIC SENSITIVITY WERE ISOLATED BY BACKCROSSES FROM STRAINS OF WILD AND CULTIVATED RICES.1. THE LATE MATURITY OF WILD RICE AND INDICA OF CULTIVATED RICE WAS DUE TO STRONG PS.2. PLURAL GENES FOR PS WERE EACH ISOLATED FROM THOSE STRAINS OF WILD AND CULTIVATED RICE. A WEAK PS OF JAPONICA STRAIN WAS CONTROLLED BY A SET OF COMPLEMENTARY GENES. A STRONG PS OF STRAINS OF INDICA AND WILD RICE WAS CONTROLLED BY BOTH A SET OF COMPLEMENTARY GENES AND AN ADDITIONAL PS GENE.3. AT LEAST FOUR LOCI CONTROLLING PS WERE SUPPOSED JUDGING FROM ASSOCIATION BETWEEN HEADING BEHAVIOR AND ISOZYME VARIATION BY LINKAGE OF GENES FOR PS AND ISOZYMES.