一种紫色水稻的遗传及其在光敏不育系育种中应用的研究

Study on the Inheritance of a Purple Rice and Its Use in the Breeding of the Photoperiod Sensitive Genic Male-Sterile Line

研究表明，本院获得的一种紫色水稻的植株色遗传受控于C、A、Pl3个独立基因座位上显性基因的互补作用，另有一独立的显性基因对Pl基因的表达起抑制作用．由于该抑制基因在籼稻中的高频率存在，因而，紫稻与一般绿稻品种杂交F1多表现为绿株．紫稻光敏不育（株）系的不育性表达和配合力表现，均可达到与普通光敏不育系相似的水平．本文还讨论了选育籼型紫稻光敏不育系设想的可行性．

The inheritance of a purple rice in crosses to green rices was investigated. A group of dominant and interactive genes, C, A and Pl, was found to control the expression of the trait and the other independent inhibitor I-Pl-1 to inhibit the effect of the gene Pl. Because of the wide existence of the gene I-PI-1 in indica rice, most of F1 plants of the crosses between purple rice and green cultivars were grcen. The primary study indicated that, for the purple photoperiod-sensitive genic male-sterile lines, the degrecs of the sterility and its stability in the sterile stage, and of the fertility in the fertile stage, and the combining ability levels of the purple rice were as high as the degrees and levels for the green rice. A tentative idea on breeding purple photoperiod-sensitive male-sterile lines of indica rice was suggcsted and its feasibility and advantage was discussed.