小麥 主要形質의 遺傳 및 選拔效果에 關한 硏究 第1報 小麥의 出穗期 遺傳 및 遺傳率의 地域的 變動

Studies on the Inheritance and Selection Efficiency of Major Agronomic Characters in Wheat I. Regional Variations of Heritabilities and Inheritance in wheat for Heading Date

Segreating F₂ populations of seven wheat crosses were planted in Suweon and in Muan to investigate the regional variations in inheritance and heritabilities of heading date. Among seven F₂ populations, the crosses Chugoku 81×Centurk and Suweon 197× Chugoku 81 gave a 3:1 early to late ratios in F₂ suggesting a single dominant early gene in Chugoku 81. The cross Norin 16×Kanto 75 gave a 7:9 early to late ratio suggesting complementary gene action with lateness dominant. The crosses Strampelli× Chokwang and Suweon 197×Sinkwang gave a 9:7 early to late ratios suggesting complementary genes action with earliness dominant. The crosses Namkwang×Suweon 215 and Norin 4×Bezostaya gave a 1:15 ratio to suggesting duplicate gene action where lateness in dominant. Heading period of the F₂ population in northern Korea teas shorter than that in southern Korea. Broad sense heritabilites in the northern area were lower than that in the southern areas.