小麥 主要形質의 遺傳 및 選拔効果에 關한 硏究 第2報. 小麥의 出穗期에 關與하는 播性, 日長反應, 狹意의 早晩性 및 耐寒性 交配親의 選擇

Studies on the Inheritance and Selection Efficiency of Major Agronomic Characters in Wheat II. Parental Selection for Early Heading on the Basis of the Relationships among Growth Habit, Daylength Response, Earliness in Narrow Sense and Winter Hardiness

In order to select superior parents for early heading, on the basis of growth habit, shortday response, earliness in narrow sense and cold tolerance lines were examined for field heading date. A growth habit tester set was developed. In Korea growth habit degrees of Ⅲ to Ⅳ were best for early heading varieties. Most spring wheats had early field heading dates. Day light insensitive varieties which were early in narrow sense were selected for early field heading. Shortday response showed highly positive correlation with earliness in narrow sense. To test for cold tolerance the wheat was planted on 20㎝ high seed bads in Yeoncheon. The selected cold tolerant varieties showed a negative correlation with field heading date.