小麥 主要形質의 遺傳 및 選拔効果에 關한 硏究 第3報 小麥小麥育種을 爲한 主要形質의 選拔效果

Studies on the Inheritance and Selection Efficiency of Major Agronomic Characters in Wheat III. Selection Efficiency for Major Agronomic Characters for Wheat Breeding

This experiment was carried out to determine heritabilities, genetic correlations, path co-efficients, selection indexes and genetic advances of major agronomic characters in wheat. Characters with high heritabilities were days to maturity, maturing period, culm length and spike length while those with low heritability were yield and yield components. In Suweon, yield was positively correlated with days to heading, days to maturity, culm length, number of grains per spike and liter weight while in Muan yield was positively correlated with maturing period and 1,000 grain weight and negatively correlated with maturing period. Genetic advance were calculated from the selection indices which were calculated on the basis of a single character and various combinations of several characters. Selection efficency was increased by 1~4% in case it was calculated from the combination two or three characters, but it showed large annual variations.