大豆高产育种杂交后代目测选择效果的研究

THE STUDY OF VISUAL SELECTION EFFECT ON THE MAIN AGRONOMIC CHARACTERS IN SOYBEAN HYBRIDS FOR HIGH YIELD BREEDING

本试验选用东北农学院常规育种圃中F_2代至F_5代的85个组合和453个品系为试材,以明确目测等级与各主要农艺性状、产量的关系,阐明目测选择的效果,并利用模糊综合评判法对目测选择经验进行理论分析。

85 crosses and 453 strains from F2to F sgenerations in breeding plots of N.E. A. C were used. The objective of this attempt were to estimate the relationship between the visualiselection grade by agrononic characters yield for estimating the effect of the visual selection.The result revealed that nod number on main stern pod numbron main stem pod number per plant seed number per plan had significant positive correiat with weight of seed per plant at the 0. 01 significance difference level. Path analysis suggested that pod number on main stem, seed number per plant and 100-seed weight per plant had a larger positive direct effect on seed weight per plant, but pod number per plant had a larger negative direct on seed weight per plant; therefore, pod number per plant, 100-seed weigth and seed number per plant could be used in indirect selection of weight per plant.Visual selection for population yield were effective on crosses and strains lodging resistance, growth stage were the main ecotype characters that in fluence the visual selectiong rade, in addition, disease resistance also had some effect.A comprehensive evaluation method was first in throduced for analysing the visual selecting the oretically hyt his methed experience of visual selection could be quantitative forevery character therefore, it could give thein experienced breeders some breeding guidance.