Comparison of Quantative Genetic Charactors among 4-Way-Cross Hybrid, F_1 hybrids and 4 Inbred Strains of the Mouse.

用下颌骨测量值的多变量分析评价了四交杂种小鼠的繁殖力，在典型判别分析中，杂种F_1下颌骨测量值的第一、第二典型变量均位于原两个近交系下颌骨测量值的中间。四交种的第一、第二典型变量位于杂种F_1的中间位置。四元杂交小鼠的数量性状在原始近交系中处于中间位置，世代稳定，可作为实验动物使用。

Usefulness of 4-way-cross hybrid of the mouse was evaluated by the maltivariate analysis of mandible measurements.In the canonical discriminant analysis, the 1st and 2nd canonical variate of mandible measurment of F_1 hybrid were located on the middle position of those of original two inbred strains. The 1st and 2nd canonical variate of 4-way-cross hybrid was located on the middle position of those of F_1 hybrids. And also, these variates were constant by year.The 4-way-cross hybrid mice were useful as laboratory animals, since quantitative characters might take the middle position among the original inbred strains, and be stable from generation to generation.