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《JOURNAL OF HEBEI VOCATIONTECHNICAL TEACHERS COLLEGE》 1995-02
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STUDY ON THE PRINCIPLE AND APPLICATION OF PREDICTED COMBINED SELECTION INDEX IN ANIMAL BREEDING

Li Xianglong(Dept.of Ani.Sci.HATC,Changli,066600)  
The principle,which included the principle of predicted phenotypic vale combined selec-tion index(PPI)and predicted breeding vale combined selection index(PAI),was discussed in this paper.The calculation formula of improvement of PAI was also given out.The PPI and PAI of Liangshan semi-wool sheep were also shown using the principle above.The results indicated that the combined breeding vale improvrment of PPI and PAI was 1.230 and 1.464 times compared with that of independent culling.The results also showed that the principle of combimed seletion index could be used in the study of early selection in other ani-mals′breeding.
【CateGory Index】: S813.23
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