Abstract: It is the effective approach of improving phosphorous use efficiency to breed the rice varieties with high phosphorous use efficiency.P1,P2,F1,F2 were made by Yunnan landrance variety Hexi35 (P1)and Yunnan core collection Laolaihong (P2) which has stronger ability of tolerance to low-P.And then,P1,P2,F1,F2 were planted under low phosphorous of soil (6.26 mg/kg) and high level (40 mg/kg) in Yunnan Academy of Agricultural Sciences,Kunming (elevation 1916 m).The inheritance of tiller,grain yield per panicle and total weight of rice was studied by means of a mixed inheritance models of quantitative traits of a major gene plus polygene.This is based on the results showed that tiller,grain yield per panicle and total weight of rice in the combination were expressed in two different combinations were both expressed in majorgene plus polygene and polygene inheritent models.