It is reported that computers were used in the gradual regression and the path analysis of the breeding value of 193 characters of 27 high-yield early-rice varieties and 36high-yield late-rice varieties on the basis of experiment data in 1989 and 1990 in this article,The results were tested with x~2 tests and accurancy calculate tests and their effects were ideal.The choice characters set up by regression and path analysises did not only provide basis ofchoice of charater for hydrid parent plant and hydrid progeny of rice but also opened a...
