Abstract: Using 3×4 incomplete diallel,the 3 mothers with resistant BYDV material and the 4 fathers with fertility varieties,the genetic characters of the disease-resistance and the fertility were analyzed.The results show that the heredity of disease-resistance and fertility are of additive-dominant genetic models,being predominant in additive effects;disease-resistance and fertility have a negative correlation, so the materials with tolerance to disease and high yield should be selected.The disease-resistance mother should have higher GCA and lower SCA variance,the father with fertility should have higher SCA variance.