Study on the Correlation between SSR Molecular Markers and Rice Heterosis

[Objective] The aim was to discuss the correlation between genetic distance of SSR markers and rice heterosis.[Method] With 5 male sterile lines and 4 restorer lines as tested materials,20 hybridized combinations were compounded on the basis of 5 × 4 NC Ⅱ method.Thirty-six pairs of specific SSR markers(markers linked to QTL) related to rice yield and 124 pairs of non-specific SSR markers(general markers) were selected for performing polymorphism analysis on 9 tested parents so as to study the correlation between genetic distance of SSR markers and rice heterosis.[Result] The correlations between genetic distance of specific SSR markers and traits heterosis of rice generation F1 were not significant.But the genetic distance of non-specific SSR markers showed significant and extremely significant positive correlations with the heterosis in plant height and 1 000-grain weight,resp.and showed significantly negative correlation with seed setting rate.the genetic distance of specific SSR makers related to the heterosis of rice yield per palnt more closely.[Conclusion] There was a certain correlation between the genetic distance of SSR markers and rice heterosis,but their correlation coefficient was too small to predict rice heterosis.