关键词: RAPD标记, 遗传距离,

Abstract: Abstract:The genetic distances between 6 parental lines of pig, which were Landrace (♂), Landrace (♀), Large White (♂), Large White (♀), Meishan (♂) and Meishan (♀), were detected with RAPD, and the heterosis percentages of 10 economic traits were also calculated for F1 generations of Meishan×Large White, Large White×Meishan, Landrace×Large White and Large White×Landrace. Correlative analyses were then performed between genetic distances and heterosis percentages. Results showed that genetic distances were positive correlated with heterosis percentage of average daily gain, ratio of feedstuff to lean meat, carcass yield and average backfat thickness, while negative correlated with that of lean percentage, ratio of lean meat to fat, lion eye area and skin percentage. Moreover, the correlations between genetic distance and ratio of feedstuff to meat, and between genetic distance and lion eye area were significant (p<0.05). In conclusion, correlation between genetic distance and heterosis percentage varied with different traits.

Key words: RAPD marker, genetic distance, heterosis percentage, pig