Differentially expressed genes between chicken hybrids and their parents and relationship with heterosis

mRNA differential display was used to analyze the difference of gene expression between cross combinations,EC and CE,and their parental inbreds,White Leghorn(EE)and Silkies(CC)of eight weeks bld.Three genes specified expressed in hybrids and one gene over-expressed in hybrid were found.By cloning,sequencing and BLAST analysis,one specific expression eDNA band was cytosolic isocitrate dehydrogenase gene,the other two were new genes which function were unknown,and the over-expressed eDNA band was proteosome subunit p112 gene.The results implied that functional genes and regulatory genes which specified expressed or over-expressed in chiken hybrids were related to heterosis of some carcass traits.