Studies on genetic tendency of internode length in reciprocal cross generation between Jingbai and Yali pear

Jingbai,Yali pear and their 400 reciprocal cross seedlings were used to study the genetic tendency of internode length of branch.Results showed that internode length was the character controlled by multigene and tended to be longer obviously.Normal distribution was observed on internode length in filial generation,and the average transmitting ability was 115.70%,in which the additive effect played the leading role.Significant heterosis in filial generation was reflected by their higher value of internode length than that of parents,with the average rate as 91.75%.There was a signficant positive correlation between the internode length of reciprocal cross seedlings(r=0.988**,P0.01).