Improvement of maize inbred line yield by using backcross method
2009
Ngo Thi Minh Tam; Bui Manh Cuong; Phung Quoc Tuan
The imbred line plays an important role in heterosis breeding of maize. The inbred-hybrid breeding method requires a continiuous supply of new inbred lines that have good combining ability for yield and must have good seed yield. Using backcross method in increasing yield of parental lines based on selection of traits as ear length, kernel-row number and percentage of two effective ear plants is realizable. By the use of this, the early maturing lines with general combining ability and variance of specific combining ability better than the paretal line can be abtained. The data of the experiments also showed that when the line yield was increased, the heterosis was reduced. However, this is not effect to yield of separate crosses.
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