Abstract:

Abstract: According to observation and study on filbests of agamic generation of Corylus heterophylla×C. avellana in a testing plot of cold-resistance hazelnut for 7 years (2000—2006), the results are reported for the first time at home and abroad in the crossbreeding field of hazelnut as follows: 1)The flower of catkin of the agamic generations of C.heterophylla×C. avellana was generally 2～3 years earlier in comparison with blossoming female and bearing fruit;2) There was a significantly or extreme significantly positive correlation between nut size and column size of the catkin, while there was significantly negative correlation between thickness of nut shell and ratio (T) of the length(L) to central section horizontal diameter (R) of catkin column; 3) The nut size and the shell thickness were able to be predicted in advance of 2～3 years before bearing the hazelnut, therefore those plants with small catkin column could be eliminated in order to shorten the crossbreeding time.

Key words: Key words: Corylus heterophylla×, Corylus avellana, catkin column, correlation, regession