Four parents of Chadianhong(♀)×MY9094(♂),Lunkang 7 (♀)×Shannong215953 (♀) and their F2 were cultivated at a growth chamber for root experiment to explore the heritability of the seedling traits from 2-leaves to 6-leaves and the relation between seedling morphological traits and drought resistance. Significant positive correlation coefficient was found between drought resistance and root dry weight. Analysis indicated that heritabilities for root number, root length and plant height increase withgrowth of se...