The correlation between plant hormones during the harvest of main crop and their ratooning ability in hybrid mid-rice;

Relation between agronomic traits during the harvest of main crop and their ratooning ability in hybrid mid-rice;

A field experiment is conducted to examine the correlativity of the content of some nutrients in the main rice of 30 rice varieties (hybrid crosses) and their ratooning ability.

The regeneration capacity of cotyledons of autotetraploid and diploid non-heading Chinese cabbage and its relation to the endogenous hormones;

Some culture methods were compared to evaluate their effects on enhancing plant regeneration ability of rice callus with three photoperiod- and thermo-sensitive genic male sterile rice lines as the materials.

Because the regeneration ability was mainly affected by its hereditary and culture conditions,it is important to know the culture conditions for corn tissue culture.

By means of investigation and analysis on the library in economically underdeveloped areas,to find out the internal and external causes of restricting the library s development,scientific analysis adaptable to local conditions will be taken,to figure out the solution to the problems,to fully discuss on the development of regenerative capacity of library in the specific areas.