STUDIES ON THE SELECTION AND BREEDING OF FINE STRAINS IN WALNUT IN HENAN PROVINCE

This paper expounds the standards, methods and ptocedures of the selection and breeding among fine strains in walnut. The main economical characteristics of 3 fine strains selected (A 85, Yulin land Songxian 1) are ideal according to the selective standards. The average rate of kernels is 54%. The oil content in kernels is above 72%. Their yields are 1.3—1.7 times higher than the comparison strains. These fine strains have now been popularized and applied to production.