شناسايي و ارزيابي درختان برتر گردو JUGLANS REGIA L. در استان فارس

Identification and evaluation of Persian walnut elite trees in Fars province

This study was carried out to identify elite trees of Persian walnut (Juglans regia L) in Fars province. The Persian walnut populations were evaluated during 1993 and 1994 and 101 elite trees selected in different areas. We found that considerable generic variability existed within the populations of Persian walnut grown from seeds. The most important characteristics of trees which were evaluated were the date of leaf but break, lateral bud flowering, vigor, tree shape and nut qualities: including the morphology of nut, the average weight of nut, the average weight of shell, the average of kernel percentage, kernel quality and the average length and diameter of nut. Some elite trees with high quality of nuts were identified that could be recommended for mass propagation. Correlation analysis showed that a positive and significant correlation was existed among the average weight of nut and the average length and diameter of nut, the average weight of shell and the average weight of kernel. Average kernel percentage showed a negative and singificant correlation with the average weight of shell and the average weight of nut, but its correlation with the average weight of kernel was positive and significant.