DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 1-2/1966 str. 34 <-- 34 --> PDF |
simultaneously. Selection is further complicated by negative genetic correlations between two or more characteristics. Hence, a system of points for the volume production of a plus tree at constant stand density, and for branching habit (with the possible exception of branch angle) is applied only as a guide, in order to determine (for each tree species and character, and within each REGRESSION LINE BASIC DENSITY ON ANNUAL RING WIDTH OSOOi Basic density Q/cm3 O^oa 112 Yo OL.00 0 i65 = 100 % 0 300 U mm Annual nnQ width Plus tree suQQcsted n ChccU trees from the same stand Fig. 6. provenance region) a level of rejection i.e. for the probable inferior half of the proposed plus trees (see publications on the method of independent culling levels, such as those by Smith, 1936, Hazel and Lush, 1942, Hazel, 1943, Rasmuson, 1964, and Stern and Hattemer, 1964). Probably a more reliable evaluation of each complex character, and primarily of the |