DIGITALNA ARHIVA ŠUMARSKOG LISTA

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ŠUMARSKI LIST 5-6/2013 str. 31 <-- 31 --> PDF |

orchards of each species except for that of P. halepensis, Pearson’s correlation coefficient between N and N_{c} was high and significant. Pearson’s correlation coefficients varied from 0.798 (p < 0.0099) (Picea orientalis seed orchards) to 0.996 (p< 0.0001) (P. sylvestris seed orchards) among the species (Figure 1). Pearson’s correlation coefficients between age and N_{c} (varied from –0.38 to –0.93) showed that there was negative correlation, which means that the older the orchard was, the smaller the effective number of clones. The average r value between age and N_{c} was calculated as –0.47 (p< 0.00001).Distribution of N _{r} in 169 clonal seed orchards of conifers in Turkey was shown in Figure 2. The N_{r }among seed orchards within species and among species was different. When all the seed orchards are considered, the mean N_{r} value was calculated as 0.827 (Table 1). For all the seed orchards analyzed, 5 orchards had N_{r} value less than 0.5, and 157 seed orchards had N_{r} value higher than 0.6 (Figure 2). |