초록
This study was carried out to develop new cultivars of Z. serrata showing red fall leaf as street trees. Z. serrata which had red fall leaves were selected and then examined for contents of leaf anthocyanin and chlorophyll. In addition, for the progeny test, selected trees were grafted. Of 21 trees having red autumn leaves, three individuals, 'S-6', 'S-20', and 'I-24' were finally selected. They contained higher level of anthocyanin in the leaves. Once developed, the red color remained till late autumn. Grafted plants of the selected strains showed high grafting efficiency and red foliage color in autumn. The soil pH of the survey sites ranged from 5.9 to 7.24. However, other soil characteristics did not show much difference among the sites with regard to inorganic nutrients including N(%), $P_2O_5$, CEC(mg/meq), $K^+$, $Ca^{3+}$, and $Mg^{2+}$, 'S-6', 'S-20', and 'I-24', clonal lines with red fall leaf were selected as new cultivars and propagates by grafting.
