Characteristics of Flower of Plus Tree Clones of Pinus koraiensis S. et Z.

잣나무 수형목(秀型木) clone의 개화특성(開花特性)

The 167 plus tree clones of Pinus koraiensis in clone bank planted in 1983 were investigated for time of flowering, rate of flowering, and number of flowering from 1986 to 1989. The results were as follows : 1) There were clones in the minority which do not cross in natural pollination between earlest flowering female clones and latest shedding male clones. 2) The rate of male flowering appeared less than rate of female flowering and received influence of genetic more than rate of female flowering. 3) The numbers of flowering in female and male flower were affected by small number of clones. 4) The flowering number for female strobili was not related to the flowering number of male flower. The 42 clones among 167 clone had not male flower. 5) The flowering number of 167clones were classified three groups in female flower and four groups in male flower by L.S.D 5% test. 6) The clones with abundant female and male flower were selected based on the component analysis. 7) As Based on flowering rate and number of female, the juvenile phase of plus tree clones appeared to be until four years after grafting ; the transition period appeared to be from five to seven years after grafting ; the adult phase appeared to begin from eight years after grafting, 8) The grafted trees of Pinus koraiensis appeared early flowerring about six years compared with seedling trees.

1983년도(年度) 보고(報告)된 잣나무 수형목(秀型木) 167 clone의 clone 보존원(保存園)에서 1986년(年)부터 1989년(年)까지, 개화시기(開花時期), 개화율(開花率), 개화량(開花量)을 조사(調査)한 결과(結果)를 요약(要約)하면 다음과 같다. 1) 자화(雌花)가 조기개화(早期開花)하는 소수 clone과 웅화(雄花)가 늦게 비산(飛散)하는 소수 clone들 사이에는 자연교배(自然交配) 될 수 없는 clone들도 있었다. 2) 웅화(雄花)의 개화율(開花率)은 낮았으며 자화(雌花)의 개화율(開花率)보다 유전적(遺傳的)인 영향을 많이 받고 있었다. 3) 자화(雌花)와 웅화(雄花)의 대화량(開花量)은 소수 clone에 의하여 영향을 받고 있었다. 4) 자화(雌花)와 웅화(雄花)의 개화량(開花量)은 상호(相互) 상관(相觀)이 없었으며 167 clone중 42 clone은 웅화(雄花)가 개화(開花)하지 않았다. 5) 167 clone의 개화량(開花量)은 L.S.D 5% 검정(檢定)에 의하여 자화(雌花)는 3 group, 웅화(雄花)는 4 group으로 분류(分類)되었다. 6) 주성분(主成分) 분석(分析)에 의하여 자화(雌花)와 웅화(雄花)가 다량개화(多量開花)하는 clone을 선발(選拔)할수 있었다. 7) 자화(雌花)의 개화율(開花率)과 개화량(開花量)을 기준으로 할 때 Juvenile phase 기간(期間)은 접목(接木)후 4년(年)까지 였으며 transition 기간(期間)은 접목(接木)후 5년(年)부터 7년(年)까지 adalt phase 기간(期間)은 접목(接木)후 8년(年)부터였다. 8) 잣나무 접목묘(接木苗)는 실생묘(實生苗) 보다 6년이상(年以上) 빠르게 개화(開花)하였다.