낙엽송 클론의 암꽃 개화량 변이

Clonal Variation in Female Flowering of Larix leptolepis

The clonal variation in female flowering was studied in Larix leptolepisclone bank, consisting of 116 clones,for three years. The between-year variation was large; i.e. the percentage of flowering grafts and average number offlowering per graft were 28.4∼67.2 and 9∼176, respectively. Differences in flowering abundance among clones werelarge and statistically significant in all the years studied. The variance of flowering abundance among clones wasincreased when flowering was poor. The average of broad-sense heritability of flowering abundance was 0.52. Thegenetic gain (%G) was estimated at 57.4% when the upper 30% clones were selected. The clonal stability of floweringabundance was compared using average number of flowering and coefficient of variance value of each clone. The clonessuch as Gyeonggi 9 (29), Kangwon 37 (137), Chungnam 6 (46), Chungnam 14 (414), R11, R8 showed abundantflowering and high stability.