땅콩 低溫發芽力의 品種間 差異

Study on the Low Temperature Germinability in Peanut Varieties

The seed vigor of 178 peanut varieties were tested at low temperature regimes of 10℃, 12℃, and 14℃, to search the gene sources for improving the seed vigor of peanuts in low temperature seeding. The germination percentage, geimination rate, average days to germination, and germination coefficient were compared between botanical types, seed sizes, and origins. Means of germination percentage was 18.6% at 12℃ and 39.7% at 14℃, while at l4℃ germinated not at all. 32 varieties showed no germination, and two varieties germinated over 80% at 12℃, and 17 varieties showed over 80% of germination at 14℃. Botanical type of ssp. fastigiata had higher seed vigor than ssp. hypogaea, and the difference of percent germination between the two types were greater in smaller-seeded varieties. Seed size was found to be negatively correlated with germination percentage, germination rate, and germination coefficient at 12℃ and 14℃. The varieties originated from Taiwan and Philippines showed the highest seed vigor while varieties of Korea were the lowest in low temperature germination. However New Mexico Valencia, Valencia type and PI 119810, Spanish type germinated 95% and l00% at 12℃ and 100% at 14℃, were selected as high germinability cultivar in low temperature.