柑橘類 貯藏花粉의 壽命 比較

Comparison of longevity of stored pollen among Citrus junos Sieb. ex Tanaka, Poncirus trifoliata(L.) Raf., and their hybrids

This study was investigated to find longevity and fertilizing ability of stored pollens in the Aurantioideae through germination test and artificial crossing. The germination rate of pollen stored for 8 months was 88.3% in Citrus junos, 71.7% in Citrus junos var. Hwanggeumyuza(HG) and 52.0% in Poncirus trifoliata and that of pollen stored for 24 months was 87.7% in C. junos, 12.7% in HG, and 0% in P. trifoliata orange and that of pollen stored for 48 months was 35.0% in C. junos only. Fruit set ratio by pollens stored for 24 months was 50.8% in HG×C. junos, 5.0% in HG×HG and 0% in HG×P. trifoliata, and that by pollens stored for 48 months was 49.3% in HG×C. junos and 0% in HG×HG. The germination rate of seeds set by stored pollens collected that year was 81.7 % in HG×C. junos, 59.7% in HG×HG and 38.9% in HG×P. trifoliata, and those of seeds set by pollens stored for 24 months or 48 months were 63.8% and 66.7%, respectively in HG×C. junos. The phenotype of hybrids of HG×C. junos was mostly intermediate type of their parents.