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강규석,우영곤,이경미 한국육종학회 2023 한국육종학회지 Vol.55 No.3
This study aimed to delineate the seed transfer zone of Pinus densiflora. After generating transfer functions based on growthcharacteristic data from 10 pine test sites for 36 seed sources and six bioclimatic variables, the critical seed transfer distance for each climatevariable was calculated. Based on our results, seed transfer zones were delineated by overlaying maps for all climate variables. In the pineprovenance test, seeds from eastern Korea generally showed superior growth at each test site. Temperature-related variables accounted fora higher proportion of the selected bioclimatic variables than precipitation-related variables. Additionally, warm-to-cold seed transfer in easternKorea and cold-to-warm seed transfer in central and southern Korea were overestimated, widening the seed-transfer zone. Examining the long-termgrowth of the trees, introducing additional variables, and applying a model with a higher level of rationality to the transfer function are necessaryfor delineating the optimal seed-transfer zone.
낙엽송 클론 채종원에서 구과 채취시기에 따른 구과특성 및 종자품질
김예지,구다은,조계홍,최희윤,우영곤,이채빈,유성열,주혜준,강규석 한국산림과학회 2023 한국산림과학회지 Vol.112 No.3
Harvest time is one of the most important determining factors of seed quality, especially for species that produce seeds over irregular and long-term periods, such as Larix kaempferi. A cone collection plan must be established to increase seed production efficiency and stable mass production. We investigated seed qualitiessuch as seed efficiency, germination rate, and T50 (germination speed), with 7 or 8 cone collection times at a clonal seed orchard of L. kaempferi in Chungju between 2021 and 2022. A multivariate analysiswas then performed for the collected data. In early August, decreasesin the moisture contents and browning of cones were observed. These were followed by a decrease in germination rate, with a peak at the end of September, but no clear trend was observed. The later the cones were harvested, the better the seed vigor (T50). However, the seed yield and efficiency decreased owing to increases in seed scattering and the number of insect-damaged seeds. As a result, the optimal time of seed harvest for the seed orchard was in early August. To produce uniform seedlings, insect damage must be reduced through timely control and harvest cones in early September. This shows that the degree of browning and moisture content of cones can be used as indicators of the timing of cone collection in L. kaempferi seed orchards.