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김만조 ( Gim Man Jo ),이욱 ( Lee Ug ),황명수 ( Hwang Myeong Su ),김선창 ( Kim Seon Chang ),이문호 ( Lee Mun Ho ) 한국산림과학회 2003 한국산림과학회지 Vol.92 No.4
This study was conducted to provide basic data for chestnut breeding program and the morphological identification system of chestnut cultivars using Korean prevailing chestnut cultivars. European and Chinese chestnut cultivars. There were significant differences among cultivars in blooming time. Cultivars derived from Chinese chestnut showed later blooming patterns than Japanese chestnut cultivars. In most of cultivars, the full blooming period of pistillate flower considered to be optimum for pollination was about 4 days. In the fructification rate, `Tsukuba` showed highest(82.1%), while `Tono 2` was lowest(34.5%). In the optimum harvesting time, the early-maturing cultivar `Moriwase` was earliest at 1 September, while the late-maturing cultivar `Banseki` latest at 13 October. The harvesting period showed significant differences among cultivars, and `Tanzawa`, `Otanba` and `Hamjongyul` were shortest(8 days), while‘Riheiguri` and `Tsukuba` were longest(〉2 weeks). Soluble solids content of nut measured immediately after harvest varied between 9.6% in `Isseumo` to 22.2% in `Hamjongyul`. Nearly cultivars derived from Chinese chestnut showed higher values than Japanese chestnut cultivars in soluble solids content, and nut hardness was similar to soluble solids content. With respect to percentage of polyembryonic nuts, most of cultivars were below 5%, but `Tono 2` was highest(11.2%) resulted in depreciating market values. Percentage with the pericarp split was below 5% in most of cultivars, but `Daab` was highest(32.4%) inferior to other cultivars The UPGMA dendrogram based on nut characteristics was devided into three groups in genetic distance 1.0, and `Hamjongyul`, `Pyungyangyul` and `Cheonjinyul` were distinguished from other cultivars