Performance and genetic diversity of 23 provenances of northern red oak ( Quercus rubra L.) after 25

• 作 者: Ki-Won Kim Kyoung-Mi Lee Soon-Ho Kwon Ji-Min Park Yang-Gil Kim Hye-In Kang Da-Bin Yum Kyu-Suk Kang
• 机 构: Department of Agriculture,Forestry and Bioresources,Seoul National University,Seoul 08826,Republic o
• 出 处: 林业研究（英文版）
• 发表日期: 2021年5期
• 关键词: Introduction breeding Provenance test Adaptation Microsatellite marker Genetic d

Growth traits and genetic diversity of 23 prov-enances of Quercus rubra introduced from North America were analyzed in a provenance trial established with a rand-omized block design in Hwaseong, Gyeonggi, South Korea in 1993. Growth variables and survival at age 25 were com-pared with results from early stages. Height, DBH, volume and stem straightness of Q. rubra was better than those of the domestic oak ( Quercus accutissima ). Growth of the Dunham Island provenance from New York was the best among the 23 provenances that of the Eagle River prov-enance from Wisconsin was poorest. Survival rate at age 25 was on average 52％. The longitude of seed origin and growth of provenance were consistently significantly nega-tively correlated at all ages. Growth of coastal provenances was superior to that of the inland provenances, which were separated by the Appalachian Mountains. Genetic diversity and genetic distance among the provenances were evaluated using microsatellite markers. The allelic frequencies showed high polymorphism in 10 microsatellite loci, and 292 alleles were found. Of 10 loci, two were commonly found in the 23 provenances. The mean allelic diversity and heterozygosity observed among the provenances were similar to those from the native populations of Q. rubra in North America. Nei′s genetic distance among the 23 was estimated and showed that a clear trend between geographic and genetic distances, indicating that some provenances have high genetic diversity with superior growth performance.