TAILIEUCHUNG - Báo cáo lâm nghiệp: "Initial evaluation of half-sib progenies of Norway spruce using the best line"

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Initial evaluation of half-sib progenies of Norway spruce using the best line. | JOURNAL OF FOREST SCIENCE 53 2007 2 41-46 Initial evaluation of half-sib progenies of Norway spruce using the best linear unbiased prediction J. Klápốtễ M. Lstiburek J. Kobliha Faculty of Forestry and Environment Czech University of Life Sciences in Prague Prague Czech Republic ABSTRACT The present paper deals with data obtained from fifteen years old Norway spruce Picea abies L. Karst. progeny test established at three sites in the Sázava River region. Parameter under the evaluation was a tree height in 15 years following the establishment of the trial. Genetic parameters were estimated using the REML Restricted Maximum Likelihood procedure followed by the BLUP Best Linear Unbiased Prediction . Genetic parameters estimates were used to predict genetic gain in three alternative selection strategies. The value of gain depends on target value of gene diversity. 10-15 gain is due to selecting breeding population composed of 50 individuals. Based on these quantitative findings current and future research orientation is discussed. Keywords Norway spruce BLUP analysis progeny test genetic gain Norway spruce is recognized for high productivity relatively fast growth and superior wood quality. It is economically the most important forest tree species in the Czech Republic. These superior characteristics gave rise to the massive expansion out of its natural range. Some omission of biological requirements of this species in the past led consequently to more expensive aforestation costs due to lower resistance to biotic and abiotic factors Beznoska 2004 . Norway spruce from Sázava River region is characterized as an ecotype well adapted to low elevated areas 300 to 500 m . and atmospheric precipitation of 500 to 700 mm. Considering high productivity and some quality traits genetic research was initiated in the 60 s with the phenotypic selection of about 200 plus trees Zdarska Machek 1978 . Understanding the genetics of Norway spruce is a key to more efficient management

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