Inheritance of growth and survival in two 9-year-old,open-pollinated progenies of an advanced breeding population of Chinese firs in southeastern China |
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| Authors: | Renhua Zheng Shunde Su Hui Xiao Harry X Wu |
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| Institution: | 1.Fujian Academy of Forestry,Fuzhou,People’s Republic of China;2.The Key Laboratory of Timber Forest Breeding and Cultivation for Mountainous Areas in Southern China,Fuzhou,People’s Republic of China;3.State Forestry Administration Engineering Research Center of Chinese Fir,Fuzhou,People’s Republic of China;4.The Key Laboratory of Forest Culture and Forest Product Processing Utilization of Fujian Province,Fuzhou,People’s Republic of China;5.Research Institute of Tropical Forestry,Chinese Academy of Forestry,Guangzhou,People’s Republic of China;6.The Key Laboratory of Forest Genetics and Biotechnology,Nanjing Forestry University,Nanjing,People’s Republic of China;7.Department of Forest Genetics and Plant Physiology, Ume? Plant Science Centre,Swedish University of Agricultural Sciences,Ume?,Sweden;8.CSIRO NRCA,Canberra,Australia |
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| Abstract: | Tree growth traits (tree height, DBH and stem volume) and survival from two 9-year-old, open-pollinated progeny tests of Chinese fir were investigated for heritability, genotype × environment interaction, age-age genetic correlation and selection efficiency. The 97 and 79 families planted at two sites were collected from the third-cycle seed orchard. Individual heritability was estimated between 0.05 and 0.21 for tree height, DBH, and volume and between 0.45 and 1.0 for survival. Family heritability was between 0.20 and 1.14. Significant genotype × environment interaction was observed for the three growth traits. Type B genetic correlation was between 0.41 and 0.67 with an increasing trend as tree grows. High age-age genetic correlation was observed with correlation reaching 0.9 after age 4 for height, DBH, and volume. The genetic gains were estimated at 3.26, 3.39 and 5.98 % for tree height, DBH, and volume with 10 % selection intensity. The implication for advanced tree breeding in Chinese fir is discussed. |
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