文献类型：期刊文献

英文题名：COMPREHENSIVE SELECTION AND VARIATION ANALYSIS OF GROWTH TRAITS AND WOOD COLOR OF CASTANOPSIS HYSTRIX HALF-SIB FAMILIES

作者：Liu, Guangjin[1,2] Jia, Hongyan[1] Shen, Wenhui[3] Xu, Jianmin[2]

通信作者：Xu, JM[1]

机构：[1]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 532600, Guangxi, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[3]Guangxi Forestry Res Inst, Nanning 530002, Guangxi, Peoples R China

年份：2023

卷号：55

期号：3

起止页码：1135-1144

外文期刊名：PAKISTAN JOURNAL OF BOTANY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000953997300034)】；

基金：Acknowledgments This work was supported by the Experimental Center of Tropical Forestry Science Foundation (Grant No.: RL-2020-01) and Guangxi Natural Science Foundation (Grant No.: 2018GXNSFBA294013) . We would also like to thank Research Associate Jie Zeng, who provided guidance on the research plan and edited our manuscript, and Doctor Chunsheng Wang, who provided guidance on data processing.

语种：英文

外文关键词：Castanopsis hystrix; Growth trait; Wood color; Genetic variation; Comprehensive selection

摘要：Castanopsis hystrix is an economically valuable tropical/subtropical timber species naturally distributed in various Asian regions. Studies on genetic variations affecting C. hystrix growth and wood color traits can increase the wood value. Trees in a 17 -year -old forest of 32 C. hystrix half -sib families were analyzed to determine genetic variations in growth traits. Genetic variations affecting wood color (L* (lightness), chromaticity coordinate a*, and chromaticity coordinate b* were evaluated in tree cores. Annual growth rates of diameter at breast height, tree height, and stem volume were 1.27 cm, 1.08 m, and 0.02 m3, respectively, indicating high growth. The L*, a*, and b* values of C. hystrix heartwood were 47.55 +/- 5.02, 15.50 +/- 1.86, and 19.26 +/- 2.35, respectively. Block was the decisive factor affecting variations in L* of heartwood and family main affected heartwood a* differentiation. Block x family interactions significantly affected stem volume, heartwood a*, and heartwood b* but to a lesser extent than the individual effects of family and environment. The family heritability of diameter at breast height, tree height, volume, heartwood a*, and heartwood b* were 0.53, 0.56, 0.76, 0.85, 0.68, respectively. The individual heritability of corresponding characters were 0.10?0.14?0.11?0.11?and 0.04. The wood color of heartwood and sapwood had no genetic correlation with growth characters, which indicated that the wood color of heartwood and sapwood was independent of growth traits. Six half -sib families with excellent growth and heartwood color were selected by using a multi -trait comprehensive evaluation method. The mean genetic gain of diameter at breast height, tree height, volume, heartwood a*, and heartwood b* were 12.093%, 7.166%, 39.054%, 10.265% and 7.235%. These results provide a theoretical basis for the evaluation and selection of families with superior growth and wood color traits for genetic improvement and directed breeding of C. hystrix.