文献类型：期刊文献

英文题名：GENETIC PARAMETERS IN FIBRE TRAITS FROM A FULL DIALLEL OF EUCALYPTUS UROPHYLLA IN SOUTHERN CHINA

作者：Wu, S. J.[1] Xu, J. M.[1] Lu, Z. H.[1] Guo, W. Z.[1] Zhou, L.[1] Li, G. Y.[1]

第一作者：吴世军

通信作者：Lu, ZH[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China

年份：2019

卷号：31

期号：3

起止页码：343-352

外文期刊名：JOURNAL OF TROPICAL FOREST SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000480515000009)】；

基金：The authors gratefully thank Harding K and Pegg R for their help in improving the manuscript and Yang H from Xinhui Research Institute of Forestry Science for sample preparation. This study was funded by two projects: Genetic Basic of Male Parent Selection on Heterosis of F1 Family in Eucalyptus urophylla (31600545) and Overseas Study Support Plan of International Cooperation (CAFYBB2019GC001-5).

语种：英文

外文关键词：Heterosis; breeding strategy; fibre length; fibre width; kink index

摘要：Fibre traits were assessed for 6 x 6 full-diallel families of Eucalyptus urophylla measured at 10 years old. Analysis of variance showed that there were significant combination effects and no block differences on any fibre traits except fibre width. The mean fibre length, fibre width, fine percent, mean curl, fibre kink index and kink angle of controlled crossed families were 0.57 mm, 19.74 mu m, 27.38%, 0.039 degrees, 0.64 and 8.24 degrees respectively. The heritability of fibre traits was at low to middle level, and the coefficients of variation ranged from 8.58 (width) to 39.30% (kink angel). Inbreeding depressions of fibre length and width were observed in most families, and the largest inbreeding depressions were estimated at -61.76 and -15.45%. Heterosis ranged from -42.42 to 103.84%. Kink angle had higher general combining ability and fine percent had higher estimation of specific combining ability. Genotypic correlation between fibre length and fibre width were positive, implying these two traits could be selected simultaneously. As an important indicator of pulp yield, fibre traits should be used for breeding E. urophylla.