林业科学2011，Vol.47Issue(5)：31-39,9.
杂种落叶松F2代自由授粉家系纸浆材遗传变异及多性状联合选择
Genetic Variations in Pulpwood Qualities of F2 Generation of Open-Pollinated Larch Hybrid Families and Multi-Traits Selection
摘要
Abstract
This study measured genetic variation in growth and wood traits in seven 17-year-old open-pollinated larch hybrid families and three control progeny testing forests and conducted the correlation analysis, comprehensive evaluation and selection. The results showed that there were variations within the families as well as between families. Latewood had greater coefficient of variation than earlywood. There were abundant variations in the volume, tracheid length-width ratio,resin canal proportion and the coefficients of variation were between 26. 2％ - 85.3％. There was small variation in the Holo cellulose (HC), early wood microfibrillar angle (MFA) and tracheid proportion and the coefficients of variation were between 1.4％ -8. 1％. There were significant differences in HC, early wood and latewood MFA, tracheid length-width ratio, latewood radial diameter, latewood cell wall ratio, latewood tracheid wall thickness-diameter ratio and tracheid proportion between treatments. There were differences in volume, tracheid length, tangential diameter, early wood and latewood number of cells per square millimeter between treatments. The family heritability were between 59.3％ -92.7％, suggesting that these traits had potential for pulpwood selection. There was significantly positive correlation between volume and HC, and there were positive correlations between volume and MFA, tangential diameter, late wood tracheid wall thickness-diameter ratio and tracheid proportion, while there was negative correlation between tracheid length-width ratio and late wood number of cells per square millimeter. Correlations were negatively high between basic density and volume, significantly negatively high between basic density and HC, positively high between basic density and tracheid length-width ratio, early wood MFA, latewood number of cells per square millimeter, negatively high between HC and late wood number of cells per square millimeter, significantly negatively high between tracheid length-width ratio and late wood cell wall ratio, and significantly positively high between early wood MFA and tracheid proportion. Ⅰ3, Ⅰ4, and Ⅰ9 were the idealist index. Based on growth and wood traits, 3 families were selected for pulpwood production: Xing'an 7 ×Japan 77-2(Larix gmelinii 7 × L. kaempferi 77-2 ), Japan 5 × Chang 77-3 (Larix kaempferi 5 × L. olgensis 77-3 ) and Japan3 × Xing'an 9 ( Larix kaempferi 3 × L. gmelinii 9 ). The family trait genetic gain was: volume ( 34. 7％ ), late wood cell wall ratio ( 11.0％ ), HC (7. 5％ ), tracheid wall thickness-diameter ratio (6. 2％ ), tracheid length-width ratio (4. 5％ ), latewood MFA (3.2％), latewood number of cells per square millimeter (0. 3％ ).关键词
杂种落叶松/自由授粉家系/纸浆材/材性/遗传变异/家系选择Key words
hybrid larch(Larix)/ open-pollination/ pulpwood/wood traits/ genetic variations/ family selection分类
农业科技引用本文复制引用
邓继峰,张含国,张磊,朱航勇,贯春雨..杂种落叶松F2代自由授粉家系纸浆材遗传变异及多性状联合选择[J].林业科学,2011,47(5):31-39,9.基金项目
主要用材树种优良家系、无性系选育技术的研究(GA08B201-01) （GA08B201-01）
东北林业大学研究生论文资助项目(gram9) （gram9）
杂种落叶松优良家系选育与区域化试验(2006-37). （2006-37）
