摘要
以1年生50个毛白杨种内杂交无性系(49个全同胞子代无性系和1个亲本)为材料,对其苗高、地径和10个叶片性状(叶片长度、叶片宽度、叶柄长度等)进行调查分析,结果表明:无性系间所有性状均存在极显著差异(P<0.01),50个无性系苗高平均值为64.47 cm,地径平均值为7.53 mm,叶片长度、叶片宽度和单叶面积平均值分别为9.43 cm、8.78 cm和60.05 cm2;各性状表型变异系数变化范围为2.88%(叶基角)-100.36%(单叶面积),遗传变异系数与表型变异系数接近,重复力变化范围为0.851(地径)-0.973(叶尖角),高变异、高重复力有利于优良无性系的选择;相关分析结果表明叶片长度、叶片宽度、单叶面积与苗高和地径间均达极显著正相关水平(P<0.01);从回归分析来看,叶片宽度、叶片长度和叶片锯齿数量是影响苗高、地径的重要因子;利用综合评价法,以10%入选率对无性系进行选择,无性系Ph111、Ph153、Ph90、Ph14和Ph12入选,入选无性系苗高和地径遗传增益分别为32.20%和13.01%。
50 intraspecific hybridization Populus tomentosa clones including 49 offspring clones and one male parent clone in one year-old as materials, tree height （H）, basal diameter （BD） and 10 leaf traits （leaf length （LL）, leaf width（ LW）, leaf petiole（LP） et al. ） were investigated. There were exist highly significant difference （P 〈0. 01） for all the traits among different clone. The average of H, BD, LL, LF and leaf area （LA） were 64. 47 cm, 7.53 mm, 9.43 cm, 8.78 cm and 60. 05 cm2, respectively. Coefficients of phenotypic variation （PCV） of all the traits ranged from 2.88% （leaf basal angle, LBA） to 100.36% （leaf sharp angle, LSA）, coefficients of genetic variation（GCV） were close to PCV and repeatabilities（R） ranged from 0. 851 to 0. 973. High PCV and R were beneficial for excellent clone selected. There was significant positive correlation among LL, LW, LA, H and BD（P 〈 0.01 ）. Regression analysis results showed that LW, LL and leaf sawtooth number （LSN） were the most important factors for influencing H and BD growth. By the comprehensive evaluation, with a selection rate of 10%, Genetic gains from these five Ph 111, Ph 153, Ph 90, Phl4 and Ph 12 were selected as the excellent clones clones were 32.20% for tree height and 13.01% for basal diameter, respectively
出处
《植物研究》
CAS
CSCD
北大核心
2016年第1期62-67,共6页
Bulletin of Botanical Research
基金
中央高校基本科研业务费专项资金项目(DL13BA09)
中国博士后科学基金项目(2014M56315)
关键词
毛白杨
生长量
叶片性状
变异系数
重复力
Populus tomentosa
growth
leaf traits
coefficients of variation
repeatability
