摘要
以沙坝国家云杉／落叶松良种基地苗圃的云杉属7个种（2007年移栽的欧洲云杉、西加云杉、红皮云杉、黑云杉、蓝云杉、白云杉和恩氏云杉）实生苗1a针叶为对象，研究种间和种内针叶性状的遗传差异，为云杉苗期识别和进行适应性评价提供依据。结果表明：（1）云杉种间针叶长、宽、长／宽、鲜重、干重、冬季含水率差异达显著水平，且云杉针叶性状种间和种内都存在着丰富的遗传变异。（2）7个云杉种间针叶性状的变异系数从大到小依次为鲜重（47．65％）〉干重（40．94％）〉宽（24．98％）〉长（22．39％）〉长／宽（21．32％）〉冬季含水率（12．75％），鲜重的变异系数最大，冬季含水率是最稳定的性状。（3）种内白云杉的鲜重、干重的变异系数最大，分别为50．85％和38．01％，蓝云杉针叶冬季含水率变异系数最小，为2．11％。（4）针叶性状间除长／宽与鲜重、干重、冬季含水率不相关外，其余性状间呈极显著相关关系；除针叶长／宽与苗高、当年高生长量不相关外，其余针叶性状与树高、当年高生长量呈显著或极显著正相关关系。（5）种间针叶干重与针叶长、宽回归方程的决定系数在0．793～0．993间，根据针叶长指标将7个云杉种划分为3类，并可根据云杉针叶长、宽、长／宽、鲜重、干重、颜色和气孔带等性状进行苗期识别和选择。
In order to build foundation for spruce identification in seedling stage and evaluation of adaptability,one year old seedlings from seven species of Picea were selected to study the interspecific and intraspecific genetic variation of basic needle morphological characters. The results showed that： （1）Needle length, needle width, needle length/width, fresh weight, dry weight and moisture content in winter differed significantly among species. There were abundant genetic variations within and among the seven species. （2）The coefficient of variation of needle characters as follows： the fresh weight （47.65 %）〉dry weight （40.94%） 〉needle width （24.98%）〉needle length （22.39 %） 〉needle width/length （21.32%） 〉moisture content in winter （12.75%）,the coefficient of variation of fresh weight was the largest,and the moisture content in winter was the most stable character. （3）To white spruce, the intraspecific variation coefficient of fresh weight and dry weight was the largest, was 50.85 % and 38.01%,respectively. The coefficient variation of needle moisture content in winter of blue spruce was the smallest （2.11%）. （4）There were very significant correlations among the six indices mentioned above except for needle length/width with fresh weight, dry weight and moisture content in winter. The relationship of each needle character and height, seedling height growth were significant or very significant excepting needle length/width. （5）The determination coefficients of needle dry weight and needle length, needle width were between 0. 793 -0. 993. Seven species could be divided into three categories according to the needle length, and their seedlings could he identified and selected according to needle length,width and length/width, fresh weight, color and stomatal band.
出处
《西北植物学报》
CAS
CSCD
北大核心
2013年第12期2529-2536,共8页
Acta Botanica Boreali-Occidentalia Sinica
基金
"十二五"国家科技支撑计划课题(2012BAD01B01)
关键词
云杉属
种间
种内
针叶性状
Picea
interspecific
intraspecific
needle trait
