摘要
为探究水松种子形态性状对发芽特性的影响程度,以福建省古田县6个水松家系种子为研究对象,运用相关分析、通径分析等方法对水松种子长度、宽度、投影面积、RGB色彩系统的R值、G值、B值、千粒重和空瘪率等8个形态性状与发芽率的关系进行分析。结果表明,6个水松家系间,种子宽度、投影面积、R值、G值、千粒重、空瘪率、发芽势、发芽率存在极显著差异(P<0.01)。发芽率与种子宽度、千粒重显著正相关,与G值、B值显著负相关。通径分析表明,千粒重(X_(1))、R值(X_(2))和G值(X_(3))是影响发芽率(Y)的主要因子,通过多元回归分析建立水松种子发芽率与3个种子形态性状的多元回归方程:Y=8.421+4.870 X_(1)+0.753 X_(2)-1.126 X_(3)。G值对种子发芽率具有直接负向作用(直接通径系数为-1.300)且决定系数(1.690)最大。因此,选用成熟度高的红色种子且避免绿色种子是提高水松种子发芽率的有效途径。
To investigate the influence of seed morphological traits on the germination rate of Glyptostrobus pensilis,the seed length,seed width,seed projected area,seed color(RGB),1000-grain weight,empty seed rate and germination rate of six families from Gutian County,Fujian Province were measured.Taking the seed morphological traits as independent variables,and the germination rate as dependent variables,the path coefficients and determinant coefficient were calculated using correlation analysis and path analysis.The results showed that there were extremely significant differences in seed width,seed projected area,R value,G value,1000-grain weight,empty seed rate,germination potential and germination rate among the six families.Germination rate was significantly positively correlated with seed width and 1000-grain weight,and significantly negatively correlated with G value and B value.Path analysis indicated that the 1000-grain weight(X_(1)),R value(X_(2))and G value(X_(3))were the main factors that affected germination rate(Y).The multiple regression equation of germination rate and these three seed morphological traits was obtained by multiple regression analysis:Y=8.421+4.870 X_(1)+0.753 X_(2)-1.126 X_(3).G value had a direct negative effect(direct path coefficient was-1.300)on germination rate with the largest determination coefficient(1.690).In conclusion,selecting red seeds with high maturity and avoiding green seeds was the effective way to improve the seed germination rate of Glyptostrobus pensilis.
作者
陈建军
汤玉喜
李永进
唐洁
黎蕾
贺光宗
CHEN Jianjun;TANG Yuxi;LI Yongjin;TANG Jie;LI Lei;HE Guangzong(Forestry Bureau of Yuanjiang City,Yuanjiang 413100,Hunan,China;Hunan Academy of Forestry,Changsha 410004,Hunan,China)
出处
《湖南林业科技》
2024年第5期27-32,共6页
Hunan Forestry Science & Technology
基金
中央财政林业草原生态保护恢复资金项目(LY2024A016)
湖南省省级财政林草繁育项目(ZY2023A001)。
关键词
水松
发芽率
形态性状
通径分析
Glyptostrobus pensilis
germination rate
morphological traits
path analysis
