马尾松家系生长稳定性研究

对多个试点马尾松家系试验林 11年生树高、胸径、材积分析结果表明 ,家系间生长及家系在不同地点间生长差异均十分显著 ;同时家系基因型方差分量与“家系×地点”的方差分量在表型方差中都占有较大的比重。可见家系与地点的交互作用显著存在。采用相关系数法、非参数法以及Wricke -生态价法等六种稳定性评价方法对参试家系的稳定性进行评价与比较 ,结果以相关系数和非参数稳定性度量值的评判效果为最佳。以非参数法将参试家系划分为稳定与不稳定二种稳定性类型 ,同时以相关系数法评判 ,将参试家系划分为广泛生境型、优良生境型和不良生境型 3种适应性类型 ;结合各家系生长表现与稳定性测度而将参试家系划分为高产稳定型、高产不稳定型、中产稳定型、中产不稳定型以及低产型五种生长稳定性类型。其中属高产稳定型的家系有 35、 38、 76、 78、 79、 80、 88、 89、 90、 114、 115、 116、 117、 119、 147、15 1等 16个家系可作为马尾松造林区的主要推广对象。

Study on the growth stability of Pinus massoniana

Based on the analysis of height,diameter at breast height,volume of 11 years P.massoniana in different experimental areas,the research results showed growth differences based on location.The variance component different genetic make up in different location were main factors in the index type variance.Using the six appraisal methools for the research of the stability of the plant,the interrelated coefficient method and unparameter stability methods were the best appraisal methods.The plants were separated into two stable breeds by un-parameter stable method:stable breed and unstable breed.The plants were Separated into three fit breeds by interrelated coefficient method:comprehensive breed,superior breed and unfit breed.Based on the growth action and stability determination the expermental P.massoniana were separated into five breeds:high-yield stabel breed,high-yield unstable breed,middle-yield stable breed,middle-yield unstable breed and low-yield breed.The high-yield stable breeds include 16 breeds:35?38?76?78?79?80?88?89?90?114?115?116?117?119?147?151 that are used for afforestation using of P.massoniana.