杉木一代种子园子代测定林早期生长评价

Early Growth Evaluation of Progeny Testing Forest in First Generation Seed Orchard of Cunninghamia lanceolata

对赣南杉木一代种子园子代测定林37个家系、一代混系(CK1)、三代混系(CK2)、扦插无性系苗(CK3)进行早期生长评价。结果表明:参试家系的树高为3.62~4.69 m,树高的变异系数范围为0.0497~0.2583,遗传力范围为0.7417~0.9503;胸径为4.40~6.56 cm,胸径的变异系数范围为0.1061~0.3491,遗传力范围为0.6509~0.8939。树高和胸径之间存在极显著的线性正相关关系,即胸径随着树高的增加而增加。最优类群为类群Ⅲ,其树高和胸径均大于类群均值,初选出类群Ⅲ的优良家系为47号、57号、59号、100号、176号家系。

The early growth of 37 families,first generation mixed line(CK1),third generation mixed line(CK2)and Cunninghamia lanceolata cutting clonal seedlings(CK3)in the first generation seed orchard of Cunninghamia lanceolata in southern Jiangxi were evaluated.The results showed that the tree height of the tested families was 3.62-4.69 m,the coefficient of variation of tree height ranged from 0.0497 to 0.2583,the heritability ranged from 0.7417 to 0.9503;the DBH of the tested families was 4.40-6.56 cm,the coefficient of variation of DBH ranged from 0.1061 to 0.3491,and the heritability ranged from 0.6509 to 0.8939.There was a very significant linear positive correlation between tree height and DBH,that was,DBH increased with the increase of tree height.The best group was groupⅢ,whose tree height and DBH were greater than those of the average value of the group.The families 47,57,59,100,176 in groupⅢwere excellent.