亚美马褂木扦插繁殖原株表型选择

Phenotypic Selection of Liriodendron sino-am ericanum Ortets for Cuttage Propagation

为了丰富亚美马褂木无性繁殖材料,采用5株优势木对比法,以树高、胸径、单株立木材积为生长指标,结合树冠形质指标开展亚美马褂木扦插繁育原株表型选择。通过对3个地点30株候选优株和150株优势木进行统计分析,确定了亚美马褂木扦插繁殖原株表型选择的标准:扦插繁殖原株树高≥优势木树高均值的1.13倍,扦插繁殖原株胸径≥优势木胸径均值的1.34倍,扦插繁殖原株单株立木材积≥优势木单株立木材积均值的1.84倍,且冠高比小于0.5000。最终筛选亚美马褂木扦插繁殖原株15株,为开展亚美马褂木无性系选育提供了繁育材料。

To enrich the asexual propagation materials of Liriodendron sino-americanum,the phenotypic selection of ortets were performed by the comparison method of 5 dominant trees with growth traits(Height,diameter at breast height and volume)and form-quality traits(crown).Based on the statistical analysis of 30 candidate superior individuals and 150 dominant trees in 3 locations,the criteria of phenotypic selection on ortets of Liriodendron sino-americanum for the cutting propagation were determined:①Height∶Ortet≥1.13 times of dominant tree,②DBH∶Ortet≥1.34 times of dominant tree,③Volume∶Ortet≥1.84 times of dominant tree,and④Crown height ratio was below 0.5000.Finally,15 superior individuals were selected for cutting propagation,which could provide breeding materials for clonal breeding of Liriodendron sino-americanum.