卷荚相思家系子代测定及早期选择

Progeny Determination and Early Selection of Acacia cincinnata Families

为了研究卷荚相思(Acacia cincinnata)不同家系在福建省的生长适应性和差异性,对3年生半同胞家系子代测定林开展了生长性状调查和优良家系的早期选择。结果表明:3年生卷荚相思家系子代的树高平均为194.28±52.55 cm,地径平均为39.59±14.82 mm,冠幅平均为142.95±31.65 cm,家系生长量较大,整体长势较好。统计分析表明,不同家系子代的树高、地径和冠幅生长量均存在显著差异;卷荚相思受遗传控制影响较大,树高、地径和冠幅的遗传力h2分别为48.19%、88.14%和50.02%。通过聚类分析,20个家系可分为3种类型,其中第1种类型为生长上等型,分别为SSE9、SSE11、SSE13、NP17和RD30等5个家系,这些家系可作为优良种质材料进行生产应用;第2种类型为生长中等型,可进一步跟踪观察和选优培育;第3种类型为生长下等型,生长较差,在开发利用方面,可挖掘生长指标以外的潜力。

In order to study the growth adaptability and difference of different families of Acacia cincinnata in Fujian Province,the investigation of growth traits and the early selection of excellent families were carried out in the progeny test forest of three-year-old half-sib families.The results showed that the average tree height,ground diameter and crown width of the offspring of the three-year-old Acacia cincinnata family were 194.28±52.55 cm,39.59±14.82 mm and 142.95±31.65 cm,respectively.The growth of the family was larger and the overall growth was better.Statistical analysis showed as follows:there were significant differences in tree height,ground diameter and crown growth among different families progeny;Acacia cincinnata was greatly influenced by genetic control,and the heritability h 2 of tree height,ground diameter and crown width were 48.19%,88.14%and 50.02%,respectively.Through cluster analysis,20 families could be divided into three types.The first type was the superior growth type,including five families which were SSE9,SSE11,SSE13,NP17 and RD30,respectively.These families could be used as excellent germplasm materials for production and application.The second type was medium growth type,which could be further observed and selected.The third type was the lower growth type,and its growth was poor.In terms of development and utilization,the potential beyond the growth index could be tapped.