149个火炬松自由授粉家系的生长表现  

GROWTH PERFORMANCE OF 149 OPEN-POLLINATED FAMILIES OF LOBLOLLY PINE

作　　者：钟伟华[1] 周达[1] 何昭珩[1] 陈炳铨[1] 石斌[1] 黄少伟[1] 

机构地区：[1]华南农业大学林学院

出　　处：《华南农业大学学报》1998年第1期82-87,共6页Journal of South China Agricultural University

基　　金："八.五"国家攻关项目;广东省重点科技攻关项目

摘　　要：总结了６个测验年度，５～８年的１４９个火炬松自由授粉家系测验结果，表明家系间材积生长有显著差异．按水平表现法得５０分以上的系占４６％，它们的材积增益平均为１１１３％．按选择目的、用途及测验持续时间长短，将它们分为４组；结果还表明，不同来源的家系群优秀率不同，中选家系均优于任一对照。This paper summarized the rresult of 6 testing years involving 149 open-pollinated families aged 5～8 years old of loblolly pine progeny test. It pointed out that there was significant differences among families. Forty-six percent of the families scored higher than 50 points according to the performance level analysis. The average gain of volume was 11.13 percent. The superior families were divided into 4 groups based on the objectives of selection, utilization and the duration of the testing time. The result also showed that the superior ratio differed with different sources of the family population . The selected families were superior to each of the CK. Which strongly proved the effectiveness of the selection improvement.

关 键 词：火炬松 自由授粉家系 子代测验 增益 水平表现法 

分 类 号：S791.255[农业科学—林木遗传育种] S722.8[农业科学—林学]