古永林场云南松母树林群体子代测定的初步研究

１９９２年在腾冲县古永林场开展白马河林场、古永林场和保山林场３片部省合建的云南松母树林子代测定。对６年生子代林的测定结果表明：古永林场和保山林场母树林树高的遗传增益分别为１３４９％和２０２３％；树高、分枝数和冠幅的遗传力较高，而地径的遗传力较低；诸性状间存在着较紧密的遗传相关，性状间受基因连锁或共效基因的作用较多，相对受环境的影响较小。在种子调拨上应注意种源分区，最好采用本区的优良种子。白马河林场母树林基地因和试验地的气候差异较大，所产种子在试验区的适应性较差，生产力较低，而来自同一种源区滇西古永林场和保山林场母树林的种子对该区的气候具有较强的适应性，其生长力较高。

Preliminary Study on Progeny Test of Pinus yunnanensisTHZ Seed Production Stand

The progeny tests on 3 Pinus yunnanensisBZ seed production stand from Baimahe forest farm,Guyong forest farm and Baoshan forest farm,were carried out in Guyong forest farm of Tengchong county.The research results indicated the following aspects.The tree height genetic gain of the seed produc tion stand from Guyong and Baoshan forest farm were 1349% and 2023% respectively.The here ditabilities of tree height, branch number and crown mean width were quite high,while that of ground diameter was low. There was close genetic correlation between the determined characters. The relationship between every characters were affected by genelinkage and pleiotropism. The adaptability of seed from Baimahe forest farm seed production stand to Guyong forest farm was low,and the production force is low too,while the seeds from Guyong and Baoshan had good adaptability to the climatic condition of Guyong test site and the production forces were also high. In supplying and allocating forestationusing seeds of Pinus y