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林业科学 ›› 2002, Vol. 38 ›› Issue (6): 58-65.doi: 10.11707/j.1001-7488.20020611

• 论文及研究报告 • 上一篇    下一篇

华南地区山地木麻黄种源试验与筛选

仲崇禄 施纯淦 王维辉 洪长福 K.Pinyopusarerk   

  1. 中国林业科学研究院热带林业研究所,广州510520;福建省漳州市林业科技推广站,漳州363000;福建省漳州市国有岩溪林场,长泰363902;CSIRO Forestry and Forestry Products, Canberra, Australia
  • 收稿日期:2000-09-15 修回日期:1900-01-01 出版日期:2002-11-25 发布日期:2002-11-25

INTERNATIONAL PROVENANCE TRIALS OF CASUARINA JUNGHUHNIANA IN SOUTHERN CHINA

Zhong Chonglu,Shi Chungan,Wang Weihui,Hong Changfu,K. Pinyopusarerk   

  1. Research Institute of Tropical Forestry, CAF Guangzhou 510520;Station of Forestry Science and Technology Zhangzhou 363000;Yanxi State Forest Farm, Zhangzhou Forestry Bureau Changtai 363902;CSIRO Forestry and Forestry Products, Canberra, Australia
  • Received:2000-09-15 Revised:1900-01-01 Online:2002-11-25 Published:2002-11-25

摘要:

依据首次建立在华南地区的各含28个种源的两片山地木麻黄种源试验数据,分析了1~4a生树高、胸径、单株材积和保存率等4个性状的方差分量、遗传变异系数和遗传力等遗传参数。结果表明树高、胸径、单株材积和保存率在地点间、种源间及种源×地点互作间均有显著或极显著差异。当不考虑种源×地点互作效应互作时,3~4a生性状种源广义遗传力,树高变幅为11.00%~13.80% ,胸径为3.32%~5.55% ,单株材积为5.40%~8.30%。以用材林为培育目的,依据4a生树高、胸径、单株材积和保存率计算的综合评定值大小,分别对两个试验的参试种源进行了排序和选优,以25%的入选率,每试验各有7个种源入选。E968试验的优良种源为18844、19489、19240、17877、19491、19490和19239;E966中优良种源为19238、18847、18853、17877、18950、18852和18949。筛选后树高、胸径和单株材积可获得明显的遗传增益。参试种源树高、胸径、单株材积和保存率性状间均表现出极显著正相关。树高早期表型相关和遗传相关极其显著,可用于树高的早期预测。最后,预测了山地木麻黄优良种源在中国潜在适生范围。

关键词: 山地木麻黄, 种源试验, 遗传参数, 筛选, 华南

Abstract:

The two international provenance trials of Casuarina junghuhniana Miq. were established in Zhangzhou, Fujian Province and Dianbai, Guangdong Province in southern China. The 28 seedlots of seeds all came from Australian Tree Seed Centre, CSIRO. A complete randomized block design was employed for each site, with 16 or 25 trees per plot and 4 blocks or replicates. From 1 to 4 years old, tree height (H, m) and diameter at breast height (DBH, cm) were measured, calculated single tree volume (V) and tree survival percentage (S, %). The results showed that there were significant differences in all traits between sites, between provenances, and between interaction of provenance x site (G x E) , which indicated that those provenances were not only genetic variation in tree growth indexes at each site but also genotype x site interaction. Provenance broad heritability was calculated. Using H, DBH,V and S at 4 years, by the Multiple Objective Strategic Decision Analysis method, provenances in each trial was optimized and ranked. On the purpose of high wood yield in plantation, the selected provenance rate was 25% of the total seedlots in the trials. Then the 7 seedlots 19238, 18847, 18853, 17877,18950,18852 and18949 at Zhangzhou (E 966), and the 7 seedlots 18844, 19489, 19240, 17877, 19491, 19490 and 19239 at Dianbai (E 968), were screened out as better provenances. These seedlot comprehensive estimating index values (Wi) were significantly bigger than the mean value of the whole seedlots. Genetic variation coefficients and broad-sense heritability (H2) of provenance in all traits were estimated from 1 to 4 years after planting. The early age-age phenotypic/genetic correlation coefficients of tree heights from 1 to 4 years old, and between H, DBH, V and S traits were all.significant positive, which could be benefited to the early age-age prediction for tree height, or indirect selection and comprehensive selection for provenance. Possible suitable areas of Casuarina junghuhniana provenances were predicted in southern China, by means of Booth's model.

Key words: Casuarina junghuhniana, Provenance trial, Genetic variation parameter, Selection, Southern China