广东省电白县5年生山地木麻黄种源试验及评选  

Provenance Trials of 5-year-old Casuarina junghuhniana at Dianbai,Guangdong,China

作　　者：林什全 仲崇禄[2] 白嘉雨[2] 

机构地区：[1]广东省电白县森林病虫防治检疫站,广东电白525400 [2]中国林业科学研究院热带林业研究所,广东广州510520

出　　处：《林业科学研究》2003年第4期506-510,共5页Forest Research

基　　金：中澳合作项目"国际木麻黄种源试验"(1996-2002);863项目"生态环境建设抗逆林灌木柠条;沙棘等新品种选育"的子专题:木麻黄抗逆新品种选育(2002~2005)的研究内容

摘　　要：A provenance trial of Casuarina junghuhniana was established at Dianbai, Guangdong Province in southern China. All the 28 seedlots of seeds came from Australian Tree Seed Centre. A complete randomized block design was employed with 16 trees per plot and 4 replicates. From 1 to 5 years old, tree heights (H) and diameters at breast height (DBH) were measured, the single tree volume (V) and tree survival percentage (S) were calculated. The results at 5 years old provenances showed that there were significant differences in tree height, DBH and single tree volume among provenances, which indicated that those provenances were genetic variation in tree growth indexes. Provenance genetic variation coefficient (GCV) and broad heritability (H2) were estimated, GCV was 23.54 % in tree height, 35.78 % in DBH and 84.76 % in single tree volume, and H2 were 28.87 % in tree height, 24.98 % in DBH and 21.21 % in single tree volume. Using H, DBH, V and S of 5 years old provenances, by Multiple Objective Strategic Decision Analysis method,the provenances were optimized and ranked. For the purpose of high timber yield in plantation, the selected provenance rate was 25 % of the total seedlots in the trials. Seven seedlots, 19240, 17877, 17878, 19491, 19489, 19490 and 13950, were screened out as better provenances. After selecting, the provenance genetic gains were 16.08 % in tree height, 22.73 % in DBH and 49.61 % in single tree volume.A provenance trial of Casuarina junghuhniana was established at Dianbai, Guangdong Province in southern China. All the 28 seedlots of seeds came from Australian Tree Seed Centre. A complete randomized block design was employed with 16 trees per plot and 4 replicates. From 1 to 5 years old, tree heights (H) and diameters at breast height (DBH) were measured, the single tree volume (V) and tree survival percentage (S) were calculated. The results at 5 years old provenances showed that there were significant differences in tree height, DBH and single tree volume among provenances, which indicated that those provenances were genetic variation in tree growth indexes. Provenance genetic variation coefficient (GCV) and broad heritability (H2) were estimated, GCV was 23.54 % in tree height, 35.78 % in DBH and 84.76 % in single tree volume, and H2 were 28.87 % in tree height, 24.98 % in DBH and 21.21 % in single tree volume. Using H, DBH, V and S of 5 years old provenances, by Multiple Objective Strategic Decision Analysis method,the provenances were optimized and ranked. For the purpose of high timber yield in plantation, the selected provenance rate was 25 % of the total seedlots in the trials. Seven seedlots, 19240, 17877, 17878, 19491, 19489, 19490 and 13950, were screened out as better provenances. After selecting, the provenance genetic gains were 16.08 % in tree height, 22.73 % in DBH and 49.61 % in single tree volume.

关 键 词：电白县 山地木麻黄 种源试验 遗传参数 

分 类 号：S792.93[农业科学—林木遗传育种]