摘要
对木麻黄科6个树种在广东饶平进行引种试验,结果表明:6种木麻黄胸径、树高、通直度、保存率等性状存在着极显著差异,并具较高的遗传力。由方差分析及多重比较可知,滨海木麻黄、肥木木麻黄、休格尔木麻黄表现较差,生长缓慢、干形差、保存率也低于50%;粗枝木麻黄表现中等;细枝木麻黄、山神木麻黄及对照(短枝木麻黄)生长较好,适应性较强,适宜在广东沿海地区利用和发展。对细枝木麻黄8个种源、粗枝木麻黄9个种源进一步分析对比,结果表明:细枝木麻黄种源间性状差异极显著,且遗传变异系数较大,遗传力较高,选择潜力大,其中15574、13521种源表现最佳,并能获得较高的遗传增益,而13508、15601种源表现较差;粗枝木麻黄种源在树高、胸径2个指标上存在极显著差异,遗传力较高,但在通直度与保存率指标上差异不显著,遗传力较低,其中15938、15941种源表现较好,具有较高的遗传增益,其余种源表现一般。
The filter test on 6 species of Casuarinaceae in Raoping of Guangdong was studied.The result showed that there were significant differences and high heritability among 6 species of Casuarinaceae for height,diameter at breast height（DBH）,stem straightness and survival rate.Compared with other species,Allocasuarina littoralis,Casuarina obesa and Allocasuarina huegeliana had poor performance.Casuarina glauca had general performance.It could utilize and develop Casuarina cunninghamiana,Casuarina collina,and Casuarina equisetifolia（Control,CK） in Guangdong for their good growth and adaptability.Besides,this article conducted further study on the 8 provenances of C.cunninghamiana and the 9 provenances of C.glauca.For the 8 provenances of C.cunninghamiana,the result showed that there were remarkable differences in the tree heights,DBHs,stem straightness and survival rates.The coefficient of genetic variation and heritability were rather high.The provenances of 15574 and 13521 were better,and the 13508 and 15601 were worse than other provenances.For the 9 provenances of C.glauca,there existed significant difference and high heritability in height and DBH,but stem straightness and survival rates showed no obvious difference and had low heritability.The 15938 and 15941 provenances of C.glauca were better than other provenances.
出处
《广东林业科技》
2010年第2期22-29,共8页
Forestry Science and Technology of Guangdong Province
基金
国家"十一五"科技支撑计划子专题"广东沿海纵深防御型防护林体系构建技术试验示范(2006-DAG-03A-1401)"
优质抗逆生态树种木麻黄新品种选育(2006BAD01A1605)专题子专题"广东省抗逆木麻黄新品种选育"
广东省科技厅农业攻关项目"木麻黄优良新品种选育研究(2003C201030)"
"沿海防护林防灾减灾体系构建技术与效益监测研究(2006B20601006)"
广东省林业局林业科技计划"沿海防护林优良树种选育研究(2004-12)"等
关键词
木麻黄
种源试验
遗传力
筛选
Casuarinaceae
species/provenance trial
heritability
selection
