摘要
对霍山县茅山试点49个杉木种源7年生的林分,作树高、胸径、侧枝长度、枝干比和节间距的多元方差分析和聚类分析,以及上述生长和冠型性状与产地的纬度、经度、海拔、年均温、年降雨量、≥10℃积温和无霜期的多元回归和典型相关分析。结果表明,各种源经长期自然选择形成的生长冠型性状不随着产地的地理气象因子梯度呈连续性变化;依据5个生长冠型因子,49个种源聚成8类,有效基因集积中心在南岭山地;广西融水、湖南会同、贵州锦屏和四川彭县是大别山区杉木的优良种源。
A 7—year—old provenance testing with 49 seedlots was studied at Mao-shan Forest farm,Huoshan county,Anhui Province. The methods of multiva riation regression analysis and canonical correlation were used for analysis.And the results show that 5 characters of growth and crown form (such asheight. PBH,branch length, branch-stem ratio and internode distance) varieddiscontinuously with the 7 original geographical and meterological factors(northlatitude,east longitude elevation, average annual temperature, average annualprecipitation, accumulative temperature above 10℃ and frost-free period). The49 provenances were divided into 8 groups,and there were significant differencebetween the groups, according to the results of cluster analysis and variancetest on the 5 characters of growth and crown form. The best performed pro-venances of Chinese Fir are in the areas of Nanling Mountain (or so-calledFive Ridges). The adapted provenances in Dabie Mountains seem to be theseseedlots from Rongshui, Guangxi province; Huitong, Hunan province; Jing-ping,Guizhou province and Pengxian,Sichuan province.
关键词
杉木
种源
多元统计分析
地理变异
Cunninghamia lanceolata
Chinese Fir
Provenance test
Multivariate analysis
