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云南铁杉地理种源表型变异研究

Phenotypic Var ia tion of Geographic Provenance in Tsuga dum osa

  • 摘要: 分析了云南丽江、怒江、临沧、保山、普洱5个地区的9个云南铁杉地理种源间的数量性状变异,进行了不同种源的栽培试验。结果表明:不同地理种源间球果长、种翅长、种鳞数、千粒质量等12个数量性状指标有显著差异;主成分分析得出形态分化是地理因子、水分因子、温度因子综合作用的结果;相关分析得出地理变异在海拔梯度上呈连续渐变,在纬向上呈随机渐变。3年栽培试验表明:不同地理种源苗木的高、径生长性状差异明显,以3年生苗高为依据筛选出月利、河源、山神庙、狗钻洞4个优良种源。

     

    Abstract: Nine p rovenances of Tsuga dum osa (D. Don) Eichlerwere collected from 5 distribution areas in Yunnan.The quantitative trait variation of different p rovenances was studied and p rovenance test was carried out. The variance analysis showed that there were significant differences in the 12 quantitative traits among the p rovenances. Itwas found that geograph, water and temperature were the main factors affecting the morphological differentiation byusing the method of p rincipal component analysis. Correlation analysis indicated that geographic variation of Tsugadum osa was continuous by altitude gradient, and the variation was random by latitude factor. After three-year cultivation, there were distinct differences in growth characteristics among 9 p rovenances. Four superior p rovenanceswere selected according to the standard height of 3-year-old seedling.

     

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