生物多样性 ›› 2002, Vol. 10 ›› Issue (2): 181-188.doi: 10.17520/biods.2002023

• 论文 • 上一篇    下一篇

白皮松天然群体种实性状表型多样性研究

李斌, 顾万春, 卢宝明   

  1. 中国林业科学研究院林业所,北京 100091
    北京市林业局种苗站,北京 100029
  • 收稿日期:2001-05-16 修回日期:2001-12-02 出版日期:2002-05-20

A study on phenotypic diversity of seeds and cones characteristics in Pinus bungeana

LI Bin, GU Wan-Chun   

  1. Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091
    Seed and Seeding Administration,Beijing Forestry Bureau,Beijing 10029
  • Received:2001-05-16 Revised:2001-12-02 Online:2002-05-20

在白皮松天然林分布区共抽取了13个群体,分别测量了5个种实性状。方差分析表明:白皮松种实性状在群体间和群体内存在广泛的变异,5个性状在群体间的F值为2.44~14.68,群体内的F值为7.48~44.53,差异均达显著或极显著水平。群体内的方差分量接近80%,是白皮松表型遗传变异的主要部分。群体间的表型分化系数VST=22.8%,与其他松类树种相比,分化水平处于中等偏上。各群体内变异系数和相对极差存在显著或极显著差异,根据二者的多重比较,可将13个群体按群体内表型变异程度分为4组。种子性状地理梯度变异明显, 呈东北—西南走向。种子3个性状(亲代)的表型变异系数与子代的2年生苗高和地径、1年生苗的全干重之间达到或接近显著相关。

Totally 13 natural populations of Pinus bungeana were collected. Five characteristics, including seed length (SL), seed width (SW), cone length (FL), cone width (FW) and weight (WT) of 1000 seeds, were measured. The variance analysis of the five characteristics showed that there were significant differences among populations with the F value from 2.44 to 14.68, and there were also significant differences among families within a population with the F value from 7.48 to 44.53. The variance factors analysis indicated that the variation within a population was the main part of the phenotypic variation in Pinus bungeana, which stood four out of totally five, but the phenotypic differentiation among populations were very obvious ( VST =22.8%), which meant that there was a strong adaptability to environment pressure in Pinus bungeana . The variation coefficients ( CV ) and relative extreme value ( Ri) within each population show similar tendency. Based on Duncan's Multi comparison analysis, all the 13 populations were divided into four groups. The populations in groups A and B have higher phenotypic diversity while the populations in group C and group D have lower phenotypic diversity. Seed characteristics display a significant ecological gradient variation. There is close relationship between phenotypic diversity of seeds and economic characteristics of progeny.

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