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作 者 ：赵志刚;郭俊杰;曾杰*;徐建民;沙二;林开勤

期 刊 ：植物研究 2011年 31卷 1期 页码：100-104

关键词：格木；遗传变异；子代苗期测定；

Keywords:Erythrophleum fordii Oliv., genetic variation, progeny test at seedling stage,

摘 要 ：格木是我国热带和南亚热带地区主要的珍稀濒危树种之一，具有重要的经济和生态价值。本文应用从格木主要天然分布区收集的6个群体的种子进行育苗试验，揭示格木天然群体子代芽苗和幼苗生长变异状况及其与种子性状、亲本环境因子间的相关性。结果表明，格木天然群体子代芽苗和幼苗表型性状在群体间和群体内均存在丰富的变异，苗高的变异高于地径,苗期选择以高生长为主。格木苗期生长与种子的大小、千粒重相关显著，胚根长度与经度、地径与年均气温、高径比与海拔均存在显著的相关性(p＜0.05)。研究结果为深入开展格木良种选育奠定了基础，亦将有助于其天然资源的保护经营和人工种植业的发展。

Abstract:Erythrophleum fordii Oliv. is a rare and endangered tree species with great economic and ecological value in warm subtropical and tropical zones of China. In the present study, variation of seedling growth traits of open-pollinated progeny was investigated within and among six natural populations of this species, and the correlations among seedling growth traits, seed traits, and geographic and climate regimes of their parent populations were analyzed. Significant differences existed in seedling growth among populations as well as among individuals within populations. Variation of seedling height among populations was higher than that of stem collar diameter, so early selection should be conducted mainly on the basis of seedling height. Epicotyl length was in significant positive correlation to seed length as well as seedling height to seed volume, seedling stem collar diameter to weight per 1000 seeds. Radicle length was in significant negative correlation to longitude, as well as seedling stem collar diameter to mean annual rainfall and ratio of height and diameter to altitude. These findings will provide basic data for further studies on genetic breeding, and help facilitate natural resources management and plantation development of E.fordii Oliv..

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