月江杉木2代种子园优树选择研究
Plus Tree Selection of the Second-generation Chinese Fir Seed Orchard in Yuejiang
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摘要: 杉木是四川重要的用材林树种。发掘和利用种子园中杉木优良单株和遗传型,是杉木遗传改良的必然要求。本研究以月江杉木2代种子园为选优目标,采用标准地法,选择出84个遗传型的杉木优树,优树群体由197株母株组成,优树胸径处于25 cm~40.7 cm的区间,平均胸径29.7 cm,优树来源广泛,具有较为丰富的遗传基础,可为新一代种子园的建设和优株无性系化提供材料。Abstract: Chinese fir is one of important timber species in Sichuan province.To explore and utilize the plus tree and good genetic type of the Chinese fir seed orchard is an inexorable demand.The Yuejiang second generation seed orchard of Chinese fir was taken as the selection target in this study.By use of the Standare Block method,84 genotypes were choosen.the plus tree groups were made up of 197 maternal plants,their diameter at breast height were in the range of 25 cm~40.7 cm,their average diameter was 29.7 cm.These plus tree could provide material for building a new generation seed orchard and clonal propagation due to the wide sources with abundant genetic base.