台山红岭种子园湿地松基因资源引入效果分析

１９８９年至１９９６年间，台山红岭种子园从美国、澳大利亚、津巴布韦引入湿地松基因资源种子共４０７份，包括有６个种源、２１３个全同胞家系和１８８个半同胞家系。利用其中３７０份材料营建种源林１片、基因资源林６片，面积共１６．８５ｈｍ＾２。根据这７片测定林的调查数据分析了新引材料的遗传品质以及选择潜力，造林保存率平均达９０％以上；在生长量方面，有６６．６７％的种源、８２．１４％的家系优于台山湿地松初级种

Genetic Evaluation of New Exotic Resources of Slash Pine in Taishan Hongling Seed Orchard

seed lots of slash pine ( Pinus elliottii ) were introduced from United States,Australia and Zimbabwe,from 1989 to 1996. Among these seed lots,there were 6 provenances,188 half sib families,and 213 full sib families.One provenance trial stand,6 gene resource stands were established with a total of 370 seed lots in Taishan Hongling Seed Orchard.And the seed lot from the primary slash pine seed orchard in Taishan was used as control (CK).The total area of these stands was 16.85 hm 2.Based on data from these seven stands,the growth performance and selection potential of these new exotic materials were evaluated,and the reliability of early selection was studied.The results showed that the new materials had good adaptability and the survival rates of stands were above 90%.66.67% provenance and 82.14% families grown better than the CK did.The realized gains were 10.07 % and 30.45% respectively for height and volume growth.It was estimated that the predicted genetic gains of plus trees from these new materials would be 28.51% and 60.79% respectively for height and volume,according to the combined selection method that the top 50% families were selected from these new resources,and then 2 plus trees within each selected family.Correlation coefficients between height growth at age 1,and height,diameter breast height and volume at age 3 and the increment at age 7 were greatly significant.Those families growing poorer at age 3 could not performance very well at age 7.