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火炬松种源主要经济性状的遗传变异及其综合选择 被引量:8

The Genetic Variation of the Main Economic Traits of the Loblolly Pine's Seed Sources and Its Comprehensive Selection
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摘要 对设立在江西省分宜县的9年生火炬松种源试验林的研究表明:多数生长、形质和木材性状具有显著的种源效应,树高、材积、干形、轮枝数、年轮宽和晚材率存在着纬向的地理模式,与原产地的温度密切相关,管胞长度受经度控制,木材基本密度无一定地理变异规律。在种源水平上,木材密度和材积生长呈显著的负相关,管胞长度和材积生长几乎不相关。生长较快的种源,其树干通直且侧枝细小。利用约束和无约束选择指数,根据不同的材种要求,进行了生长、材质的联合选择。认为L5(韦奈,北卡)、L25(琼斯,密西西比)、L28(格兰特,路易斯安娜)是最佳纸浆材种源;L5、L18(卡可挑,阿拉巴马)、L25是建筑材最优种源。 Provenance test of 9-year-old loblolly pine plantation has been conducted.The results show that the effects of seed sources on the growth and wood properties are sig-nificant.Latitudinal geographic model on the height,volume,stem form,whorls of branchesand summer wood % are obviously correlated with the temperature of the original seedsources.The tracheid length was controlled by longitude,There is no geographic variationamong the destity of the wood.There is no correlation between the density of wood and vol-ume growth.The stem with thin branches is straight for the fast-growing seed sources.Based on the selection index,comprehensive selection has been made according to the differ-ent requirements of the timber.
出处 《林业科学研究》 CSCD 北大核心 1994年第4期371-376,共6页 Forest Research
基金 "八五"国家攻关项目
关键词 火炬松 种源 经济性状 遗传变异 loblolly pine,provenance,genetic variation,comprehensive selection
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