胡桃楸种源家系变异规律及家系选择研究

利用黑龙江省林口县青山林场3个种源122个家系7 a生胡桃楸子代林材料,分析种源、家系变异规律并对家系进行初步选择。种源树高、胸径变异系数分别为32.17%4、3.25%,穆棱种源树高变异最大,铁力种源胸径变异最大,迎春种源生长性状变异都小。铁力、穆棱及迎春种源家系间树高平均变异系数分别为4.00%~41.81%、12.37%~45.40%及2.76%~38.41%,3个种源7 a生与1 a生相比家系变异幅度分别缩减4.04%、2.57%及4.71%。种源间、家系间差异达显著或极显著水平,铁力、穆棱种源7 a生高生长快慢家系差距较1 a生分别缩小65%、5.4%,迎春种源则扩大67.7%,入选13个家系中迎春种源8个,铁力、穆棱分别4个,树高、胸径分别超过家系均值为44.8%4、6.9%。

Variation Regularity among Provenances of Juglans mandshurica and Family Selection

By using 122 families of,7-year-old Juglans mandshurica progeny forest belonging to 3 provenances(Muling,Tieli,and Yingchun) in Linkou County,Heilongjiang Province as materials,variation regularities of provenances and families were investigated,and a preliminary family selection was conducted.The coefficients of variation on height,diameter at breast height(DBH) were 32.17 % and 43.25 % respectively.Those from Muling provenance had the maximum variation of tree height,those from Tieli provenance exhibited ...