胡桃楸种源家系变异规律及家系选择研究

Variation Regularity among Provenances of Juglans mandshurica and Family Selection

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%。

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 the maximum variation on DBH,and those from Yingchun provenance had minimum variation in all the growth characters.The average variation coefficients of tree height from 3 provenances were between 4.00 % to 41.81 %,12.37 % to 45.40% and 2.76 % to 38.41 %,respectively.Compared to one year-old progeny,the family variation amplitude of seven year-old progeny from 3 provenances decreased by 4.04 %,2.57 % and 4.71 %,respectively.Differences in variations among provenances and families were significant or most significant.Compared to one year-old progeny,the gaps between fast and slow growing families of 7-year-old progeny from Tieli and Muling proven seven year-old progeny from Tieli,Muling were reduced by 65 % and 5.4 % respectively,from Yingchun however,increased by increased by 67.7 %.Among 13 families selected,8 were from Yingchun,4 from Tieli and Muling,respectiveyly.The tree height and DBH for those selected 44.8 % and 46.9 % more than the average ones in their families.