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对辽宁大孤家12个日本落叶松×长白落叶松混合授粉及单系授粉杂交组合及4个相应母本自由授粉家系进行扦插生根变异及其测定林3～5年生长变异的分析,研究父母本对组合间生根和生长性状变异的贡献,并在此基础上选出高生长量及生根力的杂交组合。研究表明:无论是生根性状还是幼林生长性状,日×长杂种组合间均存在着显著遗传变异,父、母本效应明显,组合间具有很大的选择潜力;生根性状间、生长性状间存在着紧密的相关关系,但生根与幼林生长性状之间相关不紧密,可以开展生根与生长性状的独立选择;利用隶属函数法选出了生根最优、生长与生根兼优的杂交组合(或家系),选出的4个生根与生长兼优的家系5年生平均树高、地径和保存率分别比4个母本对照家系的平均值提高24.7%、28.9%和55.6%,而生根性状与其基本一致。
Twelve Ragwort × Larix olgensis hybrid pollination and single-line pollination crosses and four corresponding female parent pollination families in Dagoyao of Liaoning Province were used to analyze the rooting variation of cuttings and their variation of growth in three to five years. This contribution to the variation of rooting and growth traits among the combinations, and on this basis, the hybrid combination of high growth and rooting ability was selected. The results showed that there was significant genetic variation between the hybrid combinations of Japanese × Long hybrids both in rooting and young growth traits, with obvious parent and female effects and great potential for selection among combinations. There were some differences between rooting and growth traits But the correlation between rooting and the growth traits of young forest is not close, and the independent selection of rooting and growth traits can be carried out. The hybrid combination (or pedigree) with the best rooting, , The average tree height, diameter and preservation rate of 4-year-old and 4-year-old families with good growth were 24.7%, 28.9% and 55.6% Consistent.