樟子松引种驯化及遗传效应综合评价

[目的]探讨樟子松生长动态规律,分析与评价家系子代的遗传效应.[方法]以樟子松天然群体家系子代为研究对象,在引种栽培与驯化的基础上,系统开展家系子代的生长节律、遗传变异、生态适应性和抗逆性分析,综合评价了遗传力和遗传增益等遗传参量的遗传效应.[结果]樟子松生态适应性和生态耦合性较强,可快速适应新的生态环境,但是群体间生长性状存在一定变异,其中树高性状变异较小,年均生长量变异较大,平均变异系数分别为20.81％和22.36％;樟子松群体的家系遗传力较强,遗传增益较高,遗传效应显著,树高、2013年生长量和平均生长量3个性状的家系遗传力分别为0.999、0.984和0.993,遗传增益分别为16.64％、19.57％和17.76％.[结论]推荐NGF为优异群体,群体内家系间遗传分化较小,遗传增益较高,生长潜力较大,具广泛推广应用价值.

Introduction,Domestication and Comprehensive Evaluation on Heredity Effects of Pinus sylvestris

[Objective] The growth rhythm and heredity effects of Pinus sylvestris were evaluated.[Method] The progeny from natural populations of Pinus sylvestris were employed to analyze and evaluate the growth rhythm,the heredity variance,the ecological adaptability,the heritability,genetic gain and heterosis on the heredity effects.[Result] Pinus sylvestris had stronger ecological adaptability and coupling,and it can easily adapt to the new ecological environment,the coefficients of variance of seedling height （20.81％） were smaller,but its current increment of height （22.36％） were larger among families.Meanwhile its growth character had strong heritability,high genetic gain,and remarkable heredity effects.The heritability of seedling height,the increment of height in 2013 years,and current increment of height were O.999,O.984 and 0.993,and the genetic gain were16.64％,19.57％ and 17.76％.[Conclusion] It recommended model NGF for outstanding group which has extensive application value.The genetic differentiation between groups within the family was small with high genetic gain and large growth potential.