粤北杉木第二代种子园子代遗传测定与选择

Genetic Test and Selection of Progenies from Second-generation Seed Orchard of Cunninghamia lanceolata in Northern Guangdong Province

为选育粤北杉木(Cunninghamia lanceolata)栽培区优良杉木二代家系,为高世代育种准备优良遗传材料,对15 a生的杉木二代家系测定林进行生长调查,检测数据满足方差齐性,方差分析结果表明,家系与重复互作效应不显著,家系效应差异显著。遗传参数估算结果显示,树高、胸径和材积的家系和单株遗传力分别为0.186和0.028、0.252和0.046、0.274和0.048。以"先开展优良家系选择,再选出优良家系中的最优单株"的选择途径,选出优良家系4个,优良单株7个,并进行收集保存,观察确定是优良材料后可补充杉木遗传繁殖材料。

In order to select the superior Cunninghamia lanceolata families in north Guangdong province,and prepare excellent genetic resource for the higher generation breeding,the growth investigation of15-yearold C.lanceolata second generation pedigree was conducted.Bartlett test proved the data meet normality.The ANOVA results showed that there were no significant effect between pedigree and repeat interaction,and the pedigree effect was significantly different.Estimation of genetic parameter showed that the family and individualheritability of tree height,DBH and volume were0.186and0.028,0.252and0.046,0.274and0.048,respectively.Superior family selection firstly,and then select the most superior individual within the superior family,these werethe main method in this study.Four superior families and seven superior individuals were selected and collectedfor collection and preservation.After observation,it was confirmed that they were excellent materials and couldbe supplemented with C.lanceolata propagation materials.