长白落叶松变异分析及优良家系早期选择

Genetic Variation and Early Selection of Larix olgensis Families

以黑龙江省鹤岗市林木良种繁育中心的84个长白落叶松自由授粉家系子代林为研究对象,测定其树高,结合变异分析、方差分析、多重比较及年生长量分析等,对长白落叶松家系进行早期选择。结果表明:长白落叶松树高性状存在丰富的变异,变异系数幅度为26.81%~35.66%。来源于渤海、错海、鹤岗及林口4个种子园家系的平均变异依次为30.50%、30.47%、28.97%、30.12%,依次比对照大8.62%、8.51%、3.17%、7.26%。4年生、5年生、6年生时树高在家系水平上差异均达到极显著水平,树高遗传力平均为90.7%,20%入选率时,遗传增益平均为38.74%。结合多重比较及树高生长量分析结果,最终选择出生长良好、生长快且稳定的家系为BS54、BS542、CH4、HG28及LK299,且6年生时,平均树高为1.34m,平均变异系数为31.62%,平均年生长量为0.43m,平均现实增益为36.66%。

The progeny forests of 84 open-pollinated families of Larix olgensis were taken as the research objects,and the tree height was measured at the improved Varieties Breeding Center of Hegang in Heilongjiang province.The early selection of L.olgensis families was carried out by combining variation analysis,variance analysis,multiple comparisons and annual growth analysis.There were abundant variations in tree height with the variation coefficient of 26.81%~35.66%.The average variation coefficients were 30.50%,30.47%,28.97%and 30.12%,respectively for four families from Bohai,Cuohai,Hegang and Linkou,which were 8.62%,8.51%,3.17%and 7.26%higher than CK,respectively.Families at 4,5,and 6 years old showed significant differences in height,and the average heritability of tree height was 90.7%.Under the selection rate of 20%,the average genetic gain of tree height was 38.74%.Combining the results of multiple comparisons and annual growth analysis of height,BS54,BS542,CH4,HG28 and LK299 were selected as the superior families.