摘要
为掌握福建柏生长和遗传变异规律及构建福建柏育种群体,于2010年在福建省安溪半林国有林场对1977年营建的福建柏初级种子园进行单系采种,开展福建柏种子园自由授粉子代测定。结果表明,试验林9 a时树高、胸径、单株立木材积生长整体呈正态分布,试验林1~9 a时,树高、胸径和单株立木材积在区组间、家系间存在极显著差异,家系与区组互作效应在试验林5 a后差异不显著。试验林9 a时树高、胸径、材积平均生长量分别为8.4 m、12.0 cm、0.0490 m^(3),分别比对照(初级种子园混合种子子代)生长量大12.8%、7.1%、11.1%。以材积育种值大于0且入选率为35%为标准,筛选出7个速生优良家系,入选率为33.3%,树高、胸径和单株立木材积的平均值分别为8.4 m、12.2 cm和0.0513 m^(3),平均遗传增益分别为2.16%、4.63%和14.57%;以单株材积育种值大于0且遗传增益大于15%为标准,筛选出优良单株34株,入选率为4.8%,树高、胸径和单株立木材积的平均值分别为9.3 m、14.8 cm和0.08 m^(3),平均遗传增益分别为2.52%、5.46%和20.68%。选育的优良材料进一步丰富了福建柏育种群体,且为初级种子园去劣疏伐提供参考。
In order to understand the growth pattern and genetic variation of Fokienia hodginsii and construct a breeding population,21 free pollinated seeds were collected from the Fokienia hodginsii primary seed orchard established in 1977 for offspring testing.The field experiment used seedling afforestation,a randomized complete block design,and annual growth and preservation rate surveys.At the age of 9 years,the overall growth of tree height,diameter at breast height,and individual standing timber volume in the experimental forest showed a normal distribution.At the age of 1~9 years,there were significant differences in tree height,diameter at breast height,and individual standing timber volume between groups and families in the experimental forest.The interaction effect between families and groups was not significant after the age of 5 years in the experimental forest.The results of annual analysis of variance showed that there were extremely significant differences in the effects of tree height,diameter at breast height,and individual standing timber volume between regions and families in the 1~9 year old experimental forest.The effect of family×region was not significant after 5 years old.At 9 years,the average height,diameter at breast height,and individual standing timber volume of the experimental forest were 12.8%,7.1%,and 11.1%higher than those of the mixed seeds in the primary seed orchard,respectively.Seven fast-growing excellent families were selected based on a breeding value of volume greater than 0 and a selection rate of 35%.The final selection rate was 33.3%,and the average values of tree height,diameter at breast height,and single tree volume were 8.4 m,12.2 cm and 0.0513 m^(3),with an average genetic gain of 2.16%,4.63%and 14.57%.Excellent individual plants were selected based on a positive breeding value for individual plant volume and a genetic gain greater than 15%.34 excellent individual plants were selected with a selection rate of 4.8%.The average values of tree height,diameter at breast height,and individual tree volume were 9.3 m,14.8 cm,and 0.08 m^(3),with an average genetic gain of 2.52%,5.46%,and 20.68%.These excellent materials further enrich the breeding population of Fokienia hodginsii and provide a basis for the thinning of poor quality in primary seed orchards.
作者
肖志坚
XIAO Zhijian(Anxi Banlin State owned Forest Farm,Anxi 362411,Fujian,China)
出处
《福建林业科技》
2024年第2期25-30,共6页
Journal of Fujian Forestry Science and Technology
基金
国家“十二五”农村领域科技计划课题(福建柏新品种选育技术研究,2012BAD01B0505)
福建省林业科学研究项目(福建柏速生优质新品种选育技术与应用,闽林科〔2013〕6号)。
关键词
福建柏
种子园
生长性状
遗传变异
子代测定
Fokienia hodginsii
seed orchard
growth traits
genetic variation
choice
