文献类型：期刊文献

中文题名：8年生火力楠半同胞家系遗传评价与选育

英文题名：Genetic Evaluation and Selection of 8-Year-Old Semi-Sibling Family of Michelia macclurei

作者：姜清彬[1] 孟景祥[1] 李保军[2] 陈海军[2] 方碧江[3] 郭朗[1] 田生辉[1]

第一作者：姜清彬

机构：[1]中国林业科学研究院热带林业研究所,广州510520;[2]广东省云浮林场,云浮527400;[3]福建省华安金山国有林场,华安3638033

年份：2025

卷号：61

期号：1

起止页码：104-114

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：;EI(收录号：20250717868872);北大核心:【北大核心2023】；

基金：广东省林木种质资源调查项目(GDZZDC20228702);国家重点研发计划项目(2017YFD0601101)。

语种：中文

中文关键词：火力楠;半同胞家系;生长性状;形质性状;家系遗传力;综合选育

外文关键词：Michelia macclurei;half-sib family;growth traits;phenotypic feature;family heritability;comprehensive traits selection

分类号：Q958.15;S154.5

摘要：【目的】研究火力楠生长指标和形质性状在不同半同胞家系间的遗传变异,探究遗传型和环境互作对火力楠生长发育的影响,筛选综合性状良好的半同胞家系,为火力楠优良品种选育提供重要遗传信息和育种材料。【方法】以采集自广东和广西等12个火力楠天然和次生林分的75个家系的种子为试验材料,于广东和福建两地采用随机区组设计建立半同胞家系测定林,在2年生和3年生时进行生长指标调查,4年生和8年生时进行生长指标和形质指标调查。利用ASReml v3.0软件分析2个试验点中75个家系的各指标均值和标准差、家系遗传力和B型相关值。以8年生性状遗传关联结果为参考,采用材积性状育种值和形质性状综合育种分别对广东和福建试验材料进行综合筛选。【结果】在各测定年龄,75个家系树高、胸径、材积、主干通直度、主干分叉性、侧枝粗细、侧枝分枝角和枝下高等性状上存在极显著差异(P<0.01)。2~8年生树高和胸径、8年生主干分叉性、8年生侧枝粗细、8年生侧枝分枝角和8年生枝下高在2个试验点中的家系遗传力均大于0.25,受遗传影响较大,具有一定选育潜力。B型相关分析结果显示,各性状受家系×环境效应影响为中等或较大,说明火力楠性状评价和遗传选育必须考虑遗传型和环境互作效应影响。Pearson相关分析结果显示,家系树高、胸径与材积性状具有高度相关性,但与主干分叉性、侧枝粗细、侧枝分枝角存在负相关。经育种值筛选,在广东试验点获得综合性状优良家系1个(F44)、在福建试验点获得综合优良家系1个(F7)。【结论】所有性状在火力楠家系间均存在显著或极显著差异,各性状在地点间也存在显著差异,生长和形质指标变异受遗传型和环境互作效应影响较大,其中材积性状同时具有较大的表型变异系数和遗传变异系数,选育潜力较大。在2个试验点各选出1个综合性状优良的家系,分别为广东的F44和福建的F7。本研究结果可为今后火力楠主要性状的遗传评价提供重要信息,并对进一步多性状良种选育提供核心育种材料。
【Objective】In this study,the genetic variation of growth and morphological traits among different half-sib families of Michelia macclurei was investigated.The purpose of the study is to explore the interactions between genotype and environment on the growth and development of M.macclurei,screen out half-sib families with excellent comprehensive traits,and provide important genetic information and breeding materials of M.macclurei.【Method】In this study,seeds from 75 families were collected from 12 natural and secondary stands of M.macclurei in Guangdong and Guangxi.A random block design was used to establish a semi sibling pedigree test forest in Guangdong and Fujian.Indexes reflecting growth rates were measured at 2-year-old and 3-year-old,while both growth and morphological indexes were measured at 4-year-old and 8-year-old.The ASReml v3.0 software was utilized to analyze the mean and standard deviation of various indicators,as well as family heritability(narrow sense),and B-type correlation values for 75 families across two test sites.Based on the genetic correlation results of 8-year-old traits,the breeding value of volume traits and aggregate breeding value of morphology traits were used to selected superior families in Guangdong and Fujian respectively.【Result】There were significant differences(P<0.01)in height(H),diameter at breast height(DBH),volume(VOL),straightness(SFS),trunk bifurcation(SFA),branch thickness(TPB),branch angle(APB),and stem height(HUB)among 75 families at different ages.The family heritability of H and DBH traits at 2–8 years old,SFA,TPB,APB and HUB at 8-year-old was all greater than 0.25,indicating that these traits are highly influenced by genetic factors and have potential for breeding improvement.However,the results of B-type correlation analysis showed that all traits were moderately or significantly affected by families and environment,indicating that the interaction of environment and genotype must be taken into account in character evaluation and genetic breeding of M.macclurei.Pearson correlation analysis revealed that H and DBH of the families were highly correlated with the VOL,but negatively correlated with SFA,SFS,TPB,and APB.By aggregate breeding values,one superior family(F44)was obtained from Guangdong experimental site and one superior family(F7)was obtained from Fujian experimental site.【Conclusion】There are significant or extremely significant differences in all traits among the families of M.macclurei,and there are also significant differences among the traits among the sites,and the variation of growth and morphological indexes is greatly affected by the interaction of genotype and environment.Among them,volume traits have a large phenotypic variation coefficient(PVC)and genetic variation coefficient(GVC),and have a large breeding potential.One family with superior comprehensive traits has been selected in each of the two experimental sites,namely F44 from Guangdong and F7 from Fujian.This study provides important information for the genetic evaluation of the main traits of M.macclurei in the future,and provides core breeding materials for further multi-trait breeding.