浙江农林大学学报2024，Vol.41Issue(2)：306-313,8.DOI:10.11833/j.issn.2095-0756.20230371
南洋楹半同胞家系苗期变异及选择
Variation and selection of half-sib families of Falcataria falcata during seedling stage
摘要
Abstract
[Objective]The study aims to explore the genetic variation in seedling growth and nitrogen fixation traits of Falcataria falcata and select fast growing families with strong nitrogen fixation ability.[Method]Seedlings of 1 to 6 months in 37 half-sib families from the 1st generation clonal seed orchard of F.falcata were used as materials.Indicators such as seedling height,ground diameter,relative chlorophyll content,biomass,and number of root nodules were investigated and measured.The methods of genetic variation analysis,correlation analysis and cluster analysis were used to compare growth and select seedlings.[Result]There was no significant difference in growth traits among 1-2 month seedlings in 37 half-sib families,but the height or ground diameter of 4-month seedlings in more than 16 families was significantly better than that of the mixed seeds of mother forests(ck)in Raoping County.The family heritability of seedling height and ground diameter was 0.89-0.90 and 0.84-0.86,respectively,and the genetic progression was 0.118 9-0.221 4 and 0.096 2-0.154 3,respectively,at a selection rate of 30%.There was a highly significant or significant positive correlation between different traits(P＜0.01 or P＜0.05).13 families were selected,accounting for 34%of the population.Compared with the population mean,the realistic gains in seedling height and ground diameter were 27.99%and 12.73%,respectively,and the genetic gains were 24.91%and 10.69%,respectively.Compared with ck,the realistic gains were 62.47%and 41.65%,and the genetic gains were 55.59%and 34.98%,respectively.[Conclusion]The half-sib families of F.falcata have significant genetic variation in growth traits such as seedling height and ground diameter from 4 months of seedling age,and have a high level of family heritability and good selection potential.Based on the synergistic analysis of growth and nitrogen fixation traits,13 excellent families with both seedling growth advantage and efficient nitrogen fixation capacity are selected.[Ch,3 fig.4 tab.23 ref.]关键词
南洋楹/半同胞家系/遗传变异/苗期选择Key words
Falcataria falcata/half-sib family/genetic variation/seedling selection分类
农业科技引用本文复制引用
晏姝,韦如萍,王润辉,黄荣,郑会全..南洋楹半同胞家系苗期变异及选择[J].浙江农林大学学报,2024,41(2):306-313,8.基金项目
广东省林业科技创新项目(2022KJCX007) （2022KJCX007）
广东省林业局自然资源事务专项资金生态林业建设项目(粤林财2022-8) （粤林财2022-8）
