山西农业大学学报（自然科学版）2026，Vol.46Issue(4)：22-35,14.DOI:10.13842/j.cnki.issn1671-8151.202507049
不同家系铁心杉幼苗生长和生理特性差异
Study on differences in growth and physiological characteristics of Iron-Heart Cunninghamia lanceolata(Tiexin Fir)seedlings across different families
摘要
Abstract
[Objective]This study focused on the seedlings of different families of Tiexin Fir(Cunninghamia lanceolata)from the Xiaoxi National Nature Reserve in Yongshun County,Hunan Province.The objective was to systematically analyze the ge-netic variation patterns among different families,and to screen out superior families characterized by rapid growth,well-coordi-nated physiological traits,and strong environmental adaptability.Ultimately,this research aimed to provide germplasm re-sources and theoretical support for the highly efficient breeding and productivity enhancement of Tiexin Fir plantations.[Meth-ods]Eighteen families of Tiexin Fir were cultivated.Twenty-two metrics representing growth and physiological characteristics were measured in 5-month-old and 9-month-old seedlings.Correlation analysis among these indicators were performed,and a comprehensive evaluation was conducted using principal component analysis(PCA)and the membership function method.[Re-sults]Significant differences in growth and physiological characteristics were observed among the different families,with Fami-lies 1,3,4,and 10 exhibiting outstanding comprehensive performance.For Family 3,the seedling height of 9-month-old seed-lings reached 38.88 cm,which was 46.7％higher than the 18-family average(26.5 cm).For Family 10,the ground diameter of 5-month-old seedlings was 1.62 mm(35.0％higher than the average of 1.2 mm),and the proline(PRO)content of 9-month-old seedlings was 58.15 μg/g(69.0％higher than the average of 34.4 μg/g).For Family 1,the annual catalase(CAT)activity ranged from 411.93 to 443.67 U/g FW(52.6％to 64.3％higher than the average of 270 U/g FW),while the malondialdehyde(MDA)content of 9-month-old seedlings was 18.92 μmol/g(57.9％lower than the average of 45 μmol/g).Family 4 showed a well-balanced comprehensive performance,outperforming most families in total root length and root surface area,showing excellent soluble sugar(SS)accumulation capacity and photochemical quenching coefficient(qP),and demon-strating prominent coordination between growth and physiological traits.Meanwhile,the chlorophyll content of these four fami-lies ranged from 1.99 to 2.45 mg/g,which was 0％to 36.1％higher than the overall average of 0.35 mg/g across 5-month-old and 9-month-old seedlings;Their light energy conversion efficiency(Y(Ⅱ))ranged from 0.33 to 0.41,exceeding the 18-fami-ly average(0.35)by 0％to 17.1％.Furthermore,their superoxide dismutase(SOD)and peroxidase(POD)activities were generally superior to the population average,whereas their MDA content was significantly below the average,indicating a supe-rior physiological basis for adaptation.In the PCA and membership function evaluations,the comprehensive evaluation scores of these four families ranked at the top,further validating the synergistic advantages of their growth and physiological traits.[Conclusion]Families 1,3,4,and 10 possess the combined advantages of rapid growth,excellent light energy utilization effi-ciency,and strong physiological adaptability.Consequently,these four families can be prioritized as elite germplasms for the cultivation and targeted breeding of Tiexin Fir plantations.The research results provided a theoretical basis and practical refer-ence for the early germplasm screening and productivity enhancement of Tiexin Fir.关键词
铁心杉/家系/幼苗/生长发育/生理特性/种质筛选Key words
Iron-Heart(C.lanceolata)/Family/Seedling/Growth and development/Physiological characteristics/Germ-plasm screening分类
农业科技引用本文复制引用
潘紫芊,何功秀,郭仝同,朱宁华..不同家系铁心杉幼苗生长和生理特性差异[J].山西农业大学学报（自然科学版）,2026,46(4):22-35,14.基金项目
国家重点研发计划项目(2024YFD2201201) （2024YFD2201201）
