浙江农林大学学报2025，Vol.42Issue(6)：1165-1173,9.DOI:10.11833/j.issn.2095-0756.20240606
刚竹属竹种表型及纤维特征变异规律
Variation patterns of phenotype and fiber characteristics of bamboo species in Phyllostachys
摘要
Abstract
[Objective]This study aims to investigate the difference and correlation between phenotypic traits and fiber traits in Phyllostachys,and establish fitting equations to characterize these traits,so as to explore the phenotypic variation of Phyllostachys species and establish a research paradigm for bamboo phenotypic characteristics.[Method]Taking 111 species(including intraspecific taxa)of Phyllostachys in China Bamboo Expo Park in Anji,Zhejiang Province as the research objects,variation analysis,correlation analysis,and cluster analysis on 8 phenotypic traits and 8 fiber traits were conducted,and fitting equations among these traits were established.[Result]There were significant inter-species differences in 8 phenotypic traits and 8 fiber traits in Phyllostachys.The coefficients of phenotypic trait variation ranged from 21.75%to 67.72%,among which diameter at breast height(DBH),wall thickness,number of high nodes under branches,and stem height belonged to height variation.Ph.edulis had the highest number of intraspecific ranks,totaling 17.Its phenotypic traits,including wall-to-cavity ratio,height,and node length showed a higher degree of variation than those of the sub species level within the entire genus.There were 39 pairs of significant correlations between 8 phenotypic traits and 8 fiber traits.Among the phenotypic traits of Phyllostachys,wall thickness had a higher correlation with DBH,and stem height had a higher correlation with total number of nodes.There was a highly significant correlation between DBH and the other 7 phenotypic traits.Among the fiber traits,the correlation between fine fiber type A and weighted fine fiber was the strongest.111 species of the genus Phyllostachys were classified into 7 major categories.CategoryⅠwas characterized by significantly thicker walls than other bamboo species.Category Ⅱ was characterized by a higher ratio of wall to cavity.Category Ⅲ was characterized by shorter nodes.Category Ⅳ was characterized by larger DBH,stem height,and branch lengths.Category Ⅴ showed that all phenotypic indicators were slightly lower than the average value of the genus.Category Ⅵ was characterized by significantly lower wall thickness,stem height,total number of nodes,number of high nodes under branches,and node length.Category Ⅶ showed that all phenotypic indicators were slightly higher than the genus average.Fitting equations were established for the phenotypic traits of wall thickness(y1),stem height(y3)and total number of nodes(y4),with DBH(x)as the independent variable.The equations were y1=0.227 7x-0.001 2x2,y3=0.232 1x-0.001 0x2,and y4=1.621 2x-0.012 0x2,respectively.The determination coefficients(R2)were relatively large and all reached an extremely significant level(P＜0.01),which could effectively predict phenotypic traits.[Conclusion]The degree of variation of fiber traits of Phyllostachys is lower than that of phenotypic traits,indicating that the genetic stability of fiber traits is higher than that of phenotypic traits.The higher variation in subspecies,forms,and cultivated varieties of Ph.edulis and Ph.heteroclada indicates that there is great potential for breeding.There is a strong correlation between phenotypes in the genus Phyllostachys,and an increase in DBH will also lead to an increase in other phenotypic traits.[Ch,1 fig.3 tab.25 ref.].关键词
刚竹属/表型性状/纤维性状/拟合方程Key words
Phyllostachys/phenotypic traits/fiber traits/fitting equation分类
农业科技引用本文复制引用
WANG Jiye,YUAN Jinling,ZHAO Dandan,MA Jingxia,LIU Lei,YUE Jinjun..刚竹属竹种表型及纤维特征变异规律[J].浙江农林大学学报,2025,42(6):1165-1173,9.基金项目
国家重点研发计划项目(2023YFD2201901) （2023YFD2201901）
