文献类型：期刊文献

中文题名：垂枝杉与黄枝杉正反交F_(1)代的株型性状分析

英文题名：Analysis of Plant Type Traits in the F_(1)Generation from Reciprocal Crosses Between Cunninghamia lanceolata cv.Luotian and Cunninghamia lanceolata

作者：孙贺[1,2] 段爱国[1] 张建国[1] 袁慧[3] 刘娟娟[1]

第一作者：孙贺

机构：[1]林木资源高效生产全国重点实验室,国家林业和草原局林木培育重点实验室,中国林业科学研究院林业研究所,北京100091;[2]中南林业科技大学林学院,湖南长沙410004;[3]湖北省林业科学研究院,湖北武汉430075

年份：2025

卷号：38

期号：3

起止页码：120-127

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：;北大核心:【北大核心2023】；

基金：国家“十四五”重点研发计划项目课题“杉木高产优质高效新品种选育研究”(2022YFD2200201)。

语种：中文

中文关键词：垂枝杉;正反交;F_(1)代;株型性状;表型分析

外文关键词：Cunninghamia lanceolata cv.Luotian;Reciprocal crosses;F_(1)generation;plant type traits;Phenotypic analysis

分类号：S722.5

摘要：[目的]了解垂枝杉与黄枝杉杂交子代的株型性状特点,为杉木生产和垂枝性状研究提供不同材料。[方法]以垂枝杉与黄枝杉进行正、反交,得到F_(1)代分离群体,测定双亲及后代群体的株型性状,对其性状表现、性状间相关性和子代类别进行分析。[结果]正交的子代节数显著高于反交,反交的子代节间距离显著高于正交,且正交子代的枝条基部直径表现为正态分布。冠幅、节数和枝条长度的变异系数为21.06%~27.02%,有较大选择潜力。但节间距离、分枝角度和枝条基部直径的变异系数为15.06%~19.77%,分离不广泛,选择潜力较小。在节数大于18的区间内,正交子代占比显著高于反交子代。在节间距离大于20 cm的区间内,正交子代占比显著低于反交子代。正反交子代聚集成分枝角度45°~80°和80°~125°的两个群体,但两个群体的比例不受父母本的显著影响。杂交子代的分枝角度、冠幅、分枝长度、枝条基部直径和节数等性状相互影响,其中分枝角度与节数和节间距离呈显著正相关,与冠幅、分枝长度和枝条基部直径呈显著负相关。聚类分析得出4类不同的垂枝株型和非垂枝株型,可根据不同生产和研究目标加以利用。[结论]以垂枝杉为父本,更容易从子代中筛选出节间距离大的杉木单株。以垂枝杉为母本,更容易筛选出节数多的单株。垂枝杉与黄枝杉的杂交子代中,无论是垂枝株型还是非垂枝株型的比例分布,均不受父母本的显著影响。从子代中筛选出的节间距离大(大于20 cm)、极端分枝角度(大于90°和小于70°)等不同性状的优株,可为生产提供不同品质的用材,并为杉木垂枝性状形成机理等研究提供试验材料。
[Objective]To investigate the plant type characteristics of hybrid progeny derived from Cunning-hamia lanceolata cv.Luotian and Cunninghamia lanceolata,and to provide diverse materials for Chinese fir production and research on pendant branch traits.[Method]Reciprocal crosses were conducted between Cunninghamia lanceolata cv.Luotian and Cunninghamia lanceolata to obtain F_(1)segregating pop-ulations.The plant type characteristics of both parents and the progeny population were measured,and their trait expressions,correlations among traits,and progeny categories were analyzed.[Result]The number of nodes in the progeny from orthogonal cross was significantly higher than that from the reciproc-al cross.The internode distance of the reciprocal cross was significantly higher than that of the orthogonal cross.The basal branch diameter of the forward-cross progeny exhibited a normal distribution.The coeffi-cients of variation for crown width,number of nodes,and branch length ranged from 21.06%to 27.02%,in-dicating considerable selection potential.However,the coefficients of variation for internode distance,branch angle,and basal branch diameter ranged from 15.06%to 19.77%,showing limited separation and selection potential.Among progeny more than 18 nodes,the proportion of progeny from the forward-cross was significantly higher than that from the reciprocal cross.Conversely,among progeny with an internode length exceeding 20 cm,the proportion of forward-cross individuals was significantly lower than that of re-ciprocal-cross individuals.Both forward and reciprocal progeny clustered into two groups based on branch angles(45°~80°and 80°~125°),and the proportion of these two groups was not significantly influenced by the parental lines.The branch angle,crown width,branch length,basal diameter of the branch,and number of nodes in the hybrid progeny were interrelated.The branch angle was significantly positively cor-related with the number of nodes and internode distance,but significantly negatively correlated with crown width,branch length,and basal diameter of the branch.Cluster analysis identified four different types of pendant and non-pendant plant types,which can be utilized based on different breeding and research ob-jectives.[Conclusion]Using Cunninghamia lanceolata cv.Luotian as the male parent tends to yield pro-geny with larger internode distances.As the female parent,it is more likely to produce progeny with a high-er count of nodes.The ratio of pendant to non-pendant plant types in the progeny is not notably affected by the parental plants.Superior progeny with long internodes(>20 cm)and extreme branch angles(>90°or<70°)can be valuable for breeding different wood quality traits and serve as experimental materials for in-vestigating the genetic mechanisms underlying pendulous traits in in Cunninghamia lanceolata.