[1]汪挺,谭健晖,李鹏,等.二代种子园马尾松苗期耐旱型优良家系的筛选[J].森林与环境学报,2020,40(06):627-635.[doi:10.13324/j.cnki.jfcf.2020.06.009]
 WANG Ting,TAN Jianhui,LI Peng,et al.Selection of drought-tolerant Pinus massoniana families at the seedling stage from a second-generation seed orchard[J].,2020,40(06):627-635.[doi:10.13324/j.cnki.jfcf.2020.06.009]
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二代种子园马尾松苗期耐旱型优良家系的筛选()
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《森林与环境学报》[ISSN:2096-0018/CN:35-1327/S]

卷:
40卷
期数:
2020年06期
页码:
627-635
栏目:
出版日期:
2020-11-15

文章信息/Info

Title:
Selection of drought-tolerant Pinus massoniana families at the seedling stage from a second-generation seed orchard
作者:
汪挺1 谭健晖23 李鹏23 唐生森23 杨章旗123
1. 广西师范大学生命科学学院, 广西 桂林 541006;
2. 广西壮族自治区林业科学研究院, 广西 南宁 530002;
3. 广西马尾松工程技术研究中心, 广西 南宁 530002
Author(s):
WANG Ting1 TAN Jianhui23 LI Peng23 TANG Shengsen23 YANG Zhangqi123
1. College of Life Sciences, Guangxi Normal University, Guilin, Guangxi 541006, China;
2. Guangxi Zhuang Autonomous Region Forestry Research Institute, Nanning, Guangxi 530002, China;
3. Engineering Research Center of Masson Pine of Guangxi, Nanning, Guangxi 530002, China
关键词:
马尾松家系干旱胁迫耐旱性筛选
Keywords:
Pinus massonianafamilydrought stressselection of drought tolerance
分类号:
S728.2
DOI:
10.13324/j.cnki.jfcf.2020.06.009
摘要:
为了筛选出持续自然干旱胁迫下马尾松耐旱型优良家系,以二代种子园54个马尾松优良家系(19-201~19-255)幼苗作为研究对象,调查其在持续自然干旱胁迫下苗高、地径、萎蔫度和存活率等生长指标,运用因子分析和隶属函数法综合评价不同家系马尾松幼苗的耐旱性,并利用聚类分析进行分等定级。结果表明:干旱胁迫下各生长指标变异幅度较大,苗高增长量为0.6~1.8 cm,变异系数为35.17%;地径增长量为0.01~0.38mm,变异系数为96.02%;萎蔫度为34.48%~68.00%,变异系数为13.00%;存活率为23.33%~96.67%,变异系数为28.00%。其中,地径增长量与存活率呈极显著正相关,与萎蔫度呈极显著负相关;萎蔫度与存活率极显著负相关。家系间综合耐旱度量D值差异较大,变幅为0.090~0.748,19-249和19-220家系的D值较高,分别达到0.748和0.743;19-208和19-219家系的D值较低,分别为0.090和0.235。系统聚类分析将54个家系耐旱性划分3类:Ⅰ类(高度耐旱型,14个家系);Ⅱ类(耐旱型,29个家系);Ⅲ类(干旱敏感型,11个家系)。复水干旱胁迫试验表明,保存率变异幅度为0-66.67%,保存率与D值的回归方程为y=0.946x-0.154(R2=0.562),说明保存率与D值存在较好的直线回归关系。因子分析和隶属函数能够有效用于马尾松耐旱家系筛选,19-249和19-220家系的耐旱效果最佳。
Abstract:
Pinus massoniana family seedlings(19-201-19-255) from second-generation seed orchards were used to determine the most drought-tolerant families under chronic stress. The growth parameters(change in height, ground diameter, wilting degree, and survival rate) of 54 family seedlings were measured, and the family drought tolerances were evaluated by factor analysis and membership function. The drought tolerance rating of each family was classified by cluster analysis. The seedling height distribution was 0.6-1.8 cm, coefficient of variation(CV)=35.17%, the diameter growth distribution was 0.01-0.38 mm, CV=96.02%, the wilting degree was 34.48%-68.00%,CV=13.00%, and the survival rate was 23.33%-96.67%,CV=28.00%. The ground diameter growth was significantly positively correlated with the survival rate and significantly negatively correlated with the wilting degree; the wilting degree was significantly positively correlated with the survival rate. The comprehensive drought tolerance(D-values) significantly differed among families, ranging from 0.090 to 0.748. The D-values of families 19-249 and 19-220 were the highest(0.748 and 0.743, respectively), while those of families 19-208 and 19-219 were the lowest(0.090 and 0.235, respectively). Clustering analysis divided the families into three drought tolerance levels: class I(highly drought-tolerant, 14 families), class Ⅱ(drought-tolerant, 29 families), and class Ⅲ(drought-sensitive, 11 families). The experiment of rewater after drought stress showed that the preservation rate ranged from 0 to 66.67%, and the preservation rate versus D-value equation was y=0.946x-0.154(R2=0.562), indicating a strong linear relationship. P. massoniana drought-tolerant families can be identified by factor analysis and membership function, and families 19-249 and 19-220 were found to be the most drought tolerant.

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备注/Memo

备注/Memo:
收稿日期:2020-08-10;改回日期:2020-09-26。
基金项目:广西科技基地各人才专项(桂AD19254004);广西创新驱动项目(AA17204087-1);广西八桂学者专项;广西八桂青年学者专项;广西自然科学基金项目(2019GXNSFBA245064)。
作者简介:汪挺(1992-),男,硕士研究生,从事林木遗传育种学研究。Email:wangting6208@163.com。
通讯作者:杨章旗(1964-),男,教授级高级工程师,博士,从事林木遗传育种学研究。Email:yangzhangqi@163.com。
更新日期/Last Update: 1900-01-01