桂花表型变化的环境依赖特征

郑孙元; 朱弘; 金思雨; 王梦娟; 孙杰; 谷诚诚

doi:10.3969/j.issn.1000-2006.201808039

桂花表型变化的环境依赖特征

郑孙元,朱弘,金思雨,王梦娟,孙杰,谷诚诚, 裴引祎,王贤荣,段一凡

南京林业大学学报（自然科学版） ›› 2019, Vol. 43 ›› Issue (02) : 38-46.

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南京林业大学学报（自然科学版） ›› 2019, Vol. 43 ›› Issue (02) : 38-46. DOI: 10.3969/j.issn.1000-2006.201808039

研究论文

桂花表型变化的环境依赖特征

郑孙元¹,朱弘¹,金思雨²,王梦娟²,孙杰²,谷诚诚², 裴引祎²,王贤荣^1*,段一凡^1*

作者信息 +

Environment-dependent phenotypic variation of Osmanthus fragrans

ZHENG Sunyuan¹, ZHU Hong¹, JIN Siyu², WANG Mengjuan², SUN Jie², GU Chengcheng², PEI Yinwei², WANG Xianrong^1*, DUAN Yifan^1*

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摘要

【目的】揭示桂花(Osmanthus fragrans Lour.)的表型分化程度和地理变异规律。【方法】通过聚类分析、方差分析、相关性分析等方法研究26个桂花居群叶表型及9个桂花居群花表型变异情况及与地理-气候环境因子的相关性。【结果】桂花叶表型性状存在相当程度的变异,叶片8个性状变异程度各有差异; 根据方差分析结果,居群间变异占75.04%, 居群内占13.28%,居群间的变异是主要的变异来源。以地区而言,平均变异系数为19.08%,变异系数最大的是湖北桂花镇居群(29.73%),而贵州夫子坝居群最小(13.68%)。就花表型而言,花序数目及花梗长变异离散程度最大。桂花与经纬度、温度季节性变化方差、最热月最高温度等7个环境影响因子存在显著或极显著相关性。叶先端角度呈现由西向东减小的趋势,花瓣性状呈现由南到北逐渐变大的趋势。聚类分析结果可以明显将26个群体分成3组。【结论】桂花表型数量性状的变异相当丰富,且与地理-气候环境因子的相关性较密切,研究结果可以为桂花种质资源的保护和利用奠定基础。

Abstract

【Objective】Reveal the phenotypic diversity and geographical variation patterns of Osmanthus fragrans.【Method】Cluster analysis variance analysis and correlation analysis were used to study the leaf phenotypic traits of 26 O. fragrans populations, the flower phenotypic traits of 9 O. fragrans populations, and their variability and correlation with geographical-climatic factors. 【Result】The phenotypic traits of O. fragrans were variable and there were differences in the degree of variation of the eight leaf characteristics. According to the results of the analysis of variance, the phenotypic variation was 75.04% among populations and 13.28% within populations. The main source of variation was from among the populations. In terms of the regions, the average coefficient of variation was 19.08%, and the largest coefficient of variation occurred in the Guihua Town population(29.73%)from the Hubei Province, while the Fuziba population from the Guizhou Province was the smallest(13.68%). In terms of floral phenotypes, the number of inflorescences and pedicels showed the greatest degree of discrepancies. O. fragrans has significant or extremely significant correlations with seven environmental impact factors, such as the latitude, longitude, temperature seasonality, and max temperature of the warmest month. There was a significant or extremely significant correlation between all types of traits. The apex angle of the leaves showed a trend of decreasing from west to east, while the petal traits showed an increasing trend from south to north. The cluster analysis results showed that 26 populations could be clearly divided into 3 groups.【Conclusion】There is a high degree of variation and a rich diversity in the phenotypic traits of O. fragrans. Additionally, O. fragrans are closely related to geo-climatic factors. These results can lay the foundation for the protection and innovation of O. fragrans germplasm resources.

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郑孙元,朱弘,金思雨,王梦娟,孙杰,谷诚诚, 裴引祎,王贤荣,段一凡. 桂花表型变化的环境依赖特征[J]. 南京林业大学学报（自然科学版）. 2019, 43(02): 38-46 https://doi.org/10.3969/j.issn.1000-2006.201808039

ZHENG Sunyuan, ZHU Hong, JIN Siyu, WANG Mengjuan, SUN Jie, GU Chengcheng, PEI Yinwei, WANG Xianrong, DUAN Yifan. Environment-dependent phenotypic variation of Osmanthus fragrans [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2019, 43(02): 38-46 https://doi.org/10.3969/j.issn.1000-2006.201808039

中图分类号： S685.13

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基金

收稿日期:2018-08-17 修回日期:2019-01-02
基金项目:中国博士后科学基金项目(2016M590462); 江苏省自然科学基金青年基金项目(BK20160932); 江苏省高校自然科学研究面上项目(15KJB180007)。
第一作者:郑孙元(1622262996@qq.com),ORCID(0000-0002-1541-1541)。
*通信作者:王贤荣,教授,博士,负责论文框架设定与修改,ORCID(0000-0002-7940-909X)。段一凡(yifan419@hotmail.com),副教授,博士,负责指导项目的具体实施,ORCID(0000-0002-1834-9337)。