摘要
为了明确枣核心种质的遗传多样性和变异特点,了解枣裂果性状与果实(核)性状的相关性,提高枣种质的利用效率,本研究对枣核心种质的果实、果核和裂果等相关的9个重要表型性状指标进行了测定和统计分析。结果显示:1)核心种质资源具有较丰富的表型变异,9个表型性状的变异系数均达20%以上,平均变异系数为39.00%;其Shannon-Wiener's多样性指数为1.49~1.93,平均多样性指数为1.77。2)相关性分析结果显示,9个表型性状指标之间存在不同程度的相关性,多个果实(核)表型性状之间均存在显著相关性(正相关或负相关),果实横径与裂果率达到显著的正相关,果形指数与裂果指数之间达到显著的负相关。果核性状与裂果性状均无显著相关性,裂果率和裂果指数之间达到了极显著的正相关。3)利用主成分分析方法确定了4个主成分,累计贡献率可达94.79%,即这4个主成分保存了原始性状94.79%的遗传信息。9个表型中果实纵径、裂果指数、果核指数和果形指数是造成枣核心种质表型多样性的主要因素。
To specify the phenotypic diversity and variation characteristics of a core collection of jujube（ Ziziphus jujuba）,authenticate the correlation between fruit（ stone） characters and dehiscent characters and then improve the utilization efficiency of jujube germplasm resources,9 phenotypic characters of a core collection of jujube were measured and their statistic analysis was implemented in this study. The results showed that： 1） the core collection presented higher level of phenotypic diversity,the variable coefficients of all phenotypic characters were larger than 20% with mean value of 39. 00%,and the Shannon-Wiener index ranged from 1. 49 to 1. 93 with mean value of 1. 77; 2） Different levels of correlation were observed among 9 phenotypic characters,in which multiple characters showed significant correlation（ positive or negative correlation） among fruit（ stone） characters, and fruit transverse diameter showed significant positive correlation with dehiscent rate,fruit shape index showed significant negative correlation with dehiscent index,no significant correlation was found between stone characters and dehiscent characters, and dehiscent rate and dehiscent index showed significantly positive correlation; 3） Four principle components were determined based on the principle component analysis of 9phenotypic characters and the cumulative contribution rate was 94. 79%,which indicated that 94. 79% of initial genetic information was included. The stone vertical diameter,dehiscent fruit index,stone shape index and fruit shape index were the four principal factors of phenotypic diversity in a core collection of jujube.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2017年第6期78-84,共7页
Journal of Beijing Forestry University
基金
国家自然科学基金项目(31400578)
"十二五"国家科技支撑计划项目(2013BAD14B03)
关键词
枣
核心种质
表型多样性
裂果
相关性
jujube
core collection
phenotypic diversity
fruit dehiscent
correlation
