| 2代种子园红锥生长和形质性状遗传变异分析 |
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| 引用本文： | 杨会肖,廖焕琴,杨晓慧,张卫华,潘文.2代种子园红锥生长和形质性状遗传变异分析[J].华南农业大学学报,2017,38(5):81-85. |
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| 作者姓名： | 杨会肖 廖焕琴 杨晓慧 张卫华 潘文 |
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| 作者单位： | 广东省森林培育与保护利用重点实验室/广东省林业科学研究院,广东广州,510520 |
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| 基金项目： | 广东省科技计划项目（2014B020202002，2016B070701008）；广东省科技创新专项（2014KJCX003） |
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| 摘 要： | 【目的】有效评价和利用红锥Castanopsis hystrix 2代种子园资源、挖掘其优良性状。【方法】对广东省龙眼洞林场2代种子园内56个红锥无性系生长和形质性状进行调查,分析各性状的变异系数、不同性状间的相关关系,并进行主成分分析和聚类分析。【结果】56个红锥无性系的10个生长和形质性状的变异系数介于11%~47%,平均变异系数为28.2%。树高与胸径、冠幅与树高、胸径间呈极显著正相关,胸径与分枝数、分枝大小与叶片疏密间也存在极显著正相关,冠幅与分枝角度、尖削度与分枝大小存在显著的负相关。10个性状可以综合为3个主成分,前3个主成分累计贡献率达85%。根据系统聚类将56个红锥无性系划分为4个组。【结论】不同红锥无性系的生长性状和形质性状间变异系数较大,遗传多样性较丰富,且性状间存在不同程度的相关性,为开展红锥种内杂交育种的亲本选择奠定基础。
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| 关 键 词： | 红锥 生长性状 形质性状 重复力 遗传相关 主成分分析 聚类分析 |
| 收稿时间： | 2016/12/12 0:00:00 |
Genetic variation analysis of growth and form traits of Castanopsis hystrix in the second generation seed orchard |
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| YANG Huixiao,LIAO Huanqin,YANG Xiaohui,ZHANG Weihua and PAN Wen.Genetic variation analysis of growth and form traits of Castanopsis hystrix in the second generation seed orchard[J].Journal of South China Agricultural University,2017,38(5):81-85. |
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| Authors: | YANG Huixiao LIAO Huanqin YANG Xiaohui ZHANG Weihua and PAN Wen |
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| Institution: | Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou 510520, China,Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou 510520, China,Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou 510520, China,Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou 510520, China and Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization/Guangdong Academy of Forestry, Guangzhou 510520, China |
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| Abstract: | Objective] To evaluate and utilize the resources in the second generation seed orchard of Castanopsis hystrix, and develop elite genotypes with genetic merit.Method] We investigated the growth and form traits of 56C. hystrix clones in the second generation seed orchard at Longyandong forest farm, Guangdong Province. The variation coefficients and correlations of different traits were analyzed. Principal component analysis and cluster analysis were performed.Result] The variation coefficients of ten growth and form traits of 56 C. hystrix clones ranged from 11% to 47%, and the average was 28.2%. Height and diameter at breast height, crown width and height, crown width and diameter at breast height, diameter at breast height and branch number, branch size and leaf density all had significant positive correlations(P<0.01). Crown width and branch angle, taper degree and branch size had significant negative correlations(P<0.05). Principal component analysis indicated that ten traits could be explained by the first three principal components, accounting for 85% of cumulative proportion of variations. Based on hierarchical cluster analysis, 56 clones were divided into four groups.Conclusion] Growth and form traits among C. hystrix clones had extensive variation with rich genetic diversity. Different degrees of correlations are found among traits. This study provides a basis for parent selection in breeding intraspecific hybrid of C. hystrix. |
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| Keywords: | Castanopsis hystrix growth trait form trait repeatability genetic correlation principal component analysis cluster analysis |
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