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小果油茶种实表型性状遗传多样性研究
黄勇,姚小华,王开良,任华东,李志真,谢一青
0
(中国林业科学研究院亚热林业研究所,富阳 311400; 福建省林业科学研究院,福州 350012)
摘要:
分析了小果油茶全分布区的18个地理群体进行种实表型性状遗传多样性。结果表明,小果油茶种实表型性状变异相当丰富,小果油茶18个群体10个种实表型性状的平均变异系数高达24.7%,平均相对极差也达到48.2%,种实表型性状在群体间及内差异极显著。巢式方差分析结果表明:总体上小果油茶群体间多样性程度略大于群体内的多样性,其中性状TfLs/WsLfWssLs 在群体间变异明显大于群体内的变异,WfRs在群体间与群体内变异大小相当,群体间略大于群体内,而NsLf/Wf则是群体内变异明显大于群体间变异,主要以群体内变异为主。种实聚类分析结果表明,小果油茶呈现较明显的地理区域特征,在欧氏平均距离4.22的阀值处可将划分为3个大类。相关性分析得知小果油茶表观性状没有随经纬度变化而呈现出较明显的地带性演变规律,但通过进一步的地理趋势面分析得知,Rs Ls/WsWs与经纬度的拟合度及拟合效果均达到较好的水平,呈现出较明显的地带性分布规律。
关键词:  小果油茶  种实表观性状  趋势面分析  遗传多样性
DOI:CNKI:34-1162/S.20110829.1430.010
基金项目:“十一五”国家科技支撑计划项目(2009BADB1B01, 2009BADA8B04), 中国林科院公益性科研基金专项(CAFYBB2008005), 中国林科院亚林所公益性科研基金专项(RISF6804), 福建省自然科学基金项目(2010J01088), 福建省林木种苗科技攻关油茶良种选育扩繁推广和加工利用, 福建省科技厅公益项目(2009R10008-5), 国家林业局南方山地用材林培育重点实验室及福建省森林培育与林产品加工利用重点实验 室项目共同资助。
Genetic diversities of phenotypical traits of fruit and seed in Camellia meiocarpa Hu.
HUANG Yong,YAO Xiao-hua,WANG Kai-liang,REN Hua-dong,LI Zhi-zheng,XIE Yi-qing
(Research Institute of Subtropical Forestry, CAF, Fuyang 311400; Fujian Academy of Forestry, Fuzhou 350012)
Abstract:
Genetic diversities of fruit and seed were analyzed in the full distribution area of C. meiocarpa Hu with 18 geographic populations. The results showed as follows. The variation of seed phenotypic trait of C. meiocarpa Hu was quite rich. The average coefficient of 10 phenotypic traits could reach 24.7% in 18 geographic populations; the mean R was 48.2%, and there existed significant differences in seed phenotypic traits of inter-populations and intra-populations. The result of nested variance analysis showed that the diversity of inter-populations was higher than that of intra-populations appreciably; for the traits of Tf, Ls/Ws, Lf, Wss and Ls, the diversity of inter-populations was higher than that of intra-populations obviously, but Ns and Lf/Wf were on the contrary; the diversities of Wf and Rs were nearly equivalent no matter of inter-populations and intra-populations. According to the cluster analysis, Camellia meiocarpa Hu had obvious geography regional characteristics, and the 18 populations could be divided into three groups obviously at euclidean distance (4.22). The correlation analysis showed that there was not obvious regional evolutionary law with the change of longitude and latitude in fruit and seed phenotypic traits, however, Rs, Ls/Ws and Ws showed evident regional evolutionary law according to geographic trend surface analysis, and the fitting effects were good.
Key words:  Camellia meiocarpa Hu.  phenotypic traits of fruit and seed  trend surface analysis  genetic diversity

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