51个木麻黄无性系遗传多样性的ISSR分析
Analysis of Genetic Diversity and Relationship Among 51 Casuarina Superior Clones by Using ISSR Markers
-
摘要: 采用ISSR分子标记对51个木麻黄无性系进行遗传多样性和亲缘关系分析。结果表明:ISSR适用于木麻黄无性系遗传分析,22个ISSR引物在供试无性系中共扩增出199个位点,多态性位点154个,多态位点百分率为77.4%;平均有效等位基因数为1.5,Nei's基因多样性指数为0.174 1~0.389 1,Shannon信息指数为0.273 2~0.556 0,相似系数为0.467 3 ~0.995 0,平均为0.743 0,表明供试无性系的遗传基础已相对比较狭窄。ISSR聚类分析表明:参试无性系并不能按来源地各自单独聚为1类,无性系亲缘关系的远近与来源相关不大;在相似系数为0.678时,可将所有供试材料分为2大类群;亲缘关系树状图在分子水平上显示了供试无性系间的亲缘关系,为今后木麻黄无性系的推广应用及育种亲本的选配提供了理论依据。Abstract: Casuarinas are important for coastal protection purpose in China. In recent years, many Casuarinas clones have been developed. The knowledge on genetic diversity and relationship of these clones is critical to guide Casuarinas breeding, but still limited. In this study, twenty-two selected ISSR primers were used to amplify the tested clones. A total of 199 bands were obtained in which 154 bands (77.4%) were polymorphic. The average effective number of alleles was 1.5. The Nei's gene diversity indices (H) ranged from 0.174 1 to 0.389 1 and the Shannon's information index (I) ranged from 0.273 2 to 0.556 0. The genetic similarity coefficients among the tested clones ranged from 0.467 3 to 0.995 0, with an average of 0.743 0. The results showed that the genetic differences among the 51 clones were relatively little. The cluster analysis based on ISSR markers revealed that the 51 clones could not be cluster according to their origin and there were no correlation between genetic relationship and geographical origin. The 51 clones of Casuarinas could be divided into 2 groups when the similarity coefficient was 0.678. The genetic relationship of all the 51 clones revealed by the ISSR dendrogram would be of great help for genotype screening in afforestation project and parental selection in Casuarinas breeding.
-
Key words:
- Casuarina
- / clone
- / ISSR
- / genetic diversity
-
[1] Midgley S J,Turnbul L,Johnston R D. Casuarina Ecology [M]. Canberra:CSIRO,Management and Utilization, 1983 [2] 仲崇禄, 白嘉雨. 山地木麻黄家系遗传参数估算与家系选择[J]. 林业科学研究, 1998, 11(4): 361-369 [3] 林什全, 仲崇禄, 白嘉雨. 广东省电白县5年生山地木麻黄种源试验及评选[J]. 林业科学研究, 2003, 16(4): 506-510 [4] 王明怀, 陈建新, 殷祚云, 等. 五种木麻黄的种源引种初报[J]. 林业科学研究, 2002, 15(6): 751-755 [5] 仲崇禄, 施纯淦, 王维辉, 等. 华南地区短枝木麻黄种源试验[J]. 林业科学研究, 2001, 14(4): 408-415 [6] 叶功富, 玛泽幸, 潘惠忠, 等. 木麻黄国际种源苗期生长及抗盐性试验[J]. 福建林学院学报, 1995, 15(4): 301-306 [7] Moran G F, Bell J C, Turnbull J W. A cline in genetic diversity in river She-oak Casuarina cunninghamiana [J]. Aust Bot, 1989, 37(2):169-180 [8] Yasodha R, Kathirvel M, Sumathi R, et al. Genetic analyses of Casuarinas Using ISSR and FISSR markers[J]. Genetica, 2004, 122 (2):161-172 [9] 郭启荣, 林益明, 周涵滔, 等. 4种木麻黄亲缘关系的RAPD分析[J]. 厦门大学学报:自然科学版, 2003, 42(3): 378-383 [10] 叶功富, 罗美娟, 林益明, 等. 短枝木麻黄地理种源遗传多样性的RAPD分析[J]. 厦门大学学报:自然科学版, 2005, 44(6):856-860 [11] 罗美娟, 叶功富, 卢昌义. 短枝木麻黄群体的遗传分化和遗传结构[J]. 福建林学院学报, 2007, 27(4): 343-348 [12] 黄桂华. 短枝木麻黄种质资源遗传多样性的AFLP分析. 北京: 中国林业科学研究院林业研究所, 2006 [13] SU Y J,WANG T,YANG W D,et al.DNA extraction and RAPD analysis of Podocarpus [J].Acta Scientiarum Naturalium Universitatis Sunyatseni, 1998, 37(4): 13-18 [14] 姜 静, 杨传平, 刘桂丰, 等. 利用RAPD标记技术对桦树种间亲缘关系的分析[J]. 林业科学, 2002, 38(1): 154-156 [15] Nei M.Analysis of gene diversity in subdivided populations[J].Proc Natl Acad Sci USA, 1973 (70): 3321-3323 [16] 段昌群. 生态科学进展:第一卷[M].北京: 高等教育出版社, 2004 [17] Andrea D W, Xiang Q Y, Kephart S R. Assessing hybridization in natural population of Penstemon (Scrophulariaceae) Using hypervariable Inter-simple sequence repeat (ISSR) bands [J]. Molecular Ecology, 1998, 7 (9): 1107-1125 [18] 王永清, 付 燕, 杨 芩, 等. 枇杷属植物遗传多样性的ISSR分析[J]. 林业科学, 2010, 46(4):49-57 [19] 倪 穗, 李纪元, 王 强. 20个茶花品种遗传关系的ISSR分析[J]. 林业科学研究, 2009, 22(5):623-629 [20] 姚明哲, 陈 亮, 王新超, 等. 我国茶树无性系品种遗传多样性和亲缘关系的ISSR分析[J]. 作物学报, 2007, 33(4): 598-604 [21] 谢金链, 许秀玉, 王明怀, 等. 木麻黄无性系造林对比试验[J].广东林业科技, 2010,26(2): 30-35
计量
- 文章访问数: 3253
- HTML全文浏览量: 172
- PDF下载量: 1470
- 被引次数: 0