Polymorphism Analyses of Watermelon (Citrullus lanatus) Mapping Parents Using RAPD and ISSR Molecular Markers
文献类型: 外文期刊
作者: Yang, X. P. 1 ; Liu, G. 2 ; Xu, J. H. 2 ; Gao, C. Z. 2 ; Hou, X. L. 1 ;
作者机构: 1.Nanjing Agr Univ, Natl Key Lab Crop Genet & Germplasm Enhancement, Coll Hort, Nanjing, Jiangsu, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Vegetable Crops, Nanjing, Jiangsu, Peoples R China
关键词: watermelon;RAPD;ISSR;system optimization;polymorphism analyses
期刊名称:IV INTERNATIONAL SYMPOSIUM ON CUCURBITS
ISSN: 0567-7572
年卷期: 2010 年 871 卷
页码:
收录情况: SCI
摘要: Genomic DNA of watermelon was analyzed by optimizing the concentration of Mg2+, dNTPs, and primer in RAPD and ISSR analysis systems. The screened optimization system of RAPD for watermelon genomic DNA was 20 mu l, which contained primer 0.4 mu M L-1, dNTPs 200 mu M L-1, Mg2+ 2.0 mM L-1, DNA 20 ng, 1xbuffer, Taq E 1.0 U. The optimization system of ISSR was 16 mu l, which contained primer 0.25 mu M L-1, dNTPs 160 mu M L-1, Mg2+ 1.0 mM L-1, DNA 20 ng, 1xbuffer, Taq E 0.64 U. RAPD and ISSR were applied in polymorphism analyses of watermelon mapping parents, 64-1 circle times-3 and 6 circle times-2, and 23 circle times-1 and 4-1 circle times-2, which were inbred lines of district variety in China. The results of mapping parents 64-1 circle times-3 and 6 circle times-2 showed that 170 out of 181 RAPD primers generated 525 amplified bands, 55 produced 77 polymorphic bands, and the polymorphism rate was 14.67%; 45 out of 62 ISSR primers generated 188 amplified bands with an average of 4.18 bands per primer. And 15 polymorphic primers produced 23 polymorphic loci. The polymorphism rate of ISSR analyses was 12.23%. In mapping parents 23 circle times-1 and 4-1 circle times-2, 456 out of 499 RAPD primers amplified 1431 bands and 142 polymorphic primers produced 240 polymorphic loci, so the polymorphism rate was 16.77%. These showed that the genetic background of watermelon mapping parents was narrow.
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