Development of simple sequence repeats (SSR) markers of ramie and comparison of SSR and inter-SSR marker systems
文献类型: 外文期刊
第一作者: Zhou, JL
作者: Zhou, JL;Jie, YC;Jiang, YB;Zhong, YL;Liu, YH;Zhang, J
作者机构:
关键词: ramie (Boehmeria nivea L. Gaud);simple sequence repeats;inter-simple sequence repeats
期刊名称:PROGRESS IN NATURAL SCIENCE ( 影响因子:3.607; 五年影响因子:4.795 )
ISSN: 1002-0071
年卷期: 2005 年 15 卷 2 期
页码:
收录情况: SCI
摘要: Ramie (Boehmeria nivea L.) is an important bast fiber crop. To study genetic background of this species, we isolated and characterized microsatellite markers of ramie. A genomic library containing inserts of rapid amplification of polymorphic DNA (RAPD) fragments was constructed, and screened by PCR amplification using anchored simple sequence repeats as primers. A total of 26 clones were identified as positives, and 13 microsatellite loci were found after sequencing. The polymorphism of these 13 microsatellite loci was examined and the utility of simple sequence repeats (SSR) and inter-SSR (ISSR) marker systems for genetic characterization compared using 19 selected ramie cultivars. Both approaches successfully discriminated the 19 cultivars which differed in the amount of polymorphism detected. The level of polymorphism detected by SSR was 95.0 %, higher than that by ISSR (72.3 %), but the average polymorphism information content (PIC) of ISSR (0.651) was higher than that of SSR (0.441). The higher PIC value of ISSR suggests that ISSR is more efficient for fingerprinting ramie cultivars than SSR markers. However, because the SSR loci are codominant, they are more suitable for determining the homozygosity levels of ramie, constructing linkage map, quantitative trait loci study of complex traits and marker-assisted selection.
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