title: Development and Characterization of 1,906 EST-SSR Markers from Unigenes in Jute (Corchorus spp.).
abstract: Jute, comprising white and dark jute, is the second important natural fiber crop after cotton worldwide. However, the lack of expressed sequence tag-derived simple sequence repeat (EST-SSR) markers has resulted in a large gap in the improvement of jute. Previously, de novo 48,914 unigenes from white jute were assembled. In this study, 1,906 EST-SSRs were identified from these assembled uingenes. Among these markers, di-, tri- and tetra-nucleotide repeat types were the abundant types (12.0%, 56.9% and 21.6% respectively). The AG-rich or GA-rich nucleotide repeats were the predominant. Subsequently, a sample of 116 SSRs, located in genes encoding transcription factors and cellulose synthases, were selected to survey polymorphisms among12 diverse jute accessions. Of these, 83.6% successfully amplified at least one fragment and detected polymorphism among the 12diverse genotypes, indicating that the newly developed SSRs are of good quality. Furthermore, the genetic similarity coefficients of all the 12 accessions were evaluated using 97 polymorphic SSRs. The cluster analysis divided the jute accessions into two main groups with genetic similarity coefficient of 0.61. These EST-SSR markers not only enrich molecular markers of jute genome, but also facilitate genetic and genomic researches in jute.
authors.affiliation: Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, China.
authors.forename: Liwu
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, China.
authors.forename: Yanru
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, China.
authors.forename: Aifen
authors.initials: A
authors.lastname: Tao
authors.affiliation: Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, China.
authors.forename: Pingping
authors.initials: P
authors.lastname: Fang
authors.affiliation: Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, China.
authors.forename: Jianmin
authors.initials: J
authors.lastname: Qi
mesh_terms: D016000:Cluster Analysis; D019295:Computational Biology / Q000379:methods; D032381:Corchorus / Q000235:genetics*; D018744:DNA, Plant; D030561:Databases, Nucleic Acid; D020224:Expressed Sequence Tags; D005819:Genetic Markers; D014644:Genetic Variation; D018895:Microsatellite Repeats; D058977:Molecular Sequence Annotation; D011110:Polymorphism, Genetic
chemical_list: D018744:DNA, Plant; D005819:Genetic Markers