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- W2108085689 abstract "Abstract Background Recently, Jatropha curcas L. has attracted worldwide attention for its potential as a source of biodiesel. However, most DNA markers have demonstrated high levels of genetic similarity among and within jatropha populations around the globe. Despite promising features of copia -type retrotransposons as ideal genetic tools for gene tagging, mutagenesis, and marker-assisted selection, they have not been characterized in the jatropha genome yet. Here, we examined the diversity, evolution, and genome-wide organization of copia -type retrotransposons in the Asian, African, and Mesoamerican accessions of jatropha, then introduced a retrotransposon-based marker for this biofuel crop. Results In total, 157 PCR fragments that were amplified using the degenerate primers for the reverse transcriptase (RT) domain of copia -type retroelements were sequenced and aligned to construct the neighbor-joining tree. Phylogenetic analysis demonstrated that isolated copia RT sequences were classified into ten families, which were then grouped into three lineages. An in-depth study of the jatropha genome for the RT sequences of each family led to the characterization of full consensus sequences of the jatropha copia -type families. Estimated copy numbers of target sequences were largely different among families, as was presence of genes within 5 kb flanking regions for each family. Five copia -type families were as appealing candidates for the development of DNA marker systems. A candidate marker from family Jc7 was particularly capable of detecting genetic variation among different jatropha accessions. Fluorescence in situ hybridization (FISH) to metaphase chromosomes reveals that copia -type retrotransposons are scattered across chromosomes mainly located in the distal part regions. Conclusion This is the first report on genome-wide analysis and the cytogenetic mapping of copia -type retrotransposons of jatropha, leading to the discovery of families bearing high potential as DNA markers. Distinct dynamics of individual copia -type families, feasibility of a retrotransposon-based insertion polymorphism marker system in examining genetic variability, and approaches for the development of breeding strategies in jatropha using copia -type retrotransposons are discussed." @default.
- W2108085689 created "2016-06-24" @default.
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- W2108085689 date "2013-09-10" @default.
- W2108085689 modified "2023-10-08" @default.
- W2108085689 title "Structural characterization of copia-type retrotransposons leads to insights into the marker development in a biofuel crop, Jatropha curcasL." @default.
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- W2108085689 doi "https://doi.org/10.1186/1754-6834-6-129" @default.
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