Repetitive DNA Sequences in Wheat and Its Relatives |
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Authors: | ZHANG Xue-yong Li Da-Yong |
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Affiliation: | 1. ICGR of Chinese Academy of Agricultural Sciences, Key Laboratory of Crop Germplasm Resources & Biotechnology,Ministry of Agoriculture, Beijing 100081 2. College of Life Science, Beijing University, Beiing 100871 |
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Abstract: | Repetitive DNA sequences form a large portion of eukaryote genomes. Using wheat ( Triticum )as a model, the classification, features and functions of repetitive DNA sequences in the Tritieeae grass tribe is reviewed as well as the role of these sequences in genome differentiation, control and regulation of homologous chromosome synapsis and pairing. Transposable elements, as an important portion of dispersed repetitives,may play an essential role in gene mutation of the host. Dynamic models for change of copy number and sequences of the repetitive family are also presented after the models of Charlesworth et al. Application of repetitive DNA sequences in the study of evolution, chromosome fingerprinting and marker assisted gene transfer and breeding are described by taking wheat as an example. |
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Keywords: | Wheat Genome Repetitive DNA sequence Evolution Chromosome fingerprint Marker-assisted breeding |
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