Summary
Repetitive DNA sequences are useful molecular markers for studying plant genome evolution and species divergence. In this paper, we report the isolation and characterization of four genome-type specific repetitive DNA sequences in the genus Oryza. Sequences specific to the AA, CC, EE or FF genome types are described. These genome-type specific repetitive sequences will be useful in classifying unknown species of wild or domestic rice, and in studying genome evolution at the molecular level. Using an AA genome-specific repetitive DNA sequence (pOs48) as a hybridization probe, considerable differences in its copy number were found among different varieties of Asian-cultivated rice (O. sativa) and other related species within the AA genome type. Thus, the relationship among some of the members of AA genome type can be deduced based on the degree of DNA sequence similarity of this repetitive sequence.
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Communicated by A. L. Kahler
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Zhao, X., Wu, T., Xie, Y. et al. Genome-specific repetitive sequences in the genus Oryza . Theoret. Appl. Genetics 78, 201–209 (1989). https://doi.org/10.1007/BF00288800
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DOI: https://doi.org/10.1007/BF00288800