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Genetic variation detected by DNA fingerprinting with a rice minisatellite probe in Oryza sativa L



Genetic variation detected by DNA fingerprinting with a rice minisatellite probe in Oryza sativa L



Tag. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik 91(3): 481-488



A rice minisatellite probe detecting DNA fingerprints was used to assess genetic variation in cultivated rice (Oryza sativa L.). Fifty-seven cultivars of rice, including 40 closely related cultivars released in the US, were studied. Rice DNA fingerprinting revealed high levels of polymorphism among distantly related cultivars. The variability of fingerprinting pattern was reduced in the closely related cultivars. A genetic similarity index (S) was computed based on shared fragments between each pair of cultivars, and genetic distance (D) was used to construct the dendrograms depicting genetic relationships among rice cultivars. Cluster analysis of genetic distance tended to group rice cultivars into different units corresponding with their varietal types and breeding pedigrees. However, by comparison with the coefficients of parentage, the criterion of relatedness based on DNA fingerprints appeared to overestimate the genetic relationships between some of the closely related US cultivars. Although this may reduce the power of fingerprints for genetic analysis, we were able to demonstrate that DNA fingerprinting with minisatellite sequences is simpler and more sensitive than most other types of marker systems in detecting genetic variation in rice.

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Accession: 002626595

Download citation: RISBibTeXText

PMID: 24169839

DOI: 10.1007/bf00222977


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