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Seed Purity Test and Genetic Diversity Evaluation Using RAPD Markers in Radish (Raphanus sativus L.)  

Huh, Man-Kyu (Department of Molecular Biology, Dong-eui University)
Choi, Joo-Soo (Department of Molecular Biology, Dong-eui University)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.54, no.4, 2009 , pp. 346-350 More about this Journal
Abstract
The cultivated radish (Raphanus sativus L.) is a major vegetable crop in the world wide and fast-growing species that grows inhabitats of six continents. It is very important to determine hybrid seed purity in the production of hybrid Brassica vegetable seeds to avoid unacceptable contamination with self-inbred (sib) seeds. The use of random amplified polymorphic DNA (RAPD) markers for evaluating seed purity in $F_2$-hybrid radish cultivars demonstrated. One hundred eighty seeds from the F1 male and female harvest were subsequently screened for seed purity using 13 primers. The 13 primers result in 17 cultivar-specific bands and 23 variable RAPD bands scored for cultivar. RAPD analysis of hybrid seeds from the harvest revealed 128 seeds tested except underdevelopment and decayed seeds were sibs. Especially, $F_2$ hybrids of radish, OPC13, OPD20 were presented clear hybrid bands. It maintains higher than average level of genetic diversity compared with their correspondent parents. RAPD amplification of DNA extracted from germinated individuals from the female harvest reveal that 10 of 208 seeds tested were self-inbred (4.8%). RAPD analysis of hybrid seeds from the male harvest revealed 7 of the 208 seeds tested were sibs (3.4%). The RAPD may lead to a better insight in to the hybrid seed purity.
Keywords
$F_2$-hybrid; radish; seed purity; genetic diversity;
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