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Differences in the inheritance stability of kanamycin resistance between transgenic cucumbers (Cucumis sativus L.) containing two constructs

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Yin Z., Szwacka M., Malinowski R., Malepszy S.
Journal of Applied Genetics
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2004
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vol. 45
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issue 3
307-314
EN
A phenotypic segregation of kanamycin resistance conferred by nosnptII was investigated in two groups of transgenic cucumber lines one containing the PR-2duidA-nosnptII construct and the other with the thaumatinII-nosnptII construct to the third and fifth generation, respectively. Expression of the nptII gene was more stable and predictable in the progeny of the PR-2d lines than that of thaumatin lines. In T2 and T3 generations representing seven PR-2d primary transformants, 78% of the hemizygous progenies exhibited a segregation ratio consistent with Mendelian inheritance; non-Mendelian ratio occurred in the remaining 22%. Mendelian segregation was observed in 46% of the hemizygous progenies derived from 11 thaumatin primary transformants. The segregation ratio for two and three independent loci appeared in single PR-2d and thaumatin lines, respectively.
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