High threonine producing lines of Nicotiana tobacum and...

Multicellular living organisms and unmodified parts thereof and – Plant – seedling – plant seed – or plant part – per se – Higher plant – seedling – plant seed – or plant part

Reexamination Certificate

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C800S260000, C800S266000, C800S268000, C800S270000, C800S298000

Reexamination Certificate

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10463449

ABSTRACT:
The present invention provides a method for producing plants with a desired phenotypic trait which comprises subjecting plants to mutagenesis, screening chimeric progeny for plants having the desired phenotypic trait, and propagating the survivors. In an embodiment, the phenotypic trait comprises an altered amino acid content. Preferably, the technique is used to generateNicotiana tobacumplant lines having an increase in at least one amino acid. In a preferred embodiment, the invention provides improvedNicotiana tobacumplant lines producing at least 1.35 nmole of threonine per milligram of dry plant weight. These plants are useful for improving the flavor and aroma of the tobacco.

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