The present disclosure provides tobacco inbred plants NC1209-23 SRC, CMS NC1209-23 SRC, DH19 SRC, DH98-325-5 SRC, NC1426-11 SRC, CMS NC1426-11 SRC, and NC1426-17 SRC, and hybrids NC 3 SRC, NC 6 SRC, and NC 4 SRC. The present disclosure also provides parts of such plants, cured tobacco, and tobacco products made from those parts. The present disclosure also includes progenies of the provided plants including hybrids.

An embodiment of the present invention provides a tobacco plant having a low alkaloid content. In the tobacco plant, a function of a gene encoding aspartate oxidase AO2 is suppressed.

The present disclosure provides tobacco inbred plants TN90 SRC, CMS TN90 SRC, KY14 SRC, CMS KY14 SRC, L8 SRC, NC775 SRC, CMS NC775 SRC, NC645 SRC, NC638 SRC, CMS NC638 SRC, TN86 SRC, and CMS TN86 SRC, and hybrids KY14L8 SRC, NC7 SRC, and NCBH129 SRC. The present disclosure also provides parts of such plants and products made from those parts. The present disclosure also includes progeny of the provided plants including hybrids.

The present application provides tobacco inbred plants dS1746, dS1746MS, dS1564 and dS1564MS. The present application also provides parts of such plants and products made from those parts. The present application also includes progeny of the provided plants including hybrids.

The present invention provides a method for modulating the alkaloid content of a plant (e.g. a tobacco plant), the method comprising modifying said plant by modulating the activity or expression of at least one Nic1 ERF gene. The present invention also provides for the use of at least one Nic1 ERF gene for modulating the alkaloid content of a plant, as well as tobacco cells, plants, plant propagation materials, harvested leaves, processed tobaccos, or tobacco products obtainable in accordance with the invention.

The present disclosure provides metabolic signatures and genetic markers for tracking enhanced nitrogen utilization efficiency phenotypes in tobacco plants and for introgressing enhanced nitrogen utilization efficiency phenotypes into tobacco plants. The disclosure also provides tobacco plants comprising enhanced nitrogen utilization efficiency and methods to the creation of tobacco plants comprising enhanced nitrogen utilization efficiency. The disclosure also provides recombinant polynucleotides and polypeptides for enhancing nitrogen utilization efficiency in modified tobacco plants and tobacco plants comprising the provided recombinant polynucleotides and polypeptides.

Provided herein are genetic markers and a coding sequence associated with a low- or ultra-low anatabine trait in tobacco.

This disclosure provides a number of sequences involved in the transport of alkaloids from the root to the leaf in tobacco, methods of using such sequences, tobacco plants carrying modifications to such sequences, and tobacco products made from such plants.

Compositions and methods for reducing the level of nornicotine and N-nitrosonornicotine (NNN) in tobacco plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for a root-specific nicotine demethylases, CYP82E10, and variants thereof, that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Compositions of the invention also include tobacco plants, or plant parts thereof, comprising a mutation in a gene encoding a CYP82E10 nicotine demethylase, wherein the mutation results in reduced expression or function of the CYP82E10 nicotine demethylase. Seed of these tobacco plants, or progeny thereof, and tobacco products prepared from the tobacco plants of the invention, or from plant parts or progeny thereof, are also provided. Methods for reducing the level of nornicotine, or reducing the rate of conversion of nicotine to nornicotine, in a tobacco plant, or plant part thereof are also provided. The methods comprise introducing into the genome of a tobacco plant a mutation within at least one allele of each of at least three nicotine demethylase genes, wherein the mutation reduces expression of the nicotine demethylase gene, and wherein a first of these nicotine demethylase genes encodes a root-specific nicotine demethylase involved in the metabolic conversion of nicotine to nornicotine in a tobacco plant or a plant part thereof. The methods find use in the production of tobacco products that have reduced levels of nornicotine and its carcinogenic metabolite, NNN, and thus reduced carcinogenic potential for individuals consuming these tobacco products or exposed to secondary smoke derived from these products.

Provided is a recombinant nucleic acid construct comprising a sequence of Formula I (SEQ ID NO:48): XN.sub.1N.sub.2N.sub.3N.sub.4N.sub.5N.sub.6N.sub.7N.sub.8N.sub.9N.sub.10N.sub.11Y as an ethylene binding sequence (EBS). Tandems of two or more directly adjoining EBS are also described, and may be included in an expression cassette useful for modulating the expression of a nucleic acid of interest in a plant in response to plant hormone ethylene.