Abstract: A variety of methods and compostions are provided, including methods and compositions for targeted modification of a specific target site in a cell or organism, methods for integrating polynucleotides of interest, methods to assess promoter activity, directly select transformed organisms, minimize or eliminate expression resulting from random integration into the genome of an organism, such as a plant, remove polynucleotides of interest, combine multiple transfer cassettes, invert or excize a polynucleotide, silence a gene, and identify and/or characterize transcriptional regulating regions. The methods involve the introduction of a cell proliferation factor and a double-strand break-inducing enzyme into an organism.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.

Abstract: Methods of making a targeted modification in a male fertility gene in the genome of a plant are disclosed. The methods involve contacting a plant cell with an engineered double-strand-break-inducing agent capable of inducing a double-strand break in a target sequence in the male fertility gene and identifying a cell comprising an alteration in the target sequence. Also disclosed are plants, plant cells, plant parts, and seeds comprising a male fertility gene with an alteration in a male fertility gene. Nucleic acid molecules comprising male fertility genes with at least one targeted modification therein, optimized nucleic acid molecules encoding endonucleases that are engineered double-strand-break-inducing agents and expression cassettes, host cells, and plants comprising one or more of the nucleic acid molecules are further disclosed.

Abstract: Methods of making a targeted modification in a male fertility gene in the genome of a plant are disclosed. The methods involve contacting a plant cell with an engineered double-strand-break-inducing agent capable of inducing a double-strand break in a target sequence in the male fertility gene and identifying a cell comprising an alteration in the target sequence. Also disclosed are plants, plant cells, plant parts, and seeds comprising a male fertility gene with an alteration in a male fertility gene. Nucleic acid molecules comprising male fertility genes with at least one targeted modification therein, optimized nucleic acid molecules encoding endonucleases that are engineered double-strand-break-inducing agents and expression cassettes, host cells, and plants comprising one or more of the nucleic acid molecules are further disclosed.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.

Abstract: Methods of making a targeted modification in a male fertility gene in the genome of a plant are disclosed. The methods involve contacting a plant cell with an engineered double-strand-break-inducing agent capable of inducing a double-strand break in a target sequence in the male fertility gene and identifying a cell comprising an alteration in the target sequence. Also disclosed are plants, plant cells, plant parts, and seeds comprising a male fertility gene with an alteration in a male fertility gene. Nucleic acid molecules comprising male fertility genes with at least one targeted modification therein, optimized nucleic acid molecules encoding endonucleases that are engineered double-strand-break-inducing agents and expression cassettes, host cells, and plants comprising one or more of the nucleic acid molecules are further disclosed.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.

Abstract: Compositions and methods relating to the use of sulfonylurea-mediated control of gene expression are provided. Compositions include sulfonylurea responsive chemical switches wherein the gene expression is regulated by a sulfonylurea compound. Compositions also include polynucleotides encoding the polypeptides as well as constructs, vectors, prokaryotic and eukaryotic cells, and eukaryotic organisms including plants and seeds comprising the polynucleotide, and/or produced by the methods. Also provided are methods to regulate expression of a polynucleotide of interest in a cell or organism, and methods to modify a genome, including in a plant or plant cell.

Abstract: A variety of methods and compostions are provided, including methods and compositions for targeted modification of a specific target site in a cell or organism, methods for integrating polynucleotides of interest, methods to assess promoter activity, directly select transformed organisms, minimize or eliminate expression resulting from random integration into the genome of an organism, such as a plant, remove polynucleotides of interest, combine multiple transfer cassettes, invert or excise a polynucleotide, silence a gene, and identify and/or characterize transcriptional regulating regions. The methods involve the introduction of a cell proliferation factor and a double-strand break-inducing enzyme into an organism.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.

Abstract: Methods of making a targeted modification in a male fertility gene in the genome of a plant are disclosed. The methods involve contacting a plant cell with an engineered double-strand-break-inducing agent capable of inducing a double-strand break in a target sequence in the male fertility gene and identifying a cell comprising an alteration in the target sequence. Also disclosed are plants, plant cells, plant parts, and seeds comprising a male fertility gene with an alteration in a male fertility gene. Nucleic acid molecules comprising male fertility genes with at least one targeted modification therein, optimized nucleic acid molecules encoding endonucleases that are engineered double-strand-break-inducing agents and expression cassettes, host cells, and plants comprising one or more of the nucleic acid molecules are further disclosed.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.

Abstract: Nucleotide sequences of a Msca1 gene, critical to male fertility in plants are described, with DNA molecule and amino acid sequences set forth. Promoter sequences and their essential regions are also identified. The nucleotide sequences are useful in impacting male fertility in plants.