Dekalb Genetics Corporation

T Michael Spencer

Albert P Kausch

Catherine J Mackey

Nancy G Willetts

Peggy G Lemaux

Thomas R Adams

William J Gordon-Kamm

James V O'Brien

Richard J Daines

Sheryl A Chambers

Thomas B Rice

William G Start

Mary L Mangano

David A Walters

Michael T Mann

James R Larkins

Paul S Chomet

Brenda A Lowe

Paul C Anderson

Ronald C Lundquist

Alan L Kriz

William L Petersen

David D Songstad

Peter M Orr

Lucille B Laccetti

Michael A Stephens

Rita Mumm

Emil M Orozco

Donald S Walters

Christopher E Flick

Kimberly Glassman

May L Mangano

Clayton S Vetsch

Susan J Zachwieja

Hongyi Zhang

This invention relates to a reproducible system for the production of stable, genetically transformed maize cells, and to methods of selecting cells that have been transformed. One method of selection disclosed employs thebar gene introduced by microprojectile bombardment into embryogenic maize cells which were grown in suspension cultures, followed by exposure to the herbicide bialaphos. The methods of achieving stable transformation disclosed herein include tissue culture methods and media, methods for the bombardment of recipient cells with the desired transforming DNA, and methods of growing fertile plants from the transformed cells. This invention also relates to the transformed cells and seeds and to the fertile plants grown from the transformed cells and to their pollen.

Methods and compositions for the production of stably transformed, fertile monocot plants and cells thereof

According to the invention, there is provided an inbred corn plant designated LIZL5. This invention thus relates to the plants, seeds and tissue cultures of the inbred corn plant LIZL5, and to methods for producing a corn plant produced by crossing the inbred corn plant LIZL5 with itself or with another corn plant, such as another inbred. This invention further relates to corn seeds and plants produced by crossing the inbred plant LIZL5 with another corn plant, such as another inbred, and to crosses with related species. This invention further relates to the inbred and hybrid genetic complements of the inbred corn plant LIZL5, and also to the SSR and genetic isozyme typing profiles of inbred corn plant LIZL5. This invention further relates to methods of transforming the inbred LIZL5 and cells thereof, transformed plants produced by these methods, progeny transgenic plants, and seed derived therefrom.

Transformable inbred corn line LIZL5 and methods for use thereof

The present invention provides methods for increasing yield in plants by introducing a gene encoding phosphinothricin acetyltransferase. The invention further involves a method of transferring said increased yield phenotype to other lines of plants by crossing. A maize transformant is identified in which the phosphinothricin acetyltransferase gene integration event is correlated with increased yield.

Fertile transgenic maize plants containing a gene encoding the pat protein

The present invention provides methods and compositions for the identification of transgenic seeds. This is accomplished by use of screenable markers linked to aleurone-specific promoters. The screenable markers can be provided as gene fusions with selectable markers, allowing both selection and screening of transformants. The use of aleurone-specific promoters, which also direct expression in embryogenic tissues, allows efficient selection of transgenic cells and the screening of viable transgenic seeds, while avoiding the deleterious effects associated with constitutive expression of screenable marker genes. Screening of transgenic seeds avoids the need for growing and assaying of seeds for transgenes and allows implementation of automated seed screening techniques for the identification of transgenic seeds.

Methods and compositions for transgene identification

The present invention provides methods for the efficient production of transformants with low transgene copy numbers. In the method, the average transgene copy number of transformants is decreased through methods which are believed to limit the interaction between segments of transforming DNA prior to transformation. The methods comprise means for end-modification of transforming DNA and use of limited quantities of DNA for transforrnation. Production of single or low copy transformation events is desirable in that it avoids many of the problems associated with high transgene copy number including co-suppression, unpredictable gene expression and non-Mendelian inheritance.

Method for reduction of transgene copy number

This invention relates to a reproducible system for the production of stable, genetically transformed maize cells, and to methods of selecting cells that have been transformed. One method of selection disclosed employs the Streptomyces bar gene introduced by microprojectile bombardment into embryogenic maize cells which were grown in suspension cultures, followed by exposure to the herbicide bialaphos. The methods of achieving stables transformation disclosed herein include tissue culture methods and media, methods for the bombardment of recipient cells with the desired transforming DNA, and methods of growing fertile plants from the transformed cells. This invention also relates to the transformed cells and seeds and to the fertile plants grown from the transformed cells and to their pollen.

Methods and compositions for the production of stably transformed,

This invention relates to stable and genetically transformed cereal plants, other than maize or rice, that comprise an exogenous DNA expressing phosphinothricin acetyl transferase to impart resistance to phosphinothricin in said cereal plants. Cereal plants within the scope of the invention include, but are not limited to, wheat, barley and oats. The invention also pertains to transgenic cereal plants which further comprise screenable markers and transgenic seed obtained from said plants.

Methods and compositions for the production of stably transformed

This invention relates to a method for the production of stable, genetically transformed, Zea mays plants that comprise an exogenous DNA expressing phosphinothricin acetyl transferase to impart resistance to phosphinothricin in said plants. The method further comprises transforming said Zea mays plants with a second gene and further still wherein said second gene imparts insect resistance, such as the expression of a Bacillus thuringiensis toxin gene. The method for achieving stable transformation includes tissue culture methods and media, methods for the bombardment of recipient cells with said DNA's, and methods of regenerating fertile plants from transformed cells. The invention also pertains to a method of breeding said transgenic Zea mays plants with a either a non-transgenic plant or a transgenic plant, and the obtention of fertile transgenic plants and seed therefrom.

This invention relates to a method for the production of stable, genetically transformed cereal plants, other than maize or rice, that comprise an exogenous DNA expressing phosphinothricin acetyl transferase to impart resistance to phosphinothricin in said cereal plants. Cereal plants within the scope of the method include, but are not limited to, wheat, barley and oats. The invention also pertains to a method of breeding said transgenic cereal plants with a either a non-transgenic plant or a transgenic plant, and the obtention of fertile transgenic plants and seed therefrom.

This invention relates to a reproducible system for the production of stable, genetically transformed maize cells, and to methods of selecting cells that have been transformed. One method of selection disclosed employs the Streptomyces bar gene introduced by microprojectile bombardment into embryogenic maize cells which were grown in suspension cultures, followed by exposure to the herbicide bialaphos. The methods of achieving stable transformation disclosed herein include tissue culture methods and media, methods for the bombardment of recipient cells with the desired transforming DNA, and methods of growing fertile plants from the transformed cells. This invention also relates to the transformed cells and seeds and to the fertile plants grown from the transformed cells and to their pollen.

Process of producing fertile transgenic zea mays plants and progeny

Growing community of inventors

Mystic, CT, United States of America

T Michael Spencer