Submitted to: Book Chapter
Publication Type: Book / Chapter
Publication Acceptance Date: 5/10/2005
Publication Date: N/A
Interpretive Summary: Maize x Tripsacum hybridization is historically among one of the most interesting forms of intergeneric hybridization. Several decades have passed since a thorough review of both historical and recent research advances relevant to this field of study has been published. As a consequence, an informative and useful review of maize-Tripsacum intergeneric hybridization is warranted for both students and professional investigators interested in this area of research. This review provides both historic and recent methods pertaining to the various pathways for potentially introgressing Tripsacum genes into maize as well as addressing and discussing opposing views relative to the genetic mechanisms of apomixis and its transfer from Tripsacum to maize. The review also provides historical and recent research directed at dissecting the Tripsacum genome for future gene introgression studies. The contents of this review provides both students and researchers fundamental and advanced information regarding methods of maize-Tripsacum hybridization, results of the intergeneric hybridiztion and opportunities for research programs interested in utilizing the diverse genome of Tripsacum for breeding improved cultivars of maize.
Technical Abstract: For more than 20 years, a concise review of experiments involving the hybridization of corn and its most distant relative, Tripsacum (eastern gamagrass), has not been available. Consequently, this review was developed to place both historic and recent research achievements into a single document for use as a teaching tool to students in plant breeding courses as well as a reference resource for more advanced researchers interested in this area of study. The review provides both general and specific information pertaining to the classic methods of hybridization and anticipated results of such hybridization. Alternative approaches for investigating these products of intergeneric hybridization and their potential use in maize breeding are also provided. The review provides an up to date discussion of recent research focused upon obtaining an understanding of the mechanisms associated with expression, inheritance and transmission of apomixis in Tripsacum and its potential transfer to maize. Potential pitfalls in apomictic transfer and areas requiring further research are also discussed.