Campus Units

Botany, Zoology, Agronomy, Plant Pathology and Microbiology

Document Type

Article

Publication Version

Published Version

Publication Date

1999

Journal or Book Title

Advances in Agronomy

Volume

65

First Page

79

Last Page

130

DOI

10.1016/S0065-2113(08)60911-6

Abstract

This chapter reviews the genetics, pathology, and molecular biology of T-cytoplasm male sterility in maize. The chapter discusses the role of cytoplasmic male sterility systems in facilitating the production of hybrid seeds. The effects of widespread planting of T-cytoplasm maize on the severe 1970 epidemic and effect of a mitochondria1 gene on disease susceptibility and male sterility are discussed. It also discusses the involvement of nuclear cytoplasmic interactions in restoration of cms-T, the perspectives of cms-T researchers, and future directions. In cms-T plants, male sterility is associated with premature breakdown of the mitochondria-rich, tapetal cell layer of the anther; this layer is crucial to pollen production because it supplies nutrients to the developing microspores. In many species, cms is associated with the expression of novel open-reading frames in the mitochondrial genome. The studies provided a foundation for further research that resulted in the cloning of the T-urf13 and Rf2 genes from maize and the ChPKSl gene from C. heterostrophus, and the generation of models for the topology of urf13 in the inner mitochondrial membrane, Rfl-mediated processing of T-urfl3 transcripts, and the evolution of toxin biosynthesis in C. heterostrophus and M. zeae-maydis.

Comments

This is a chapter from Advances in Agronomy 65 (1999): 79, doi: 10.1016/S0065-2113(08)60911-6.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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