Molecular Bases of Cytoplasmic Male Sterility in Maize
1979; Elsevier BV; Linguagem: Inglês
10.1016/b978-0-12-620980-8.50010-8
Autores Tópico(s)Plant Genetic and Mutation Studies
ResumoThis chapter discusses the molecular bases of inheritance and expression of cytoplasmic male sterility (CMS) in maize. The cytoplasmic male steriles represent types that contain “mutations” of those cytogenes responsible for the male fertility trait. It is a fact that these cytoplasmic lesions can be corrected by nuclear genes called the Rf loci. This implies the possibility that the same function may be coded in different genomes and that complementation may occur between genetic systems — the nuclear and cytoplasmic. Evidence has been presented that indicates that the factors responsible for the CMS trait are borne on the mitochondrial genome. The large size of the mitochondrial genome and its apparent packaging among several molecules (molecular heterogeneity) gives it a realistic potential for contributing to the fertility trait.
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