Duplications Complicate Genetic Mapping of Rf4, a Restorer Gene for cms‐C Cytoplasmic Male Sterility in Corn
- 1 September 1991
- journal article
- Published by Wiley in Crop Science
- Vol. 31 (5) , 1263-1266
- https://doi.org/10.2135/cropsci1991.0011183x003100050036x
Abstract
Previous studies of the genetics of fertility restoration for C‐type cytoplasmic male sterility (cms‐C) in corn (Zea mays L.) have produced conflicting results. The objective of this study was to localize the restorer gene(s) for cms‐C using restriction fragment length polymorphism (RFLP) analysis. Rf4, a single dominant restorer gene for cms‐C found in inbred A619, was localized to Chromosome 8, ≈2 centimorgans from an RFLP marker locus, NPI114A. The presence in corn of extensive nucleotide duplication complicated the analysis. Because the region of Chromosome 8 near Rf4 is duplicated on Chromosome 3, an additional restorer gene for cms‐C may eventually be found on Chromosome 3.Keywords
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