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Published in Crop Sci 7:493-495 (1967)
© 1967 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Monosomic Analysis of Fertility-Restoration in Common Wheat (Triticum aestivum L.)1

L. D. Robertson and B. C. Curtis2

Monosomic analysis of the restoration genes in Triticum timopheevi X Marquis3, a hexaploid fertility-restorer with T. timopheevi cytoplasm known to possess two major dominant genes Rf1Rf1Rf2Rf2, revealed that chromosome 1A carries one of the major genes. Inconclusive data prevented identification of the other chromosome carrying a major gene. Chromosome 3A was not studied.

Chromosomes 1B, 2A, 3D, 6A, and 6B of ‘Chinese Spring’ appear to carry modifier genes which prevent normal expression of restoration when absent, even though Rf1 and Rf2 genes are present.

Key Words: cytoplasmic male-sterility • hybrid wheat • chromosome • gamete transmission frequency • hexaploid wheat

1 Contribution from teh Agronomy Department of Colorado State University, Fort Collins. Colorado Agricultural Experiment Station Scientific Series No. 1191.

2 Formerly Graduate Fellow (now Manager, Hybrid Wheat Research, Funk Bros. Seed Co., Bloomington, Ill.), and Professor of Agronomy, Colorado State University, Fort Collins.

Received for publication March 11, 1967.




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