University of California

Genetic male sterility in wheat (Triticum aestivum L.): Reproductive characteristics and possible use in hybrid wheat breeding


Chao-Chien Jan
C. O. Qualset

Authors Affiliations

Chao-Chien Jan was Postgraduate Research Agronomist, Department of Agronomy and Range Science, Davis; C. O. Qualset was Professor of Agronomy, and Agronomist, Department of Agronomy and Range Science, Davis.

Publication Information

Hilgardia 45(6):153-171. DOI:10.3733/hilg.v45n06p153. September 1977.

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UC9109-9 is a genetic male-sterile wheat (Triticum aestivum L.) that was isolated at Davis from the cross of two fertile wheat varieties, D6301 and Ramona 50. The male-sterile plants were typical of genetic and cytoplasmic male-steriles, except that in a low proportion of the florets, the anthers were transformed to pistil-like structures. The pistilloid anthers were not fertile. UC9109-9 can be maintained by self-pollination, which occurs in about 5 percent of the florets. All progeny from selfed seeds were male-sterile. Aneuploidy was observed in populations derived from UC9109-9, but it was unrelated to male sterility. All F1 plants were fertile when UC9109-9 was used as a female parent in crosses with eight fertile varieties. A low yield (about 30 percent of normal) of hybrid seeds was obtained in small-scale hybrid seed production trials, but improvements in seed production can be expected from manipulating growing conditions in the seed production field, or presumably by genetic improvement of the outcrossing mechanism in wheat.

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Jan C, Qualset C. 1977. Genetic male sterility in wheat (Triticum aestivum L.): Reproductive characteristics and possible use in hybrid wheat breeding. Hilgardia 45(6):153-171. DOI:10.3733/hilg.v45n06p153
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