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Published in Crop Sci 13:92-95 (1973)
© 1973 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Pollen Production of Fertility Restored Lines of Soft Red Winter Wheats1

J. W. Johnson and F. L. Patterson2

Pollen production and seed set were compared for cultivars and derived homozygous pollinator "R" lines with cytoplasm and genetic restorers from Triticum timopheevi. Pollen production and anther extrusion were determined in the laboratory on excised spikes from greenhouse and field-grown plants. Some restored "R" lines were as good as their parent cultivars for pollen dispersal. In diverse controlled environments restored "R" lines were somewhat more sensitive to temperature and photoperiod than were normal cultivars. Apparently "R" lines developed with T. timopheevi cytoplasm will be satisfactory for most environments.

Key Words: Hybrid wheat • Triticum aestivum L

1 Contribution from the Purdue University Agricultural Station, Lafayette, Ind. 47907. Part of a thesis submitted by the senior author in partial fulfillment of the requirements for the M.S. degree at Purdue University. Journal Paper No. 4800.

2 Graduate Research Assistant and Professor, Department of Agronomy, respectively.

Received for publication August 5, 1972.




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