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Published in Crop Sci 6:510-512 (1966)
© 1966 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Effect of Environmental Conditions During the Parent Generation on Seedling Vigor of the Subsequent Seedlings of Oryzopsis miliacea (L.) Benth & Hook1

R. Derwyn, B. Whalley, Cyrus M. McKell and Lisle R. Green2

Application of nitrogen and phosphorus to parent plants of O. miliacea increased the number of seeds produced per plant and the mean seed weight. Both the seedling growth rates and the ultimate seedling lengths in the dark independent of seed weight were increased by the fertilizer application to the parent plants. However, these increases were relatively small compared with the increases associated with seed weight. Water stress applied to the parent plants in pots, decreased the seed yield per plant and increased the mean seed weight. Seedling growth or ultimate seedling length, independent of seed weight, was not affected.

1 Part of a project carried out under a cooperative agreement between the Agronomy Department, University of California, Riverside, and the Pacific Southwest Forest and Range Experiment Station, Forest Service, USDA. Portion submitted by the senior author in partial fulfillment of the requirements for the Ph.D. degree.Paper No. 1734, University of California Citrus Research Center and Agricultural Experiment Station, Riverside, California.

2 Lecturer in Botany, University of New England, Armidale, N.S.W. Australia; Associate Professor of Agronomy, University of California, Riverside; and Range Conservationist (Research), Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Riverside, California, respectively.

Received for publication March 7, 1966.




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