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This article in CS

  1. Vol. 15 No. 3, p. 329-332
    Received: Oct 15, 1974

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Effect of Field Production Techniques on Hybrid Wheat Seed Quality1

  1. J. F. Miller,
  2. K. J. Rogers and
  3. K. A. Lucken2



Seed quality characteristics of hybrid and male-sterile wheat seed [Triticum aestivum L. em. Thell with T. timopheevi (Zhuk.) Zhuk. cytoplasm] were investigated in field-scale production experiments that tested 1:1, 2:1, and 3:1 ratios of female to male parent. Drill-strip widths ranged from 3.1 to 11.0 m. Test weight, seed protein percentage, kernel weight, and seed set percentage were evaluated. Seed harvested from the male-sterile line was lower in test weight, higher in protein percentage and kernel weight, and had a faster rate of germination than seed of the normal line. The 1:1, 2:1, and 3:1 ratios had mean seed set percentages of 64, 51, and 45, respectively. Test weights of male-sterile seed decreased from the 1:1 to the 3:1 ratio, and seed protein percentage increased.

Seed set and quality of sequential seed samples harvested within each of the three female drill-strip widths also were determined. Seed set and test weight decreased, protein percentage increased, and kernel weight decreased toward the center of the male-sterile drill strips within the 2:1 and 3:1 ratios. This decrease in seed quality adversely affected the emergence and subsequent yield of hybrid wheat.

These differences may be a factor determining field arrangements for commercial seed production. If conditions conducive to good production are not present, seed quality as well as seed set percentage may fall below acceptable levels.

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