Hybrid Wheat seed Production Methods for North Dakota

Miller, J.F. and Lucken, K.A. (1976) Hybrid Wheat seed Production Methods for North Dakota. Crop Science, 16 (2). pp. 217-221.

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In trials at several sites in 1972-4, average yield of hybrid seed when a male fertility restorer and several male-sterile wheat lines were sown in male:female ratios of 1:1, 2:1 or 3:1 in strips 3.1-11 m wide were 1.37, 1.0 and 0.84 t/ha, respectively, or 0.69, 0.67 and 0.64 t/ha when adjusted for the area occupied by the restorer. Decreasing the width of strips to reduce pollen travel distances did not increase yields. Higher yields were obtained by sowing the earlier restorer line 44 growing degree days (growing degree day = average of maximum and minimum temperature - growth threshold temperature in this case 4.4 deg C) before sowing the later male sterile lines than with 0, 22 or 66 growing degree day differences. Hybrid seed yields were highly correlated with restorer yields indicating that hybrid seed production was much more likely to succeed at high than at low yielding sites.

Item Type: Article
Uncontrolled Keywords: Seed production, Cross-pollination, Cytoplasmic male sterility, Growing degree days, Trlticum aestivum L era. Thell.
Author Affiliation: Dep. of Agron., North Dakota State Univ., USA.
Subjects: Crop Improvement
Crop Improvement > Plant Breeding
Divisions: Other Crops
Depositing User: Mr Arbind Seth
Date Deposited: 01 Jan 2013 08:51
Last Modified: 01 Jan 2013 08:51
Official URL: http://dx.doi.org/10.2135/cropsci1976.0011183X0016...
URI: http://eprints.icrisat.ac.in/id/eprint/9244

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