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Mass selection for improved cold and density tolerance of two maize populations

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Summary

Data of planting and plant density are two cultural practices influencing grain yield of maize (Zea mays L.). Our study was designed to evaluate the usefulness of a mass selection scheme to improve cold and density tolerance of the BS2 and BS3 maize populations. Populations were planted at an early planting date and a high plant density, and three cycles of mass selection for well-filled ears on erect plants were conducted at earch of three Corn Belt locations (i.e., Waseca, MN; Ames, IA; Portageville, MO).

Results showed that selection improved cold tolerance traits of BS3, but not of BS2. Mass selection did not increase density tolerance of either population at any location. Selection did not improve response to planting dates, although the early planting date did improve agronomic performance and grain yield of all entries. We concluded that mass selection at high plant densities and early planting dates at diverse geographical locations did not produce cycles adapted to specific environmental conditions.

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Author notes

  1. P. R. Mosely

    Present address: Illinois Foundation Seeds, Inc., 61820, Champaign, Il., USA

  2. T. M. Crosble

    Present address: Garst Seed Company, 50010, Ames, Iowa, USA

  3. J. J. Mock

    Present address: Northrup King Company, 55081, Stanton, MN, USA

Authors and Affiliations

  1. Department of Agronomy, Iowa State University, 50010, Ames, Iowa, USA

    P. R. Mosely, T. M. Crosble & J. J. Mock

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  1. P. R. Mosely
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  2. T. M. Crosble
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  3. J. J. Mock
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Mosely, P.R., Crosble, T.M. & Mock, J.J. Mass selection for improved cold and density tolerance of two maize populations. Euphytica 33, 263–269 (1984). https://doi.org/10.1007/BF00022775

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  • DOI: https://doi.org/10.1007/BF00022775

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