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Genetic Variation and Phenotypic Response of 15 Sweet Corn ( Zea mays L.) Hybrids to Population Density

Author

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  • Adrienne C. Shelton

    (Nelson Institute for Environmental Studies, University of Wisconsin-Madison, Madison, WI 53706, USA
    Department of Agronomy, College of Agricultural and Life Sciences, University of Wisconsin-Madison, Madison, WI 53706, USA)

  • William F. Tracy

    (Nelson Institute for Environmental Studies, University of Wisconsin-Madison, Madison, WI 53706, USA
    Department of Agronomy, College of Agricultural and Life Sciences, University of Wisconsin-Madison, Madison, WI 53706, USA)

Abstract

Planting sweet corn at higher densities may increase the canopy cover, reducing light transmission to the understory and suppressing weed growth. High planting densities can also negatively impact the crop, however, by decreasing ear size and overall yield. The objective of this study was to determine the potential for increased density tolerance of 15 sweet corn hybrids by estimating the general combining ability (GCA) and specific combining ability (SCA) for traits of interest. In 2010 and 2011, a half-diallel of six historic sweet corn inbreds was evaluated in a split-block randomized complete block design in four Wisconsin environments, with four replicates in each environment. Hybrids were planted at a low density of 29,936 plants ha −1 , a medium density of 63,615 plants ha −1 , and a high density of 97,293 plants ha −1 . Significant differences between hybrids were found for phenomorphological traits and ear characteristics. Inbreds C68, C40 and Ia5125 produced the progeny most tolerant of the highest population density. Among these genotypes, tolerance to high density is a heritable trait, indicating the feasibility of breeding sweet corn for density tolerance and potential weed competitiveness.

Suggested Citation

  • Adrienne C. Shelton & William F. Tracy, 2013. "Genetic Variation and Phenotypic Response of 15 Sweet Corn ( Zea mays L.) Hybrids to Population Density," Sustainability, MDPI, vol. 5(6), pages 1-15, June.
    • Handle: RePEc:gam:jsusta:v:5:y:2013:i:6:p:2442-2456:d:26181
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    References listed on IDEAS

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    1. Nemecek, Thomas & Dubois, David & Huguenin-Elie, Olivier & Gaillard, Gérard, 2011. "Life cycle assessment of Swiss farming systems: I. Integrated and organic farming," Agricultural Systems, Elsevier, vol. 104(3), pages 217-232, March.
    2. Jared P. Zystro & Natalia De Leon & William F. Tracy, 2012. "Analysis of Traits Related to Weed Competitiveness in Sweet Corn ( Zea mays L.)," Sustainability, MDPI, vol. 4(4), pages 1-18, March.
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    1. Bosco Justin Shio & Shaomin Guo & Ruifang Zhang & Sikander Khan Tanveer & Jiangbo Hai, 2022. "Diverse Planting Density-Driven Nutrient and Yield Enhancement of Sweet Corn by Zinc and Selenium Foliar Application," Sustainability, MDPI, vol. 14(9), pages 1-16, April.

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