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This article in CS

  1. Vol. 46 No. 5, p. 2179-2182
     
    Received: Mar 26, 2006


    * Corresponding author(s): maize_resources@ncsu.edu
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doi:10.2135/cropsci2006.02.0111

Increasing Kernel Density for Two Inbred Lines of Maize

  1. Donald L. Thompson and
  2. Major M. Goodman *
  1. Dep. of Crop Science, North Carolina State Univ., Raleigh, NC 27695-7620

Abstract

Improving grain quality of maize (Zea mays L.), including endosperm hardness and density, is often a breeding objective. Dense seed is preferred by dry millers and for alkaline processing, and can command a price premium at market. This study attempted to increase kernel density in a backcrossing program for two inbreds of maize using two selection techniques, specific gravity of kernels and the percentage of sinking kernels in a salt solution (or sinkers). Two inbreds, B73G and A632, were crossed with synthetics exhibiting apparent high kernel density, and several generations of backcrossing and self-pollination followed. Examples of mean comparisons of backcross-derived inbreds with the recurrent parents, B73G and A632 are as follows: B73G–Specific gravity, 1.251 and 1.206; Sinkers, 62.3 and 14.9%; and A632–Specific gravity, 1.266 and 1.250; Sinkers 45.4 and 29.1%. Both the specific gravity and sinkers techniques were successful for increasing kernel density during backcrossing.

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Copyright © 2006. Crop Science Society of AmericaCrop Science Society of America