My Account: Log In | Join | Renew
Search
Author
Title
Vol.
Issue
Year
1st Page

Abstract

 

This article in CS

  1. Vol. 17 No. 3, p. 421-425
     
    Received: Aug 21, 1975
    Published: May, 1977


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2135/cropsci1977.0011183X001700030020x

Interrelations among Protein, Lysine, Oil, Certain Mineral Element Concentrations, and Physical Kernel Characteristics in Two Maize Populations1

  1. J. M. Arnold,
  2. L. F. Bauman and
  3. H. S. Aycock2

Abstract

Abstract

The interrelationships among whole kernel protein, lysine, oil, P, K, Mg, Fe, and Zn concentrations and physical kernel characteristics were determined in a heterozygous opaque-2 population and a homozygous opaque-2 maize (Zea mays L.) population. Compared to normal kernels the opaque-2 kernels were higher in lysine, P, K, Mg, Fe, and Zn concentrations. However, on a kernel weight or kernel volume basis, the opaque-2 kernels were significantly greater only for lysine, K, and Zn. Our results indicated that the opaque-2 gene, or closely linked genes, had a direct influence on K and Zn content as well as on lysine content. The correlation of the differences between the normal and opaque-2 kernels for percent lysine and percent Zn was positive and significant. This relationship may indicate that modifier genes that are influencing the effect of the opaque-2 gene on lysine concentration may also be influencing the effect of the opaque-2 gene on Zn concentration in a similar manner. Several significant correlations were detected between percent lysine and the mineral element concentrations, but none were of sufficient magnitude to be of value as a selection criteria for lysine content. Percent lysine was not correlated with kernel weight or volume but was negatively correlated with kernel density. The coefficients for the correlation between percent lysine and percent protein were +0.50 and +0.70, respectively, for the normal and opaque-2 kernels in the heterozygous population and +0.83 for the homozygous opaque-2 population. The magnitude of these correlation coefficients indicated a rather strong tendency for lysine concentration to increase as protein concentration increased, especially in the opaque-2 kernels. Protein concentration was found to be the best selection criteria for lysine concentration except for possibly the lysine concentration per se.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .