About Us | Help Videos | Contact Us | Subscriptions



This article in CS

  1. Vol. 36 No. 5, p. 1088-1091
    Received: May 3, 1995

    * Corresponding author(s): Jode@iastate.edu
Request Permissions


Teosinte Cytoplasmic Genomes: I. Performance of Maize Inbreds with Teosinte Cytoplasms

  1. Jode W. Edwards ,
  2. James O. Allen and
  3. James G. Coors
  1. D ep. of Agronomy, Iowa State Univ., Ames, IA 50011
    D ep. of Biological Sciences, 229 Jordan Hall, Indiana Univ., Bloomington, IN 47405
    D ep. of Agronomy, 1575 Linden Drive, Madison, WI, 53706



Cytoplasmic variation in maize (Zea mays L.) is known to influence qualitative phenotypes such as male sterility and teosinte-cytoplasm-associated miniature. Cytoplasmic influences on quantitative characters such as grain yield have been difficult to document. The objective of this research was to study effects of diverse teosinte cytoplasmic genomes on quantitative agronomic characters in two maize inbreds. Ten diverse cytoplasms derived from three subspecies of Z. mays and one Z. perennis cytoplasm were substituted for the cytoplasms of inbreds A619 and W23 by at least six generations of backcrossing. Inbreds with teosinte cytoplasms were compared with A619 and W23 in a replicated field trial in three environments. Five of the 11 cytoplasms had quantitative influences. Three of these five cytoplasms decreased yield, with one of the cytoplasms reducing yield of the A619 nuclear genotype by 1.07 Mg ha−1 or 20%. Many effects were specific to either the A619 or W23 nuclear background indicating that teosinte cytoplasmic genomes interacted with maize nuclear genomes. Cytoplasmic effects tended to be small and unfavorable in the context of a maize breeding program.

Part of a thesis submitted by J.W. Edwards in partial fulfillment of requirements for the M.S. degree at the Univ. of Wisconsin-Madison.

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

Copyright © .