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

Abstract

 

This article in CS

  1. Vol. 31 No. 6, p. 1480-1483
     
    Received: Nov 13, 1990
    Published: Nov, 1991


    * Corresponding author(s):
 View
 Download
 Alerts
 Permissions
 Share

doi:10.2135/cropsci1991.0011183X003100060017x

Evaluation of Heterotic Patterns among Caribbean and Tropical ✕ Temperate Maize Populations

  1. L. M. Pollak ,
  2. S. Torres-Cardona and
  3. A. Sotomayor-Rios
  1. Field Crops Res. Unit, USDA-ARS, Dep. of Agronomy, Iowa State Univ., Ames, IA 50011

Abstract

Abstract

The integration of tropical maize (Zea mays L.) germplasm into template breeding programs has been difficult and slow. More information on performance of temperate ✕ tropical populations and their heterotic combinations is needed. This study was conducted to compare heterotic patterns among four populations. Two, a Caribbean flint and a Caribbean dent, are useful in the tropics and have potential for temperate areas; the other two are temperate ✕ tropical populations adapted to the tropics. The four populations, their diallel crosses and reciprocals, and a commercial hybrid check were grown in two locations in Puerto Rico during two winter-season environments. The best heterotic combination among the four populations was between the Caribbean flint and dent. The best-yielding population per se was the temperate ✕ tropical population of Reid (Group B) heterotic pattern. The Caribbean flint population had highly significant negative maternal effects for yield. Both reciprocal crosses of the temperate ✕ tropical populations were low yielding. The results indicated that, for temperature breeding programs, both Caribbean populations should be useful for improving Corn Belt maize.

Joint contribution of USDA-ARS and Journal Paper no. J-14188 of the Iowa Agric. and Home Econ. Exp. Stn., Project no. 2778.

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

Copyright © .