About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in AJ

  1. Vol. 64 No. 3, p. 285-288
     
    Received: Apr 22, 1971
    Published: May, 1972


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2134/agronj1972.00021962006400030009x

Crown-freezing and Natural Survival Comparisons in Winter Wheat1

  1. D. D. Warnes and
  2. V. A. Johnson2

Abstract

Abstract

Survival from artificial crown-freezing and field nurseries was compared for 31 winter wheat (Triticum aestivum L.) varieties. Both −8.9 C and −11.6 C crownfreezing temperatures were required to adequately differentiate all 31 wheat varieties into coldhardiness levels. Crown-freezing survival percentages were lower at each later reading date following crown freezing. Delayed crown-freezing survival readings correlated better with natural survival from the uniform regional nurseries than readings taken soon after the freezing cycle. The general level of correlations of crown-freezing survival with natural survival was lower for winter wheat than previously presented by the authors for winter barley (Hordeum vulgare L.). Contributing factors may have been the wide range of winterhardiness in winter wheat and inadequate locations of tests for differential natural survival. The crown-freezing technique would enable the whiter wheat plant breeder to evaluate material for cold-hardiness every year instead of only those few isolated winters that produce differential natural field survival.

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

Copyright © .