, Volume 33, Issue 3, pp 801–810

Causes of negative correlations between grain yield and grain protein concentration in common wheat

  • Solomon Kibite
  • L. E. Evans

DOI: 10.1007/BF00021906

Cite this article as:
Kibite, S. & Evans, L.E. Euphytica (1984) 33: 801. doi:10.1007/BF00021906


In a study designed to investigate the nature and basis of the relationships between grain yield (GY) and grain protein concentration (GBC) in common wheat, 11 populations, including 4 homozygous-homogeneous and 7 heterozygous-heterogeneous populations, were evaluated in a space planted and a solid seeded trial. Analysis of yield and protein data from each population revealed that phenotypic and environmental correlations between GY and GPC were negative and highly significant, whereas genetic correlation was significant in only one of 7 segregating populations studied. These results suggested that the inverse relationships between GY and GPC, although phenotypically real, were not caused by genetic factors. It would appear that environmental factors, source-sink interactions, and dilution of protein by non-protein compounds were the major agents that caused undesirable associations between the two traits.

Index words

Trictium aestivumcommon wheatprotein contentgenetic correlationsenvironmental correlations

Copyright information

© Dr. H. Veenman en Zonen B.V 1984

Authors and Affiliations

  • Solomon Kibite
    • 1
  • L. E. Evans
    • 2
  1. 1.Department of Plant ScienceUniversity of AlbertaEdmontonCanada
  2. 2.Department of Plant ScienceUniversity of ManitobaWinnipegCanada