Hostname: page-component-77c89778f8-9q27g Total loading time: 0 Render date: 2024-07-25T00:54:18.345Z Has data issue: false hasContentIssue false
  • English
  • Français

Response of S1 maize varieties and varietal hybrids to altitude and environments in Cameroon

Published online by Cambridge University Press:  27 March 2009

J. A. Ayuk-Takem
J. A. Ayuk-Takem
Affiliation:
Institute of Agronomic Research, P.O. Box 80, Bamenda, Cameroon
Get access Rights & Permissions [Opens in a new window]

Summary

S1 maize varieties and varietal hybrids were tested in six locations ranging in altitude from 236 to 1600 m in Cameroon. The grain yields of highland varieties were observed to increase with each increase in altitude while the yields of the lowland varieties decreased with increasing altitude.

The highland × lowland S1 varietal crosses yielded the same as the lowland parental varieties in highland areas and better than highland parental varieties in lowland areas.

Average yields of all varieties per location increased by about 1·1 t/km increase in altitude. Eberhart & Russell's (1966) stability method found no stable variety while Francis & Kannenberg's (1978) genotype-grouping technique found five highland × lowland crosses to be relatively stable.

Number of days from planting to tasselling increased with increasing altitude by about 20 days/km increase in altitude. Highland and lowland varieties performed poorly outside their zones of adaptation because of high incidence of foliar diseases like leaf blights and rusts.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 98 , Issue 3 , June 1982 , pp. 615 - 622
Copyright
Copyright © Cambridge University Press 1982

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Ayuk-Takem, J. A. (1980). The influence of altitude on agronomic performances of highland maize (Zea mays L.) varieties in Cameroon. Agronomie Tropicale 35 (2), 135–147.Google Scholar
Darrah, L. L., Eberhart, S. A. & Penny, L. H. (1973). A maize breeding methods study in Kenya. Crop Science 12, 601–608.Google Scholar
Eberhart, S. A., Penny, L. H. & Harrison, M. N. (1973). Genotype by environment interaction in maize in Eastern Africa. East African Agricultural and Forestry Journal 39 (1), 61–71.CrossRefGoogle Scholar
Eberhart, S. A. & Russell, W. A. (1966). Stability parameters for comparing varieties. Crop Science 6, 36–40.CrossRefGoogle Scholar
Francis, T. R. & Kannenberg, K. W. (1978). Yield stability studies in short-season maize. I. A descriptive method of grouping genotypes. Canadian Journal of Plant Science 58, 1029–1034.CrossRefGoogle Scholar
Griffing, B. (1956). Concept of general and specific combining ability in relation to diallel crossing systems. Australian Journal of Biological Science 9, 463–493.CrossRefGoogle Scholar
Yamaguchi, J. (1974). Varietal traits limiting the grain yield of tropical maize. IV. Plant traits and productivity of tropical varieties. Soil Science Plant Nutrition 20 (3), 287–304.CrossRefGoogle Scholar