Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-26T01:16:06.721Z Has data issue: false hasContentIssue false
  • English
  • Français

Use of Planting Dates in the Preliminary Evaluation of New Cowpea Cultivars

Published online by Cambridge University Press:  03 October 2008

M. A. B. Fakorede ,
A. E. Akingbohungbe  and
B. A. Ogunbodede
M. A. B. Fakorede
Affiliation:
Department of Plant Science, University of Ife, Ile-Ife, Nigeria
A. E. Akingbohungbe
Affiliation:
Department of Plant Science, University of Ife, Ile-Ife, Nigeria
B. A. Ogunbodede
Affiliation:
Department of Plant Science, University of Ife, Ile-Ife, Nigeria
Get access Rights & Permissions [Opens in a new window]

Summary

Four cultivars of cowpeas (Vigna unguiculata L. Walp.) were grown in 15 sets of conditions (environments) i.e. in several monthly plantings in each of three years. Data for seed yield were analysed to investigate the effectiveness of using planting dates in preliminary yield trials of new cultivars. Extremely significant environment mean squares and wide ranges of environmental indices (− 13.3 to 23.5) and seed yield (11.4 to 48.2 g plant−1) indicated real differences among environments. Stability analyses of the cultivar × environment interactions suggest that, where limited funds preclude the use of several locations, monthly plantings for two or more years could be used effectively in the preliminary evaluation of cultivars without losing much information on their relative ranking.

Type
Research Article
Information
Experimental Agriculture , Volume 19 , Issue 2 , April 1983 , pp. 163 - 168
Copyright
Copyright © Cambridge University Press 1983

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

Akingbohungbe, A. E. (1981). Seasonal variation in cowpea crop performance at Ile-Ife, Nigeria and the relationship to insect damage. Submitted to Insect Science and its Applications.Google Scholar
Allard, R. W. & Bradshaw, A. D. (1964). Implications of genotype environment interactions in applied plant breeding. Crop Science 4:503–508.CrossRefGoogle Scholar
Bilbro, J. D. & Ray, L. L. (1976). Environmental stability and adaptation of several cotton cultivars. Crop Science 26:821–824.CrossRefGoogle Scholar
Eberhart, S. A. & Russell, W. A. (1966). Stability parameters for comparing varieties. Crop Science 6:36–40.CrossRefGoogle Scholar
Ezedinma, F. O. C. (1966). Some observations on the effect of time of planting on the cowpea (Vigna unguiculata (L.) Walp.). Tropical Agriculture, Trinidad 43:83–87.Google Scholar
Ezedinma, F. O. C. (1973). Seasonal variation in vegetative growth of cowpeas (Vigna unguiculata(L.) Walp.) in southern Nigeria. Proceedings of the First International Institute of Tropical Agriculture Grain Legume Improvement Workshop, 138–152.Google Scholar
Fakorede, M. A. B. & Mock, J. J. (1978). Stability and adaptation responses of maizevariety hybrids developed by recurrent selection for grain yield. Maydica 23:89–100.Google Scholar
Finlay, K. W. & Wilkinson, G. N. (1963). The analysis of adaptation in a plant breeding programme. Australian Journal of Agricultural Research 14:742–754.CrossRefGoogle Scholar
Nangju, D., Nwanze, K. F. & Singh, S. R. (1979). Planting date, insect damage and yield of cowpea in western Nigeria. Experimental Agriculture 15:289–298.CrossRefGoogle Scholar
Singh, R. K. & Chaudhary, B. D. (1977). Biometrical Methods in Quantitative Genetic Analysis. New Delhi, India: Kalyani Publishers.Google Scholar
Summerfield, R. J., Wien, H. C. & Minchin, F. R. (1976). Integrated field and glasshousescreening for environmental sensitivity in cowpea (Vigna unguiculata). Experimental Agriculture 12:241–248.CrossRefGoogle Scholar