Hostname: page-component-848d4c4894-m9kch Total loading time: 0 Render date: 2024-04-30T15:47:22.826Z Has data issue: false hasContentIssue false
  • English
  • Français

Studies on selection for yield in wheat. An application of genotypic and phenotypic correlations, path-coefficient analysis and discriminant functions

Published online by Cambridge University Press:  27 March 2009

P. K. Das
P. K. Das
Affiliation:
Division of Genetics, I.A.R.I., Delhi-12, India
Get access Rights & Permissions [Opens in a new window]

Summary

Grain yield in wheat, as in other crops, is a complex character, made up of many subcharacters. In the present investigation the study of genotypic and phenotypic correlations and path-coefficient analysis indicated that 250-grain wt. and ear number were two important component characters in wheat. Under these circumstances it would be desirable to select those plants which produce large number of tillers and very large and bold sized grains. The greater the number of tillers on a plant the greater would be the number of grains/plant. Again large and bold type of grain would obviously give higher seed wt.

With the use of discriminant functions it was observed that a maximum genetic gain of 7·44% was obtained when grain yield/plant, 250-grain wt., no. of ears/plant and ear length were included in the function. This would suggest that the discriminant function is superior to straight selection in wheat. However, an expected gain of 4·13% was realized when only 250-grain wt. and grain yield/plant were taken into account. In the present analysis it appeared that relatively more emphasis should be given to grain wt. during selection. To make proper use of such characters in selection, their importance must be considered in the definition of economic worth. Progress measured in terms of yield alone will be less when the economic importance of plant type is ignored.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 79 , Issue 3 , December 1972 , pp. 447 - 453
Copyright
Copyright © Cambridge University Press 1972

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

Adams, M. W. (1967). Basis of yield component compensation in crop plants with special reference to the field bean, Phaseolus vulgaris. Crop Sci. 7, 505–10.Google Scholar
Bhide, V. S. (1963). Discriminant function in wheat hybrid. Indian agric. 7, 76–8.Google Scholar
Brim, C. A., Johnson, H. W. & Cockerham, C. C. (1959). Multiple selection criteria in soybeans. Agron. J. 51, 42–6.CrossRefGoogle Scholar
Dewey, D. R. & Lu, K. H. (1959). A correlation and path-coefficient analysis of crested wheatgrass seed production. Agron. J. 51, 511–18.CrossRefGoogle Scholar
Gandhi, S. M., Sanghi, A. K., Nathawat, K. S. & Bhatnagar, M. P. (1964). Genotypic variability and correlation coefficients relating to grain yield and a few other quantitative characters in Indian wheats. Indian J. Genet. PI. Breed. 24, 1–8.Google Scholar
Grafius, J. E. (1956). Components of yield in oats. A geometrical interpretation. Agron. J. 48, 419–23.CrossRefGoogle Scholar
Grafius, J. E. (1959). Heterosis in barley. Agron. J. 51, 551–4.CrossRefGoogle Scholar
Johnson, H. W., Robinson, H. F. & Comstock, R. E. (1955). Genotypic and phenotypic correlations in soybeans and their implications in selection. Agron. J. 47, 477–83.CrossRefGoogle Scholar
Lush, J. L. (1949). Animal breeding plans. Iowa State Univ. Press, Ames.Google Scholar
Niehaus, M. H. & Pickett, R. C. (1966). Heterosis and combining ability in a diallel cross in Sorghum vulgare Pers. Crop Sci. 6, 33–5.CrossRefGoogle Scholar
Nickell, C. D. & Grafius, J. E. (1969). Analysis of a negative response to selection for high yield in winter barley, Hordeum vulgare L. Crop Sci. 9, 447–51.CrossRefGoogle Scholar
Paroda, R. S. & Joshi, A. B. (1970). Correlations, path-coefficients and the implication of discriminant function for selection in wheat (Triticum aestivum). Heredity 25, 383–92.CrossRefGoogle Scholar
Paroda, R. S. & Joshi, A. B. (1970). Genetic architecture of yield and components of yield in wheat. Indian J. Genet. Pl. Breed. 30, 298–314.Google Scholar
Petr, F. C. & Frey, K. J. (1966). Genotypic correlations, dominance, and heritability of quantitative characters in oats. Crop Sci. 6, 259–62.CrossRefGoogle Scholar
Robinson, H. F., Comstock, F. E. & Harvey, P. H. (1951). Genotypic and phenotypic correlations in corn and their implications in selection. Agron. J. 43, 282–7.CrossRefGoogle Scholar
Sikka, S. M. & Jain, K. B. L. (1958). Correlation studies and the application of discriminant function in aestivum wheats for varietal selection under rainfed condition. Indian J. Genet. Pl. Breed. 18, 178–86.Google Scholar
Simlote, K. M. (1947). An application of discriminant function for selection of durm wheats. Indian J. agric. Sci. 17, 269–80.Google Scholar
Smith, H. F. (1936). A discriminant function for plant selection. Ann. Eugen. 7, 240–50.CrossRefGoogle Scholar
Sprague, G. F. (1966). Quantitative genetics in plant improvement. In Plant Breeding (Ed. Frey, Kenneth J.), pp. 315–47. Iowa State Univ. Press, Ames.Google Scholar
Whitehouse, R. N. H., Thompson, J. B. & Do Valle Ribeiro, M. A. M. (1958). Studies on the breeding of self-pollinated cereals. 2. The use of a diallel cross analysis in yield prediction. Euphytica 7, 147–69.CrossRefGoogle Scholar
Wiebel, D. E. (1956). Inheritance of quantitative characters in wheat. Iowa St Coll. J. Sci. 30, 450–1.Google Scholar