Hostname: page-component-848d4c4894-nr4z6 Total loading time: 0 Render date: 2024-05-01T00:15:24.185Z Has data issue: false hasContentIssue false
  • English
  • Français

Developmental genetics of leaf formation in Lolium 3. Inheritance of a developmental complex

Published online by Cambridge University Press:  14 April 2009

K. J. R. Edwards
K. J. R. Edwards
Affiliation:
Department of Genetics, Milton Road, Cambridge
Rights & Permissions [Opens in a new window]

Summary

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Using four lines derived from a single base population of Lolium perenne by selection for large leaf size (LL), small leaf size (SL), fast rate of leaf appearance (FR), and slow rate of leaf appearance (SR), the inheritance of a number of related characters specifying various aspects of leaf development was studied. F1 and F2 generations were produced for all possible crosses between these four lines.

The genetic differences between the selection lines were largely additive for all characters studied and entirely so for rate of leaf appearance, duration of elongation of a single leaf and for the time interval between the maturation of leaf 3 and the unfolding of the next youngest leaf on the same side of the apex, leaf 5. The non-additive variances noted in rate of total leaf area formation, individual leaf size and its components length and width, and in the rate of leaf elongation, were associated with a tendency towards heterosis in these characters. This was quite marked in some crosses and tended to be larger for the more complex characters, rate of total leaf area formation and leaf size, suggesting that the heterosis was, to a considerable extent, due to interactions between genes controlling component characters.

The data confirmed the earlier finding that the negative correlated selection response between leaf size and rate of leaf appearance was due to a basic association between the maturation of a leaf and the unfolding (onset of rapid elongation) of the next youngest leaf on the same side of the apex. Thus an increase in rate of leaf appearance reduces the duration of elongation of a leaf and this in turn will reduce leaf length. However, the basic association, which seems to be controlled by vascular development of the young leaf, is not entirely invariate.

Type
Research Article
Information
Genetics Research , Volume 16 , Issue 1 , August 1970 , pp. 17 - 28
Copyright
Copyright © Cambridge University Press 1970

References

REFERENCES

Cooper, J. P. & Edwards, K. J. R. (1961). The genetic control of leaf development in Lolium. 1. Assessment of genetic variation. Heredity 16, 63–82.CrossRefGoogle Scholar
Dickinson, A. G. & Jinks, J. L. (1956). A generalised analysis of diallel crosses. Genetics 41, 66–78.CrossRefGoogle ScholarPubMed
Edwards, K. J. R. (1967 a). Developmental genetics of leaf formation in Lolium. 1. Basic patterns of leaf development in L. multiflorum and L. perenne. Genetical Research 9, 233–245.CrossRefGoogle Scholar
Edwards, K. J. R. (1967 b). Developmental genetics of leaf formation in Lolium. 2. Analysis of selection lines. Genetical Research 9, 247–257.CrossRefGoogle Scholar
Edwards, K. J. R. & Cooper, J. P. (1963). The genetic control of leaf development in Lolium. 2. Response to selection. Heredity 18, 307–317.CrossRefGoogle Scholar
Edwards, K. J. R. & Emara, Y. A. (1970). Variation in plant development within a population of Lolium multiflorum. Heredity 25, 179–194.CrossRefGoogle Scholar
Hayman, B. I. (1954). The analysis of variance of diallel tables. Biometrics 10, 235–244.CrossRefGoogle Scholar
Jenkin, T. J. (1931). Methods and techniques of selection, breeding and strain-building in grass. Imperial Bureau of Plant Genetics, Aberystwyth: Herbage Plants Bulletin, no. 3, pp. 5–34.Google Scholar
Jinks, J. L. (1954). The analysis of continuous variation in a diallel cross of Nicotiana rustica varieties. Genetics 39, 767–788.CrossRefGoogle Scholar
Mather, K. (1949). Biometrical Genetics. London: Methuen.Google Scholar