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The relationship between productivity and some components of canopy structure in ryegrass (Lolium spp.)

III. Spaced plant characters, their heritabilities and relationship to sward yield

Published online by Cambridge University Press:  27 March 2009

I. Rhodes
I. Rhodes
Affiliation:
Welsh Plant Breeding Station, Aberystwyth
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Summary

Experiments were carried out to measure the components of canopy structure (on young spaced seedlings), their heritabilities and relationship to sward yield in the F1 generation of a diallel cross between six ryegrass populations.

Considerable differences existed between parent populations in both leaf length and tiller angle, but little difference existed in leaf angle. All the components of canopy structure were highly heritable, tiller angle, leaf length and leaf rigidity showing narrow sense heritabilities greater than 0·75.

There were large differences in yield between F1 families, moreover, when (a) Lolium perenne families, (6) L. multiflorum families and (c) L. perenne x L. mvltiflorum families were considered separately, leaf length and a composite character derived from leaf length and tiller angle (all measured on young spaced seedlings) were closely related to yield under sward conditions.

The plant breeding implications of these results are discussed.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 80 , Issue 1 , February 1973 , pp. 171 - 176
Copyright
Copyright © Cambridge University Press 1973

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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
Cooper, J. P., Rhodes, I. & Sheehy, J. E. (1971). Canopy structure, light interception and potential production in forage grasses. Hep. Welsh Pl. Breed. Stn for 1970, pp. 57–69.Google Scholar
Falconer, D. S. (1960). Introduction to Quantitative Genetics. Edinburgh: Oliver and Boyd.Google Scholar
Hayman, B. I. (1954). The analysis of variance of diallel crosses. Biometrics 10, 235–44.CrossRefGoogle Scholar
Raymond, W. F. (1969). Improving the nutritive value of herbage grasses. Occ. Symp. No. 5, Br. Grassld Soc, pp. 29–36.Google Scholar
Rhodes, I. (1969). The relationship between productivity and some components of canopy structure in ryegrass (Lolium spp.). 1. Leaf length. J. agric. Sci., Camb. 73, 315–19.CrossRefGoogle Scholar
Rhodes, I. (1971 a). The relationship between productivity and some components of canopy structure in ryegrass (Lolium spp). II. Yield, canopy structure and light interception. J. agric. Sci., Camb. 77, 283–92.CrossRefGoogle Scholar
Rhodes, I. (1971 b). Productivity and canopy structure of two contrasting varieties of perennial ryegrass grown in a controlled environment. J. Br. Grassld Soc. 26, 9–15.CrossRefGoogle Scholar
Rhodes, I. (1972). Yield, leaf area index and photosynthetic rate in some perennial ryegrass (Lolium perenne L.) selections. J. agric. Sci., Camb. 78, 509–11.CrossRefGoogle Scholar
Rogers, H. H. (1967). Breeding for maximum production. Occ. Symp. No. 3, Br. Grassld Soc. pp. 66–73.Google Scholar
Sant, F. I. & Rhodes, I. (1970). A note on the relationship between leaf rigidity and leaf anatomy in Lolium perenne L. J. Br. Grassld Soc. 25, 233–35.CrossRefGoogle Scholar