Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-28T16:22:44.324Z Has data issue: false hasContentIssue false
  • English
  • Français

Ryegrass populations from intensively managed leys:I. Seedling and spaced plant characters

Published online by Cambridge University Press:  27 March 2009

A. H. Charles
A. H. Charles
Affiliation:
Welsh Plant Breeding Station
Get access Rights & Permissions [Opens in a new window]

Summary

Seed of Lolium perenne L. was grown from material collected from three S.23 leys and one S.24 ley that had been subjected to high rates of stocking and nitrogen application. Comparisons were made between plants grown from seed derived from the leys and from breeders' seed of S.23 and S.24.

Seedling characters indicated that the populations derived from leys differed from each other and from the plants grown from breeders' seed. In S.23 populations the main change occurring in intensively grazed leys was towards higher tillering prostrate seedlings. This did not occur in the S.24, but here the survivor population had a slightly shorter fifth leaf and a lower number of leaves on the main tiller of the seedlings.

As spaced plants, the population derived from the S.23 ley, with the highest percentage ryegrass and the reputation for the highest yields on the farm, gave a higher yield, recorded in three cuts in the first year and in four cuts in the second year, than any other populations. Small differences between S.23 populations in aftermath heading, reaction to rust, and mean date of panicle emergence were recorded. Variance of spaced plant yield decreased in ryegrass derived from older S.23 leys. The S.24 ‘survivor’ population was much later in mean date of panicle emergence than S.24 grown from breeders' seed.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 75 , Issue 1 , August 1970 , pp. 103 - 107
Copyright
Copyright © Cambridge University Press 1970

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

Beard, D. E. & Hollowell, E. A. (1952). The effect on performance when seed of forage crop varieties is grown under different environmental conditions. Proc. 6th int. Grassld Congr. 1, 860–6.Google Scholar
Beddows, A. K., Breese, E. L. & Lewis, B. (1962). The genetic assessment of heterozygous breeding material by means of a diallel cross. I. Description of parents, self and cross-fertility and early seedling vigour. Heredity, Lond. 17, 501–12.CrossRefGoogle Scholar
Breese, E. L. & Charles, A. H. (1962). Population studies in ryegrass. Rep. Welsh Pl. Breed. Stn, 1961, pp. 30–4.Google Scholar
Brougham, R. W. & Harris, W. (1967). Rapidity and extent of changes in genotypic structure induced by grazing in a ryegrass population. N.Z. Jl agric. Res. 10, 56–65.CrossRefGoogle Scholar
Charles, A. H. (1961). Differential survival of cultivars of Lolium, Dactylis and Phleum. J. Br. Grassld Soc. 16, 69–75.CrossRefGoogle Scholar
Charles, A. H. (1964). Differential survival of plant types in swards. J. Br. Grassld Soc. 19, 198–204.CrossRefGoogle Scholar
Charles, A. H. (1966). Variation in grass and clover populations in response to agronomic selection pressures. Proc. X int. Grassld Congr., Helsinki, pp. 625–9.Google Scholar
Cooper, J. P. (1963). Species and population differences in climatic response. In: Environmental Control of Plant Growth. Ed. Evans, L. T., pp. 381–403. New York: Academic Press.CrossRefGoogle Scholar
Davies, W. E. (1954). Shift in a late-flowering strain of perennial ryegrass (Lolium perenne). Proc. Eur. Grassld Congr. O.E.E.C. Paris, pp. 102–6.Google Scholar
Evans, G., Davies, W. E. & Charles, A. H. (1961). Shift and the production of authenticated seed of herbage cultivars. Rep. Welsh Pl. Breed. Stn., 1960, pp. 99–105.Google Scholar
Hayward, M. D. (1970). Selection and survival in Lolium perenne L. Heredity, Lond. (in the Press).CrossRefGoogle Scholar
Lazenby, A. & Rogers, H. H. (1962). Selection criteria in grass breeding. I. J. agric. Sci., Camb. 59, 51–66.CrossRefGoogle Scholar
Sonneveld, A. (1955). The response of different types of perennial ryegrass and timothy to different managements. Versl. cent. Inst. landbouwk, Onderz. pp. 58–66.Google Scholar
Smith, Dale (1955). Influence of area of seed production on the performance of Ranger Alfalfa. Agron. J. 47, 201–5.CrossRefGoogle Scholar
Sylven, Nils (1937). The difference of climatic conditions on type composition. Bull. Bur. Pl. Genet. 21, 8.Google Scholar
Thomas, R. L. (1966). The influence of seed weight on seedling vigour in Lolium perenne. Ann. Bot. 30, 111–21.CrossRefGoogle Scholar
Valle, O. & Garrison, C. S. (1959). Seed production of Finnish single-cut Tammisto red clover at different latitudes and the influence of these environmental conditions on varietal performance. Ann. acad. Sci. Fenn. A IV, 45, 1–20.Google Scholar
Williams, I. G. & Hughes, R. (1969). Evaluating grasses and clover in a plant breeding station. Grass and Forage Breeding, Symp. no. 5, Br. Grassld Soc., pp. 53–8.Google Scholar