Skip to main content
Article thumbnail
Location of Repository

A theoretical and practical analysis of the optimum breeding system for perennial ryegrass

By P. Conaghan and M.D. Casler

Abstract

peer-reviewedThe goal of plant breeding is to effectively and efficiently select for the best phenotypes leading to the development of improved cultivars. The objectives for this review are to describe and critically evaluate breeding methods appropriate to the improvement of perennial ryegrass (Lolium perenne L.) in a long-term breeding programme. The optimum breeding system is dependent on the traits for improvement, and the available physical and human resources. Forage dry matter yield, persistency, disease resistance, nutritional value and seed yield are considered among the most important traits for improvement. Careful consideration should be given to the expression of the trait under the management regime imposed in the breeding programme and under real-world sward conditions in the target sowing region. Recurrent selection programmes for intrapopulation improvement are most appropriate for breeding perennial ryegrass. Three distinct types of recurrent selection may be implemented: (i) phenotypic recurrent selection, (ii) genotypic recurrent selection and (iii) marker-assisted selection. Genotypic recurrent selection will be a necessary part of the breeding system if forage yield is a trait for improvement. Genotypic recurrent selection may be practiced using full-sib or half-sib families, each with their own advantages and disadvantages. Phenotypic recurrent selection in tandem (i.e., within-family selection) or in succession with genotypic recurrent selection should be used to improve traits that have a high-correlation between performance from spaced plants and from sward plots. Genome-wide selection represents the most interesting and exciting potential application of marker-assisted selection, although it remains to be seen how beneficial it will be in practice

Topics: Breeding method, Efficiency, Gain, Lolium perenne L., Traits for improvement
Publisher: Teagasc (Agriculture and Food Development Authority), Ireland
Year: 2011
OAI identifier: oai:t-stor.teagasc.ie:11019/31
Provided by: T-Stór
Journal:

Suggested articles

Citations

  1. (1996). A comprehensive multisite recurrent selection strategy in perennial ryegrass. doi
  2. (1997). An assessment of the relative importance of specific traits for the genetic improvement of nutritive value in dairy pasture. doi
  3. (2006). Breeding for disease resistance in the major cool-season turfgrasses. doi
  4. (1997). Breeding for improved herbage quality in perennial ryegrass. In:
  5. (1980). Breeding for nutritive quality. doi
  6. (2001). Breeding forage for increased nutritional value. doi
  7. (2010). Breeding methods in cross-pollinated species. In: “Fodder Crops and Amenity Grasses” doi
  8. (2010). Breeding objectives in forages. In: “Fodder Crops and Amenity Grasses” doi
  9. (1989). Crown rust on perennial ryegrass
  10. (1987). Developments and procedures in the assessment of grass varieties at NIAB 1950–87.
  11. (1975). Diseases in the grass crop – problems and progress. Report of the Welsh Plant Breeding Station
  12. (1971). Effect of the number of parents on the mean and variance of synthetic varieties. doi
  13. (1991). Effects of applying propiconazole to grass grown for silage.
  14. (2008). Efficiency of indirect selection for dry matter yield based on fresh matter yield in perennial ryegrass sward plots. doi
  15. (1989). Forage quality of plant parts of perennial grasses and relationship to phenology. doi
  16. (1998). Genetic Analysis of Yield and Quality in Perennial Ryegrass (Lolium perenne L.)”, PhD thesis,
  17. (2009). Genomic selection for crop improvement. doi
  18. (2010). Genomic selection in plant breeding: from theory to practice. doi
  19. (2008). Genotype × environment interactions for forage yield of Lolium perenne L. sward plots in Ireland. doi
  20. (1989). Genotype/harvesting frequency and genotype/nitrogen level interactions for annual dry matter yield in Lolium perenne in relation to breeding.
  21. (1996). Germplasm and cultivar development. In: “Cool-Season Forage Grasses” doi
  22. (1998). Host resistance and tolerance and its deployment. In: “Grass for Dairy Cattle”
  23. (2010). Improving efficiency in breeding forage crops. doi
  24. (2009). Improving selection in forage, turf, and biomass crops using molecular markers. In: “Molecular Breeding of Forage and Turf” doi
  25. (2010). Markerassisted selection in forage crops and turf: a review. In: doi
  26. (2008). Molecular markers and selection for complex traits in plants: learning from the last 20 years. doi
  27. (2001). Prediction of total genetic value using genome-wide dense marker maps.
  28. (1987). Principles of cultivar development. Volume 1. Theory and technique”. doi
  29. (2003). Progress in breeding perennial forage grasses for temperate agriculture. doi
  30. (1983). Putting an economic value on increases in grass production. doi
  31. (2003). Quantitative genetics and breeding methods in autopolyploid plants”.
  32. (1988). Quantitative genetics in maize breeding”, 2nd edition, doi
  33. (1975). Reaction of Italian ryegrass cultivars under grazing as compared with cutting. doi
  34. (2010). Ryegrasses. In: “Fodder Crops and Amenity Grasses” doi
  35. (1960). Selection and population structure in Lolium. IV. Correlated response to selection. doi
  36. (1995). Selection for persistence of tetraploid ryegrasses and festulolium in mixture with perennial legumes. doi
  37. (1984). Selection for yield in Lolium perenne. II. Performance of spaced plant selections under competitive conditions. doi
  38. (1994). Selection parameters of quality traits in perennial ryegrass. In: “Breeding for Quality”
  39. (1990). Spaced-plant traits related to seed yield in plots of perennial ryegrass (Lolium perenne L.). doi
  40. (1972). The genetic basis of present breeding methods in forage crops. doi
  41. (1994). The relationship between progeny seed yield in drilled plots and maternal spacedplant traits in perennial ryegrass (Lolium perenne L.). doi
  42. (2008). Theoretical expected genetic gains for among-and-withinfamily selection methods in perennial forage crops. doi
  43. (1986). Variability and inheritance of digestibility in perennial ryegrass (Lolium perenne), meadow fescue (Festuca pratensis) and cocksfoot (Dactylis glomerata). II. F1 and F2 progeny. doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.