Abstract
Leaf length in perennial ryegrass meadows is a limiting factor for feeding grazing cows. In spite of the phenotypic selection efficiency to improve this trait, synthetic varieties hamper fixing favourable alleles. Our aim was to detect QTLs of vegetative plant height which is highly correlated to leaf length in order to start Molecular Assisted Selection (MAS). Two hundred plants from a cross between two elite plants were used to build a genetic map for each parent with 39 SSR and 47 AFLP markers. The maps consisted of seven linkage groups for both parents, with a length of 408 cM and 548 cM. Plant height was measured in a nursery on spaced plants during spring 2008. Using the Composite Interval Mapping method, we detected two QTLs of plant height in the parent RA958 B on linkage group 2 and 5. The one on LG2 co-localized with a QTL of earliness in vegetative growth after winter explaining 21% of variance. Moreover, two QTLs of plant growth rate were found on linkage groups 4 (RA958 F) and 7 (RA958 B), each of them explaining 11% of variance.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Balfourier, F., Charmet, G., Betin, M., Bourgoin, B. 1992. Les ray-grass. In: Gallais, A., Bannerot, H. (eds.), Amélioration des plantes cultivées: objectifs et critères de sélection (pp. 310–321). INRA Edition, France.
Barre, P., Emile, J.C., Betin, M., Surault, F., Ghesquière,M., Hazard, L. 2006. Morphological characteristics of perennial ryegrass leaves that influence short-term intake in dairy cows. Agron. J 98:978–985.
Grattapaglia, D., Sederoff, R. 1994. Genetic linkage maps of Eucalyptus grandis and Eucalyptus urophylla using a pseudo-testcross: mapping strategy and RAPD markers. Genetics 137:1121–1137.
Hazard, L., Ghesquière, M., Barraux, C. 1996. Genetic variability for leaf development in perennial ryegrass populations. Can. J. Plant Sci. 76:113–118.
Horst, G.L., Nelson, C.J., Asay, K.H. 1978. Relationship of leaf elongation to forage yield of tall fescue genotypes. Crop Sci. 18:715–719.
Jones, E.S., Mahoney, N.L., Hayward, M.D., Armstead, I.P., Jones, J., Humphreys, M.O., King, I.P., Kishida, T., Yamada, T., Balfourier, F., Charmet, G., Forster, J.W. 2002. An enhanced molecular marker based genetic map of perennial ryegrass (Lolium perenne) reveals comparative relationships with other Poaceae genome. Genome 45:282–295.
McGilloway, D.A.; Cushnahan, A.; Laidlaw, A.S.; Mayne, C.S.; Kilpatrick, D.J. 1999. The relationship between level of sward height reduction in a rotationally grazed sward and short-term intake rates of dairy cows. Grass Forage Science 54: 116–126.
Reeder, L., Sleper, D., Nelson, C. 1984. Response to selection for leaf area expansion rate of tall fescue. Crop Sci. 24:97–100.
Rhodes, I. 1969. The relationship between productivity and some components of canopy structure in ryegrass (Lolium spp.). I. Leaf length. J. Agric. Sci. 73:315–319.
Rhodes, I., Mee, S. 1980. Changes in dry matter yield associated with selection for canopy characters in ryegrass. Grass For. Sci. 35:35–39.
Thorogood, D., Kaiser, W.J., Jones, J.G., Armstead, I. 2002. Self-incompatibility in ryegrass12. Genotyping and mapping the S and Z loci of Lolium perenne L. Heredity 88:385–390.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2010 Springer Science+Business Media B.V.
About this paper
Cite this paper
Pauly, L., Flajoulot, S., Barre, P., Garon, J. (2010). Vegetative Plant Height QTLs in Elite Perennial Ryegrass Material. In: Huyghe, C. (eds) Sustainable use of Genetic Diversity in Forage and Turf Breeding. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-8706-5_66
Download citation
DOI: https://doi.org/10.1007/978-90-481-8706-5_66
Published:
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-8705-8
Online ISBN: 978-90-481-8706-5
eBook Packages: Biomedical and Life SciencesBiomedical and Life Sciences (R0)