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Functionally associated molecular genetic markers for temperate pasture plant improvement

Forster, J.W., Cogan, N.O.I., Dobrowolski, M.P., Francki, M.G., Spangenberg, G.C. and Smith, K.F. (2008) Functionally associated molecular genetic markers for temperate pasture plant improvement. In: Henry, R.J., (ed.) Plant genotyping II: SNP technology. CABI Publishing, Cambridge, MA, United States, pp. 154-186.

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The key components for implementation of functionally associated genetic markers in perennial ryegrass and white clover breeding have been established. They include: generation of substantial genomic sequence resources; methods for functional analysis and verification of candidate gene status, including transcriptomics and transgenesis; efficient methods for in silico and in vitro discovery and validation of gene-associated SNP loci; evaluation of intra- and inter-population diversity; estimation of SNP haplotype complexity and LD; development of robust protocols for phenotypic analysis of key agronomic traits; design and implementation of experiments for haplotype-phenotype correlation; and development of efficient strategies for gene-based marker deployment in existing germplasm improvement programmes. These processes are mature for perennial ryegrass, and despite the added complexities of genetic architecture in white clover, optimized methods for SNP discovery should be equally effective for the latter species. The strategies are also suitable for other agronomically important temperate forage species, such as the grasses Italian ryegrass, tall fescue (Festuca arundinacea), meadow fescue (Festuca pratensis), cocksfoot (Dactylis glomerata) and timothy (Phleum pratense), as well as the legumes red clover (Trifolium pratense) and lucerne (Medicago sativa).

Item Type: Book Chapter
Publisher: CABI Publishing
Copyright: 2008 CAB International
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