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2. A DNA marker assay based on high-resolution melting curve analysis for distinguishing species of the Festuca–Lolium complex

Birrer, Martina, Kölliker, Roland, Manzanares, Chloe, Asp, Torben and Studer, Bruno (2014)

The grass breeding industry is interested in a fast and cheap method of identifying contamination in seeds of Italian and perennial ryegrass (Lolium perenne L. and L. multiflorum Lam., respectively). This study shows that high-resolution melting curve analysis in combination with...

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3. A draft sequence assembly of the perennial ryegrass (Lolium perenne) genome

Byrne, Stephen, Armstead, Ian, Swain, Suresh C, Panitz, Frank, Hedegaard, Jakob, Bendixen, Christian, Nagy, Istvan, Farrell, Jacqueline D., Studer, Bruno, Caccamo, Mario and Asp, Torben (2014)

Perennial ryegrass (Lolium perenne L.) is an outbreeding diploid species and one of the principal forage crops used in temperate agriculture. A sequenced genome will both enhance efforts to understand the genetic control of important traits, and accelerate the application of...

Conference Contributions

4. A gene encoding a DUF247 domain protein co-segregates with the S self-incompatibility locus in perennial ryegrass

Manzanares, Chloé, Barth, Susanne, Thorogood, Daniel, Byrne, Stephen L., Yates, Steven, Czaban, Adrian, Asp, Torben, Yang, Bicheng and Studer, Bruno (2016)

The grass family (Poaceae), the fourth largest family of flowering plants, encompasses the most economically important cereal, forage and energy crops, and exhibits a unique gametophytic self-incompatibility (SI) mechanism that is controlled by at least two multi-allelic and...

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7. A transciptome map of perennial ryegrass (Lolium perenne L.)

Studer, Bruno, Byrne, Stephen, Nielsen, Rasmus O., Panitz, Frank, Bendixen, Christian, Islam, Shofiqul Md., Pfeifer, Matthias, Lübberstedt, Thomas and Asp, Torben (2012)

Background: Single nucleotide polymorphisms (SNPs) are increasingly becoming the DNA marker system of choice due to their prevalence in the genome and their ability to be used in highly multiplexed genotyping assays. Although needed in high numbers for genome-wide marker profiles...

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8. ‘‘Blind’’ mapping of genic DNA sequence polymorphismsin Lolium perenne L. by high resolution melting curve analysis

Stude, Bruno, Fiil, Alice, Jensen, Louise and Asp, Torben (2009)

High resolution melting curve analysis (HRM) measures dissociation of double stranded DNA of a PCR product amplified in the presence of a saturating fluorescence dye. Recently, HRM proved successful to genotype DNA sequence polymorphisms such as SSRs and SNPs based on the shape of...

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9. Comparative sequence analysis of VRN1 alleles of Lolium perenne with the co-linear regions in barley, wheat, and rice

Asp, Torben, Byrne, Stephen, Gundlach, Heidrun, Bruggmann, Rémy, Mayer, Klaus F.X., Andersen, Jeppe R., Xu, Mingliang, Greve, Morten, Lenk, Ingo and Lubberstedt, Thomas (2011)

Vernalization, a period of low temperature to induce transition from vegetative to reproductive state, is an important environmental stimulus for many cool season grasses. A key gene in the vernalization pathway in grasses is the VRN1 gene. The objective of this study was to...

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14. EST-derived SSR markers used as anchor loci for the construction of a consensus linkage map in ryegrass (Lolium spp.)

Studer, Bruno, Kölliker, Roland, Muylle, Hilde, Asp, Torben, Frei, Ursula, Roldan-Ruiz, Isabel, Barre, Philippe, Tomaszewski, Céline, Meally, Helena, Barth, Susanne, Skøt, Leif, Armstead, Ian P., Dolstra, Oene and Lübberstedt, Thomas (2010)

Background: Genetic markers and linkage mapping are basic prerequisites for marker-assisted selection and map-based cloning. In the case of the key grassland species Lolium spp., numerous mapping populations have been developed and characterised for various traits. Although some...

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16. Expressed sequence tag-derived microsatellite markers of perennial ryegrass (Lolium perenne L.)

Studer, Bruno, Asp, Torben, Frei, Ursula, Hentrup, Stephan, Meally, Helena, Guillard, Aurélie, Barth, Susanne, Muylle, Hilde, Roldan-Ruiz, Isabel, Barre, Philippe, Koning-Boucoiran, Carole, Uenk-Stunnenberg, Gerda, Dolstra, Oene, Skøt, Leif, Skøt, Kirsten P., Turner, Lesley B., Humphreys, Mervyn O., Kölliker, Roland, Roulund, Niels, Nielsen, Klaus K. and Lübberstedt, Thomas (2008)

An expressed sequence tag (EST) library of the key grassland species perennial ryegrass (Lolium perenne L.) has been exploited as a resource for microsatellite marker development. Out of 955 simple sequence repeat (SSR) containing ESTs, 744 were used for primer design. Primer...

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19. Genetics and biology of cytoplasmic male sterility and its applications in forage and turf grass breeding

Islam, Shofiqul Md., Studer, Bruno, Møller, Ian M. and Asp, Torben (2014)

Hybrid breeding can exploit heterosis and thus offers opportunities to maximize yield, quality and resistance traits in crop species. Cytoplasmic male sterility (CMS) is a widely applied tool for efficient hybrid seed production. Encoded in the mitochondrial genome, CMS is...

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20. Genome Wide Allele Frequency Fingerprints (GWAFFs) of populations via genotyping by sequencing

Byrne, Stephen, Czaban, Adrian, Studer, Bruno, Panitz, Frank, Bendixen, Christian and Asp, Torben (2013)

Genotyping-by-Sequencing (GBS) is an excellent tool for characterising genetic variation between plant genomes. To date, its use has been reported only for genotyping of single individuals. However, there are many applications where resolving allele frequencies within populations...

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27. The genetic control of self-incompatibility in grasses revisited – are there really just two loci?

Thorogood, Danny, Manzanares, Chloe, Hegarty, Matthew, Barth, Susanne, Asp, Torben and Studer, Bruno (2014)

Outcrossing grasses possess a self-recognition mechanism that prevents pollination of identical genotypes thus ensuring the maintenance of heterozygous populations. The self-incompatibility (SI) system is long-recognised as consisting of two complementary loci (S and Z) that act...

Conference Contributions

29. The genome and transcriptome of perennial ryegrass mitochondria

Islam, Shofiqul, Studer, Bruno, Byrne, Stephen, Farrell, Jacqueline D., Panitz, Frank, Bendixen, Christian, Møller, Ian M. and Asp, Torben (2013)

Background: Perennial ryegrass (Lolium perenne L.) is one of the most important forage and turf grass species of temperate regions worldwide. Its mitochondrial genome is inherited maternally and contains genes that can influence traits of agricultural importance. Moreover, the DNA...

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30. The Perennial Ryegrass GenomeZipper

Pfeifer, Matthias, Martis, Mihaela, Asp, Torben, Mayer, Klaus F.X., Lübberstedt, Thomas, Byrne, Stephen, Frei, Ursula and Studer, Bruno (2013)

Whole-genome sequences established for model and major crop species constitute a key resource for advanced genomic research. For outbreeding forage and turf grass species like ryegrasses (Lolium spp.), such resources have yet to be developed. Here, we present a model of the...

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33. Unravelling self-incompatibility for efficient forage and turf grass breeding

Studer, Bruno, Manzanares, Chloe, Thorogood, Danny, Barth, Susanne, Byrne, Stephen, Lubberstedt, Thomas and Asp, Torben (2013)

Perennial ryegrass is one of the most important grassland species of temperate regions worldwide. It exhibits a gametophytic self-incompatibility (SI) system which is controlled by two independent loci, S and Z. Therefore, perennial ryegrass has - so far - been improved as open...

Conference Contributions

34. Using a candidate gene-based genetic linkage map to identify QTL for winter survival in perennial ryegrass

Paina, Cristiana, Byrne, Stephen L., Studer, Bruno, Rognli, Odd Arne and Asp, Torben (2016)

Important agronomical traits in perennial ryegrass ( Lolium perenne ) breeding programs such as winter survival and heading date, are quantitative traits that are generally controlled by multiple loci. Individually, these loci have relatively small effects. The aim of this study...

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