Introgression of crown rust resistance from <i>Festuca</i> spp. into <i>Lolium multiflorum</i>

Oertel, C.; Matzk, Fritz

doi:10.1046/j.1439-0523.1999.00415.x

Cited by 18 publications

(9 citation statements)

References 14 publications

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“…Crown rust resistance is moderately to highly heritable in both species and phenotypic selection for resistance is generally highly effective (Cagas, 1989; Enquist and Jönsson, 2001; Wofford and Watson, 1982). Both meadow and tall fescue have served as successful donors of crown rust resistance in interspecific hybrids with Italian ryegrass (Oertl and Matzk, 1999). Excessive susceptibility to crown rust was one factor leading to the nearly complete elimination of meadow fescue from commercial markets in the USA (Buckner et al, 1979).…”

Section: Resultsmentioning

confidence: 99%

Performance of Meadow Fescue Accessions under Management‐Intensive Grazing

Casler

Santen

2001

Crop Science

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Meadow fescue (Festuca pratensis Huds.) is a pasture grass that has been little used in North America since the introduction of its higher yielding relative, tall fescue (F. arundinacea Schreb.). The objectives of this study were to quantify genotypic variation for traits related to performance under management‐intensive grazing (MIG) within the USDA‐NPGS collection of meadow fescue accessions, to relate that variation to the geographic sources, and to compare these meadow fescue accessions to a range of tall fescue cultivars. One hundred‐sixty meadow fescue accessions and 10 tall fescue cultivars were grazed for 2 yr under a free‐choice MIG system. Meadow fescue accessions were an average of 3.0% lower in net herbage accumulation (NHA; 8.33 vs. 8.60 Mg ha−1), but 14.7% higher in apparent intake (3.13 vs. 3.58 Mg ha−1) and 15.1% higher in apparent preference (31.7 vs. 36.4%) compared with tall fescue cultivars. Naturalized meadow fescue accessions had greater apparent intake and preference and were lower in crown rust resistance than cultivated meadow fescue accessions. Cultivated meadow fescue accessions were less variable for all traits than naturalized accessions, reflecting nearly a century of breeding activity in Europe. Most of the variability among accessions was accounted for by geographic sources. Naturalized accessions from the Russian Black Sea region generally ranked most favorably for all traits.

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Section: Resultsmentioning

confidence: 99%

Performance of Meadow Fescue Accessions under Management‐Intensive Grazing

Casler

Santen

2001

Crop Science

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“…Numerous studies have succesfully introduced important traits from F. pratensis into Loliums , including crown rust resistance in L. perenne [ 18 ] and L. multiflorum [ 19 - 21 ], freezing tolerance [ 22 ] and drought tolerance in L. multiflorum [ 23 ]. Species from the Lolium-Festuca complex provide a large pool of genetic variation, both within single species, as well as within the complex.…”

Section: Introductionmentioning

confidence: 99%

Comparative transcriptome analysis within the Lolium/Festuca species complex reveals high sequence conservation

et al. 2015

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BackgroundThe Lolium-Festuca complex incorporates species from the Lolium genera and the broad leaf fescues, both belonging to the subfamily Pooideae. This subfamily also includes wheat, barley, oat and rye, making it extremely important to world agriculture. Species within the Lolium-Festuca complex show very diverse phenotypes, and many of them are related to agronomically important traits. Analysis of sequenced transcriptomes of these non-model species may shed light on the molecular mechanisms underlying this phenotypic diversity.ResultsWe have generated de novo transcriptome assemblies for four species from the Lolium-Festuca complex, ranging from 52,166 to 72,133 transcripts per assembly. We have also predicted a set of proteins and validated it with a high-confidence protein database from three closely related species (H. vulgare, B. distachyon and O. sativa). We have obtained gene family clusters for the four species using OrthoMCL and analyzed their inferred phylogenetic relationships. Our results indicate that VRN2 is a candidate gene for differentiating vernalization and non-vernalization types in the Lolium-Festuca complex. Grouping of the gene families based on their BLAST identity enabled us to divide ortholog groups into those that are very conserved and those that are more evolutionarily relaxed. The ratio of the non-synonumous to synonymous substitutions enabled us to pinpoint protein sequences evolving in response to positive selection. These proteins may explain some of the differences between the more stress tolerant Festuca, and the less stress tolerant Lolium species.ConclusionsOur data presents a comprehensive transcriptome sequence comparison between species from the Lolium-Festuca complex, with the identification of potential candidate genes underlying some important phenotypical differences within the complex (such as VRN2). The orthologous genes between the species have a very high %id (91,61%) and the majority of gene families were shared for all of them. It is likely that the knowledge of the genomes will be largely transferable between species within the complex.Electronic supplementary materialThe online version of this article (doi:10.1186/s12864-015-1447-y) contains supplementary material, which is available to authorized users.

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“…Wilkins et al (1974) showed that an amphiploid between Lm and F. arundinacea exhibited the resistance characteristics of both its parents to the corresponding 'nonhost' strain of P. coronata. Oertel and Matzk (1999) obtained introgression of crown rust resistance from both Fp and F. arundinacea into Lm. The segregation ratios in the progeny of intercrosses of resistant and susceptible BC 3 plants and selfed R plants suggested that the resistance was controlled by two or more dominant genes which were linked in most cases.…”

Section: Introductionmentioning

confidence: 99%

Introgression of crown rust (Puccinia coronata) resistance from meadow fescue (Festuca pratensis) into Italian ryegrass (Lolium multiflorum) and physical mapping of the locus

et al. 2003

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Resistance was found in the meadow fescue (Festuca pratensis) to crown rust (Puccinia coronata), originating from ryegrasses (Lolium spp). A backcrossing programme successfully transferred this resistance into diploid Italian ryegrass (Lolium multiflorum) and genomic in situ hybridisation (GISH) was used to identify the introgressed fescue chromosome segment. The resistant (R) plants in two BC 3 lines all carried an introgressed segment on a single chromosome, which in one of the lines was confined to the short arm of the chromosome. Susceptible (S) plants either contained no introgressed chromosome segment or a segment which was physically smaller than the segments in resistant plants. Using GISH the resistance locus could be physically mapped to the midpoint of a short arm. Segregation ratios of the progeny of BC 3 plants, when crossed as R Â S and R Â R, were in agreement with the hypothesis that the resistance was controlled by a single gene or very closely linked genes. No R plants were produced by crossing S Â S plants.

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Introgression of crown rust resistance from Festuca spp. into Lolium multiflorum

Cited by 18 publications

References 14 publications

Performance of Meadow Fescue Accessions under Management‐Intensive Grazing

Performance of Meadow Fescue Accessions under Management‐Intensive Grazing

Comparative transcriptome analysis within the Lolium/Festuca species complex reveals high sequence conservation

Introgression of crown rust (Puccinia coronata) resistance from meadow fescue (Festuca pratensis) into Italian ryegrass (Lolium multiflorum) and physical mapping of the locus

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