A genetic linkage map of microsatellite, gene-specific and morphological markers in diploid Fragaria

Sargent, Daniel J.; Davis, Thomas M.; Tobutt, K. R.; Wilkinson, M. J.; Battey, Nicholas H.; Simpson, D. W.

doi:10.1007/s00122-004-1767-9

Cited by 96 publications

(87 citation statements)

References 34 publications

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“…This phenomenon of distorted segregation ratios of molecular markers due to self-incompatibility has been reported in other species including Fragaria (Sargent et al, 2004), citrus (Ruiz and Asins, 2003), and Phalaris coerulescens (Bian et al, 2004). However, on LG1, just three out of the eight distorted loci mapped close to CDO89 and OSE, markers known to map in the proximity of S (http:/ /ukcrop.net/perl/ace/search/ FoggDB).…”

Section: Linkage Map Constructionsupporting

confidence: 55%

Four QTLs determine crown rust (Puccinia coronata f. sp. lolii) resistance in a perennial ryegrass (Lolium perenne) population

Muylle¹,

Baert²,

Bockstaele

et al. 2005

Heredity

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Crown rust resistance is an important selection criterion in ryegrass breeding. The disease, caused by the biotrophic fungus Puccinia coronata, causes yield losses and reduced quality. In this study, we used linkage mapping and QTL analysis to unravel the genomic organization of crown rust resistance in a Lolium perenne population. The progeny of a pair cross between a susceptible and a resistant plant were analysed for crown rust resistance. A linkage map, consisting of 227 loci (AFLP, SSR, RFLP and STS) and spanning 744 cM, was generated using the two-way pseudo-testcross approach from 252 individuals. QTL analysis revealed four genomic regions involved in crown rust resistance. Two QTLs were located on LG1 (LpPc4 and LpPc2) and two on LG2 (LpPc3 and LpPc1). They explain 12.5, 24.9, 5.5 and 2.6% of phenotypic variance, respectively. An STS marker, showing homology to R genes, maps in the proximity of LpPc2. Further research is, however, necessary to check the presence of functional R genes in this region. Synteny at the QTL level between homologous groups of chromosomes within the Gramineae was observed.LG1 and LG2 show homology with group A and B chromosomes of oat on which crown rust-resistance genes have been identified, and with the group 1 chromosomes of the Triticeae, on which leaf rustresistance genes have been mapped. These results are of major importance for understanding the molecular background of crown rust resistance in ryegrasses. The identified markers linked to crown rust resistance have the potential for use in marker-assisted breeding. Heredity (2005) 95, 348-357.

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Section: Linkage Map Constructionsupporting

confidence: 55%

Four QTLs determine crown rust (Puccinia coronata f. sp. lolii) resistance in a perennial ryegrass (Lolium perenne) population

Muylle¹,

Baert²,

Bockstaele

et al. 2005

Heredity

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“…chiloensis sex chromosome is correct is our finding of the SCAR2 marker at the top of VI-A; this marker has been shown to cosegregate with the seasonal flowering locus (Albani et al 2004), which has been mapped to the top of LG 6 in the diploid FV3FN map (Sargent et al 2004).…”

Section: Sex Expressionmentioning

confidence: 85%

“…In F. chiloensis, male sterility is linked to the markers EMFn153 (at a LOD of 15.01) and EMFv160 (at a LOD of 9.73), both of which clearly map to the bottom of the homeologous LG 6 in the diploid (Sargent et al 2004). Furthermore, SCL values found for male sterility to a marker outside of the group are very weak (LOD of 1.9).…”

Section: Sex Expressionmentioning

confidence: 99%

Comparative Genetic Mapping Points to Different Sex Chromosomes in Sibling Species of Wild Strawberry (Fragaria)

2010

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Separate sexes have evolved repeatedly from hermaphroditic ancestors in flowering plants, and thus select taxa can provide unparalleled insight into the evolutionary dynamics of sex chromosomes that are thought to be shared by plants and animals alike. Here we ask whether two octoploid sibling species of wild strawberry-one almost exclusively dioecious (males and females), Fragaria chiloensis, and one subdioecious (males, females, and hermaphrodites), F. virginiana-share the same sex-determining chromosome. We created a genetic map of the sex chromosome and its homeologs in F. chiloensis and assessed macrosynteny between it and published maps of the proto-sex chromosome of F. virginiana and the homeologous autosome of hermaphroditic diploid species. Segregation of male and female function in our F. chiloensis mapping population confirmed that linkage and dominance relations are similar to those in F. virginiana. However, identification of the molecular markers most tightly linked to the sexdetermining locus in the two octoploid species shows that, in both, this region maps to homeologues of chromosome 6 in diploid congeners, but is located at opposite ends of their respective chromosomes.

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“…The markers used for mapping are listed in Supplemental Table S1. Linkage maps were constructed as described earlier (Sargent et al, 2004). The F2 mapping population was characterized for FvTFL1 using TFL1-6FAM primers (Supplemental Table S1).…”

Section: Genotyping and Mappingmentioning

confidence: 99%

“…We also demonstrate how a 2-bp deletion in FvTFL1 changes the regulation of seasonal life cycles and leads to FvFT-dependent LD flowering. Repressor FvTFL1 Reverses the Photoperiodic Requirement for Flower Induction SFL, which causes seasonal flowering in F. vesca (Brown and Wareing, 1965;Albani et al, 2004), was initially mapped to F. vesca linkage group 6 (Sargent et al, 2004). In a recent study, association was found between perpetual flowering habit and a 2-bp deletion in the first exon of F. vesca TFL1 homolog, and the gene was roughly mapped between two markers with a physical distance of approximately 11 Mb in the same linkage group (Iwata et al, 2012).…”

mentioning

confidence: 99%

Mutation inTERMINAL FLOWER1Reverses the Photoperiodic Requirement for Flowering in the Wild StrawberryFragaria vesca

et al. 2012

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Photoperiodic flowering has been extensively studied in the annual short-day and long-day plants rice (Oryza sativa) and Arabidopsis (Arabidopsis thaliana), whereas less is known about the control of flowering in perennials. In the perennial wild strawberry, Fragaria vesca (Rosaceae), short-day and perpetual flowering long-day accessions occur. Genetic analyses showed that differences in their flowering responses are caused by a single gene, SEASONAL FLOWERING LOCUS, which may encode the F. vesca homolog of TERMINAL FLOWER1 (FvTFL1). We show through high-resolution mapping and transgenic approaches that FvTFL1 is the basis of this change in flowering behavior and demonstrate that FvTFL1 acts as a photoperiodically regulated repressor. In short-day F. vesca, long photoperiods activate FvTFL1 mRNA expression and short days suppress it, promoting flower induction. These seasonal cycles in FvTFL1 mRNA level confer seasonal cycling of vegetative and reproductive development. Mutations in FvTFL1 prevent long-day suppression of flowering, and the early flowering that then occurs under long days is dependent on the F. vesca homolog of FLOWERING LOCUS T. This photoperiodic response mechanism differs from those described in model annual plants. We suggest that this mechanism controls flowering within the perennial growth cycle in F. vesca and demonstrate that a change in a single gene reverses the photoperiodic requirements for flowering.

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A genetic linkage map of microsatellite, gene-specific and morphological markers in diploid Fragaria

Cited by 96 publications

References 34 publications

Four QTLs determine crown rust (Puccinia coronata f. sp. lolii) resistance in a perennial ryegrass (Lolium perenne) population

Four QTLs determine crown rust (Puccinia coronata f. sp. lolii) resistance in a perennial ryegrass (Lolium perenne) population

Comparative Genetic Mapping Points to Different Sex Chromosomes in Sibling Species of Wild Strawberry (Fragaria)

Mutation inTERMINAL FLOWER1Reverses the Photoperiodic Requirement for Flowering in the Wild StrawberryFragaria vesca

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