Genetics of Sex Expression in Fragaria Species

Ahmadi, Hamid; Bringhurst, R. S.

doi:10.2307/2445260

Cited by 46 publications

(54 citation statements)

References 11 publications

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“…Thus, the two species may not share the same sex-determining region as has previously been assumed (Ahmadi and Bringhurst 1991).…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, the high-fruiting hermaphrodites that are known to exist in F. virginiana (Ashman 1999;Bishop et al 2010) are extremely rare in F. chiloensis (Hancock and Bringhurst 1979). It has been assumed that both species share the same genetic sex-determination system, i.e., a single locus or gene region with three alleles (femaleness ''F'' dominant to hermaphroditism ''h'' and maleness ''m'': Ahmadi and Bringhurst 1991). However, this model was re-evaluated for F. virginiana by scoring male and female function separately and using genetic mapping (Spigler et al 2008).…”

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confidence: 99%

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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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“…Thus, the two species may not share the same sex-determining region as has previously been assumed (Ahmadi and Bringhurst 1991).…”

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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

2010

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“…Principal Coordinates Analysis (PCoA) was done by similarity coefficient. Data were analysed in Popgene32 version 1 …”

Section: Data Analysesmentioning

confidence: 99%

“…In the most of these studies, Osmanli strawberry, which have some superior characteristics (taste, aroma, the situation of fruit stalk, etc.) and male sterility that makes breeding studies easier, has been used as maternal parent (Kaska and Paydas, 1986 The knowledge about genetic structure is important, especially when it is worked with wild species (Ahmadi and Bringhurst, 1991). Morphological, physiological and cytological characteristics were used at the beginning for the determination of genetic variation, afterwards, biochemical markers were developed.…”

Section: Introductionmentioning

confidence: 99%

The Genetic Relationship Between Some Strawberry Cultivars and F1 Population Derived From These Cultivars

Erdem¹,

Çekiç²

2018

Appl. Ecol. Env. Res.

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Abstract. In this study, while Osmanli strawberry, which has some superior characteristics like taste, aroma and male sterility that makes breeding studies easier, has been used as maternal parent, three local (Karacilek, Tuylu and Deli) cultivars in Turkey and three standard (Kabarla, Sweet Ann and Sweet Charlie) strawberry cultivars were used as paternal parents. Molecular analyses were conducted for determination of polymorphism levels by using 14 UBC-ISSR primers for the examination of 52 F1 genotypes that included selections as a result of hybridization studies, parents that were used in hybridization studies, and Fragaria chiloensis. 76 DNA bands were obtained in total and 60 of them were determined as polymorphic. The resulting data of the evaluation of ISSR-PCR bands, were analysed in Popgene32 and MEGA5.0 packaged software and the dendrogram was obtained according to the UPGMA method. The dendrogram was separated into two major groups at the 20% difference level, one is larger and the other is smaller. While Fragaria chiloensis, Tuylu-2 local cultivar, CC48 and CA97 F1 genotypes participated in the small group, the other F1 genotypes and parents participated in the larger group.

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“…Sex in polyploid strawberries was previously thought to be determined by a single Mendelian locus consisting of either a single gene or a gene complex (see Figure 1; Ahmadi and Bringhurst, 1991). However, Spigler et al (2008) were able to tease apart the genetics of sex determination in this species by separately mapping female function (X5% fruit-forming flowers) and male function (presence of pollen-filled anthers) in a mapping population derived from a cross between a F. virginiana female and hermaphrodite (which served as the male parent).…”

mentioning

confidence: 99%

Sex chromosome evolution: A ‘missing link’ in the evolution of sex chromosomes

Moore

2008

Heredity

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Genetics of Sex Expression in Fragaria Species

Cited by 46 publications

References 11 publications

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

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

The Genetic Relationship Between Some Strawberry Cultivars and F1 Population Derived From These Cultivars

Sex chromosome evolution: A ‘missing link’ in the evolution of sex chromosomes

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