The use of synthetic octoploids in strawberry breeding

Evans, W. D.

doi:10.1007/bf00027017

Cited by 25 publications

(22 citation statements)

References 7 publications

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“…Two of the synthetic octoploids described in detail by EVANS (1977) were used in crosses with breeding lines and cultivars of F. x ananussa. The breeding lines were designated anunasa breeding lines.…”

Section: Methodsmentioning

confidence: 99%

“…The main unexploited gene pool is formed by the species of ploidy levels lower than that of the octoploid cultivars. In an earlier paper EVANS (1977) reviewed the problems encountered in the use of diploid, tetraploid and hexaploid species in crosses with octoploids. To overcome the major problems of fertility and crossability, and to permit backcrossing at the octoploid level, synthetic octoploids were produced from hybrids of diploid, tetraploid and hexaploid species.…”

Section: Introductionmentioning

confidence: 99%

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The production of multispecific octoploids from Fragaria species and the cultivated strawberry

Evans

1982

Euphytica

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INDEX WORDSFruguria sp., strawberry, synthetic polyploidy, interspecific hybridization.A method of incorporating genetic material from five species of Fruguriu and the cultivated strawberry into fertile octoploids is described. A synthetic octoploid derived from a hexaploid x diploid hybrid was crossed to octoploid cultivar breeding lines until a BCz hybrid was produced. A second synthetic octoploid in which two diploid species and a tetraploid species were combined was crossed to a cultivated strawberry to produce a hybrid breeding clone. The two breeding clones were crossed and 222 seedlings were produced. The seedlings were generally vigorous and fruitful, some having commercial potential.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The production of multispecific octoploids from Fragaria species and the cultivated strawberry

Evans

1982

Euphytica

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“…The introgression of important traits as unique flavors, vigor, disease and pest resistance and adaptability to a wide range of environmental conditions from wild species with lower ploidy (2x, 4x and 6x) levels have been difficulty, because of sterility or low fertility of hybrid combinations. Interspecific octoploids involving these wild species were synthesized and were successfully used as male parents in crosses with cultivated strawberry (Evans 1977).…”

Section: Gene Introgression To Cultivated Germplasmmentioning

confidence: 99%

Breeding vegetatively propagated horticultural crops

Bisognin

2011

Crop Breed. Appl. Biotechnol.

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-Horticulture is an important part of agriculture with many important crops being vegetatively propagated. The objectives of this work were to discuss some of the most important characteristics of vegetatively propagated crops and the breeding strategies to develop and propagate new cultivars. Vegetative propagation enables to fix favorable combinations of important traits, very specific chemical compositions, superior genetic variance interactions and high levels of heterozygosity. Breeding new cultivars involve few possibilities of genetic recombination by sexual reproduction and many generations of selection and vegetative propagation. Marker assisted selection should be useful for genotyping and selecting complementary parents for crossing and for identifying superior genotypes at early stages of selection. The tissue culture technique enables to get disease free stock plants and to maximize its multiplication rate, having an important role in yield and quality of these crops.

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“…The Synthetic Octoploid (SO) system was designed (Evans, 1977) to develop octoploid hybrids using Fragaria species with lower ploidy levels. These synthetic octoploids could then be used to introgress germplasm from lower ploidy species into the cultivated strawberry (Fragaria × ananassa Duch).…”

Section: Introductionmentioning

confidence: 99%

Interspecific hybridization of Fragaria moschata with two diploid species, F. nubicola and F. viridis

Bors

Sullivan

2005

Euphytica

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The crosses Fragaria moschata × F. nubicola, F. moschata × F. viridis, and their reciprocal combinations were done to create tetraploids for eventual introgression into octoploid cultivars of Fragaria × ananassa via the synthetic octoploid system. The combination F. nubicola × F. moschata averaged 3.3 healthy plants/pollination, which was 2.3 times higher than the next best combination, F. moschata × F. viridis. Fragaria viridis × F. moschata crosses averaged only 0.1 healthy plants/pollination and no plants were obtained from F. moschata × F. nubicola hybridizations. The success of the F. nubicola × F. moschata crosses in this study indicated that embryo/endosperm ratios were not as important a factor in producing hybrids with F. moschata × diploids species, as previously suggested.Although 90% of pollinated flowers set fruit with an average of 19 seeds/pollination only 15% of the seeds contained healthy, white embryos and only 38% of these developed into healthy seedlings. The remaining 62% of embryos lacked pigment, had short hypocotyls or arrested development after slight expansion out of the seed coat. Only 39% of the crosses resulted in viable progenies. After one year, 27% of these hybrids bloomed and 71% of the blooming hybrids were tetraploids. All six diploid and six of the seven hexaploid accessions were successfully incorporated into 89 hybrids.

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The use of synthetic octoploids in strawberry breeding

Cited by 25 publications

References 7 publications

The production of multispecific octoploids from Fragaria species and the cultivated strawberry

The production of multispecific octoploids from Fragaria species and the cultivated strawberry

Breeding vegetatively propagated horticultural crops

Interspecific hybridization of Fragaria moschata with two diploid species, F. nubicola and F. viridis

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