Introgression of wild species into the cultivated strawberry using synthetic octoploids

Sangiacomo, Miguel Ángel; Sullivan, J. Alan

doi:10.1007/bf00223644

Cited by 16 publications

(16 citation statements)

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“…Plant vigour has been correlated with strawberry yield (Lacy 1973); however, no such correlation was found by Sangiacomo and Sullivan (1994), or in the current study with SO derived material. This lack of correlation is consistent with the poor fruit set in the SOs and early generation material.…”

Section: Discussioncontrasting

confidence: 93%

“…Refinement of the SO system and the inclusion of additional lower-ploidy species has led to the creation of several new SOs that have been crossed with the cultivated strawberry to create F 1 hybrids and first outcross hybrids (OC 1 ) (Bors and Sullivan 1997). Although initial hybrids of the species and cultivars are often low yielding, increased yield and fruit size can be recovered within three to four generations of outcrossing with adapted cultivars (Bringhurst and Voth 1984;Sangiacomo and Sullivan 1994). Similar results were found with the lower-ploidy species hybrids; only 25% of the progeny from the first cross (i.e., SO ) cultivar) produced any seed and set fruit.…”

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confidence: 68%

“…Like the species, the SOs produced high flower numbers; however, as many of the flowers did not set fruit, yields remained low. Fruit set may be a problem in these early generation hybrids (Sangiacomo and Sullivan 1994) and requires careful attention during subsequent generations of breeding. Evans (1982a) indicated that there were differences in vegetative traits among progeny of the SO )cultivar crosses (no data were reported).…”

Section: Discussionmentioning

confidence: 99%

“…Interspecific hybridization among lower-ploidy Fragaria species and F. )ananassa Duch. has been limited due to sexual incompatibility of species differing in ploidy level (Sangiacomo and Sullivan 1994;Scott and Lawrence 1975). The development of the synthetic octoploid (SO) system (Evans 1982c) at the University of Guelph led to the creation of two interspecific hybrids, SO 1 and SO 2 composed of two or three lower-ploidy species.…”

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confidence: 99%

“…However, by the third outcross hybrid, yields were similar and in some cases higher than cultivars. The SOs were considered as a potential source of increased yield through increased flower number (Sangiacomo and Sullivan 1994).…”

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Early generation performance of Fragaria species hybrids in crosses with cultivated strawberry

Harbut¹,

Sullivan²,

Proctor³

et al. 2009

Can. J. Plant Sci.

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. 2009. Early generation performance of Fragaria species hybrids in crosses with cultivated strawberry. Can. J. Plant Sci. 89: 1117Á1126. Yield (i.e., fruit number and size) and yield component measurements were collected and destructive growth analysis carried out on lower-ploidy Fragaria species, synthetic octoploids (SO), F 1 (SO ) cultivar), OC 1 (F 1 ) cultivar) hybrids and cultivars. Plants were grown in two field trials, at the Elora Research Station, Ontario, and at the Wye Research and Education Centre, Queenstown, Maryland, and in one greenhouse trial in Guelph, Ontario. Total plant dry weight (PDW) was highly variable for the species, but the higher vegetative vigour of the SOs compared with mid-parent values suggested a heterotic effect. The shade adapted species (e.g., F. moschata Duch. and F. nubicola) had greater PDWs than the sun adapted species. Yields of the species, SOs and F 1 hybrids were low; however, flower number was higher compared with cultivars. The first outcross with F 1 s and cultivars resulted in a sixfold increase in yield attributed to both increased fruit size and fruit number. Three of the four OC 1 hybrids had yields that were comparable with cultivars. Through breeding and intensive selection, genotypes introgressed with SO germplasm can be restored to the pre-cultivar yield levels with only a few outcrosses to the cultivated strawberry.Key words: Growth analysis, heterosis, interspecific hybridization, strawberry, yield, synthetic octoploid Harbut, R. H., Sullivan, J. A., Proctor, J. T. A. et Swartz, H. J. 2009. Performance des premie`res ge´ne´rations des hybrides d'espe`ces du genre Fragaria croise´es avec le fraisier cultive´. Can. J. Plant Sci. 89: 1117Á1126. Les auteurs ont mesure´le rendement (nombre et calibre des fruits) et les composantes du rendement, puis proce´de´a`une analyse destructive de la croissance des octoploı¨des synthe´tiques (OS), des membres de la F 1 (cultivars )SO), des hybrides OC 1 (F 1 ) cultivar) et des cultivars des espe`ces du genre Fragaria a`faible ploı¨die. Les plants ont e´te´cultive´s lors de deux expe´riences sur le terrain a`la station de recherche d'Elora (Ontario) et au Wye Research and Education Centre, de Queenstown (Maryland), ainsi que lors d'un essai en serre a`Guelph (Ontario). Le poids sec total des plantes (PST) varie conside´rablement avec l'espe`ce, mais la plus forte vigueur ve´ge´tative des OS, comparativement a`la valeur me´diane des parents, laisse croire a`l'he´te´rosis. Les espe`ces acclimate´es a`l'ombre (par ex., F. moschata Duch. et F. nubicola) ont un PST plus e´leve´que les celles adapte´es au soleil. Les espe`ces, les OS et les hybrides de la F 1 ont un faible rendement; cependant ils portent plus de fleurs que les cultivars. Le premier croisement exte´rieur avec des membres de la F 1 et des cultivars multiplie le rendement par six en raison du plus gros calibre des fruits, e´galement plus nombreux. Trois des quatre hybrides OC 1 pre´sentaient un rendement comparable a`celui des cultivars. On pourrait restaurer l...

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Section: Discussioncontrasting

confidence: 93%

mentioning

confidence: 68%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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