Phenotypic correlations between vegetative characters and yield components in strawberry

Lacey, C. N. D.

doi:10.1007/bf00036655

Cited by 34 publications

(26 citation statements)

References 6 publications

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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: 94%

“…Strawberry yield has been correlated with several components including crown number, number of leaves per plant, number of fruit per plant (Lacy 1973), crown dry weight (Strik and Proctor 1988a, b), and plant size (Olsen et al 1985). However, the relative importance of individual yield components is difficult to determine as they can vary between strawberry cultivars (Hancock et al 1983;Strik and Proctor 1988b).…”

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confidence: 99%

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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: 94%

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confidence: 99%

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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“…In univariate analyses of traits, the largest effect was observed for plant size. Aside from its positive association with yield in strawberry (Lacey, 1973), plant size is a key structural component of plant architecture—which amongst other qualities can influence the efficacy of biocontrol in cultivated systems (Cloyd & Sadof, 2000; Udayagiri & Welter, 2000). As a proxy for natural selection, mesoclimatic variation accounted for up to a third of genetic variation in plant size—due, prospectively, to local adaption across the region of study.…”

Section: Discussionmentioning

confidence: 99%

Capturing genetic variation in crop wild relatives: An evolutionary approach

Egan

Muola

Stenberg

2018

Evolutionary Applications

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Crop wild relatives (CWRs) offer novel genetic resources for crop improvement. To assist in the urgent need to collect and conserve CWR germplasm, we advance here the concept of an “evolutionary” approach. Central to this approach is the predictive use of spatial proxies of evolutionary processes (natural selection, gene flow and genetic drift) to locate and capture genetic variation. As a means to help validate this concept, we screened wild‐collected genotypes of woodland strawberry (Fragaria vesca) in a common garden. A quantitative genetic approach was then used to test the ability of two such proxies—mesoclimatic variation (a proxy of natural selection) and landscape isolation and geographic distance between populations (proxies of gene flow potential)—to predict spatial genetic variation in three quantitative traits (plant size, early season flower number and flower frost tolerance). Our results indicated a significant but variable effect of mesoclimatic conditions in structuring genetic variation in the wild, in addition to other undetermined regional scale processes. As a proxy of gene flow potential, landscape isolation was also a likely determinant of observed patterns—as opposed to, and regardless of, geographic distance between populations. We conclude that harnessing proxies of adaptive and nonadaptive evolutionary processes could provide a robust and valuable means to identify genetic variation in CWRs. We thus advocate wider use and development of this approach amongst researchers, breeders and practitioners, to expedite the capture and in situ conservation of genetic resources provided by crop wild relatives.

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“…In our study, it can be concluded that the higher yield potential in the OCS than in CCS was due to larger plants and greater numbers of berries as well as somewhat bigger berries. The number of berries per plant mainly determines the fruit yield, because of a strong positive correlation between these two characteristics (Lacey 1973). …”

Section: Impact Of Cropping Systemmentioning

confidence: 99%

Effect of cropping system and peat amendment on strawberry growth and yield

Vestberg¹,

Kukkonen²,

Kuru³

et al. 2008

AFSci

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Comparative studies have usually shown higher yields in conventional cropping systems (CCS) than in organic cropping systems (OCS). By utilizing a long-term field experiment on silt soil with 18 years of cropping history (1982)(1983)(1984)(1985)(1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999), including three OCSs and one CCS, we studied if this is true also for strawberry. The strawberry experiment was conducted in 2000-2002. The experiment had one CCS (A) and three OCSs (B,C,D). The impact of pre-planting peat amendment was also studied. The degree of overwintering, fruit yields, yield components and some soil nutrients were determined. Total and marketable fruit yields were estimated using a peduncle analysis based on weights of fruits of different orders in the peduncle, numbers of healthy and injured fruits in the peduncle and the number of peduncles per plant. The shoot growth, total and marketable fruit yields, as well as all yield components estimated were significantly higher in the OCS rotation D than in the CCS rotation A. The peat amendment, but not the cropping system, decreased the percentage of strawberry plants suffering from or killed by winter damage. However, peat amendment did not affect yield. The cropping system had no impact on soil pH, or the amount of extractable calcium, magnesium and nitrate. Extractable phosphorus and potassium were higher and soil organic carbon (C org ) slightly higher in the OCS than in the CCS. The peat amendment increased C org by 2%. The amounts of extractable nutrients in soil were not a limiting factor for strawberry growth and yield as they were of sufficient levels both in CCS and OCS. It remains unclear whether the higher yield in the OCS was due to a long-term cropping history or to a short-term effect of composted manure, or to a combination of these two. The importance of soil organic management in strawberry production is emphasized.

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Phenotypic correlations between vegetative characters and yield components in strawberry

Cited by 34 publications

References 6 publications

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

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

Capturing genetic variation in crop wild relatives: An evolutionary approach

Effect of cropping system and peat amendment on strawberry growth and yield

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