Dormancy and chilling requirement of strawberry varieties for early forcing

Kronenberg, H.G.; Wassenaar, L. M.

doi:10.1007/bf00039341

Cited by 17 publications

(10 citation statements)

References 3 publications

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“…Moreover, the growth after exposure to chilling is satisfactorily responsive to the effect of growing degree hours (GDH) (Swartz & Powell 1981;Lang 1987;Cesaraccio et al 2004Cesaraccio et al , 2006Atkinson et al 2013). Forcing Fragaria after a short period of dormancy influences not only the vegetative growth but also the floral capacity (Piringer & Scott 1964;Kronenberg & Wassenaar 1972). This could probably explain the reason for the earlier initiation of flowering in plants that received more chilling than those with no chilling.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Chilling and Accumulative Photo-Thermal Units on Flowering of Strawberry (Fragaria × ananassa Duch.)

Al-Madhagi

Al-Munibary

Al-Doubibi

2018

Journal of Horticultural Research

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The influence of chilling period hours and accumulative photo-thermal unit at different base temperatures, 10, 11, 13, 15, and 18 °C, on the flowering of strawberry was examined in Sana’a University-Yemen during two seasons: 2006 and 2007. The randomized complete block design (RCBD) field experiment was designed with 5 chilling hours (CHs) periods (0, 360, 750, 1080, and 1440 CHs under 2 ± 1 °C), with four replicates each. Accumulative photo-thermal unit (PTU) was calculated for every treatment at different base temperatures for two stages: (i) from planting date to the flower opening (THA) and (ii) from planting date until the end of 2 months (THB). The results revealed that the plants treated with 1080 h of chilling produced flowers with about 55.12% and 61.97% earlier when compared with control (without chilling) in both the seasons, respectively. Stepwise multiple regression analysis showed that both CHs and the accumulative PTU THA13 (in the first season) and CH plus THA10 (in the second season) have significant effect on days until flower opening, in which the majority effect was related to the chilling period. The effect of chilling period and accumulative PTU at 18 °C (THB18) had s significant influence (p < 0.05) on the number of early flower per plant, with about r2 = 0.250 and r2 = 0.536 in both the seasons, respectively, and r2 = 0.531 and r2 =0.740 for the total effect of both CH and THB18, respectively. However, the exposure of plants to the long period of chilling (1080 and 1440 h) led the plants to produce runners and break up the flowering stage after 9 and 11 weeks in both the seasons, respectively. Meanwhile, plants that received 360-h chilling produced significantly highest (p < 0.05) total number of flowers (24.83 per plant), with about 71.2% higher than that produced by control plants. Moreover, in the second season, plants treated with 750-h chilling produced the significantly higher total number of flowers per plant, with about 50.3% higher than that of the control. Meanwhile, the 360-h and 750-h chilling periods have similar effect on the number of flowers per plant in the second season. The result showed that the starch level in the crown significantly positively correlated with the days to flower opening (r2 = 0.415, p = 0.05) and negatively correlated with the number of early flower (r2 = 0.587, p = 0.01). The data from this study might be used for the management of strawberry production.

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Section: Discussionmentioning

confidence: 99%

“…Furthermore, large variation in chilling requirement exists for F. × ananassa adapted to different climatic regions (Darrow 1955;Kronenberg & Wassenaar 1972). That may explain the reason for the flowering stage after 9 and 11 weeks from plants that received 1080-and 1440-h chilling treatments.…”

Section: Discussionmentioning

confidence: 99%

Effect of Chilling and Accumulative Photo-Thermal Units on Flowering of Strawberry (Fragaria × ananassa Duch.)

Al-Madhagi

Al-Munibary

Al-Doubibi

2018

Journal of Horticultural Research

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“…Although considerable evidence exists for regional adaptations of physiological traits in North American strawberry cultivars (Arney, 1956;Darrow and Waldo, 1934;Guttridge, 1953;Kronenberg and Wassenaar, 1972), information about production traits is usually available only for cultivars tested in a rather narrow range of environments. The extent to which cultivars are physiologically adapted has ramifications for production efficiency, but direct comparisons of economically important characters may reveal more about the potential benefits of, and obstacles to, germplasm exchange.…”

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confidence: 99%

Performance of North American Strawberry Cultivars under Conditions Mimicking California Production Systems

Rariden¹,

Shaw²

1994

jashs

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Runner plants from 16 strawberry (Fragaria ×ananassa Duch.) cultivars were grown using annual Mediterranean production systems to test for differences in productivity, performance traits, and vegetative growth attributes. Genotypes were included from germplasm adapted to four geographic regions: California and northwestern, northeastern, and mid-Atlantic or southeastern United States. The California genotypes were divided further into day-neutral and June-bearing categories. With these treatments, California cultivars had significantly larger plants and grew more rapidly during the fall and winter, had larger fruit, and produced at least twice the quantity of fruit of cultivars from the other regions. Variance components due to region explained 64% and 26% of the phenotypic variance for early and total yield, respectively, whereas differences among cultivars within regions explained 12% and 7% of the variance for these traits. Cultivars from all regions had significantly larger plants and were more productive when treated with 3 weeks of artificial vernalization. However, region × vernalization effects were nonsignificant for all traits, a result suggesting that selection in Mediterranean environments has not adapted germplasm specifically for low vernalization conditions.

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“…Dormancy induction depends on photoperiod and temperature decreases in the late summer (Darrow and Waldo 1933;Arney 1955;Kronenberg and Wassenaar 1972). Morphologically, this is revealed by a reduction in leaf size and petiole length shortening (Chouard 1946;Durner and Poling 1987).…”

Section: Dormancy Is Observed In Many Plants In Temperate Zonesmentioning

confidence: 99%

Determination of the growth potential of strawberry plants (Fragaria × ananassa Duch.) by morphological and nucleotide measurements in relation to chilling

Robert¹,

Pétel²,

Risser³

et al. 1997

Can. J. Plant Sci.

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Robert, F., Pétel, G., Risser, G. and Gendraud, M. 1997. Determination of the growth potential of strawberry plants (Fragaria × ananassa Duch.) by morphological and nucleotide measurements in relation to chilling. Can. J. Plant Sci. 77: 127-132. Early strawberry fruit production requires that non-dormant strawberry plants be covered during winter. Two methods wre used to study the breaking of dormancy of Elsanta strawberry plants following chilling at temperatures below 8°C. First, a morphological test using the petiole lengths of plants transferred from a nursery to a growth chamber was used. Second, the nucleotide contents before and after incubation of samples in an adenosine solution were measured by bioluminescence. The results show that these two methods can reveal changes in the growth potential of strawberry plants, and, therefore, the release from dormancy.Key words: Dormancy, strawberry plant, nucleotide, growth potential, Fragaria Robert, F., Pétel, G., Risser, G. et Gendraud, M. 1997. Détermination par des mesures morphologique et nuclétodique, du potentiel de croissance de fraisiers (Fragaria × ananassa Duch.) refroidis. Can. J. Plant Sci. 77: 127-132. La production forcée de fraises requiert de couvrir les fraisiers non dormants au cours de l'hiver. Deux méthodes ont été utilisées pour déterminer la levée de dormance de fraisiers de la variété Elsanta après exposition à des températures inférieures à 8°C. La première fut la mise au point d'un test morphologique par la mesure des longueurs de pétioles de fraisiers transférés d'une pépinière à une enceinte climatisée. La deuxième méthode consista en la mesure par bioluminescence des teneurs en nucléotides avant et après incubation d'échantillons sur adénosine. Les résultats montrent que ces deux méthodes permettent d'évaluer les changements du potentiel de croissance des fraisiers et ainsi la levée de la dormance.

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Dormancy and chilling requirement of strawberry varieties for early forcing

Cited by 17 publications

References 3 publications

Effect of Chilling and Accumulative Photo-Thermal Units on Flowering of Strawberry (Fragaria × ananassa Duch.)

Effect of Chilling and Accumulative Photo-Thermal Units on Flowering of Strawberry (Fragaria × ananassa Duch.)

Performance of North American Strawberry Cultivars under Conditions Mimicking California Production Systems

Determination of the growth potential of strawberry plants (Fragaria × ananassa Duch.) by morphological and nucleotide measurements in relation to chilling

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