Field Studies of Achilles as a Cut Flower: Longevity, Spacing, and Cultivar Response

Yield components of 4 anthurium cultivars over a 2 year harvest period were determined. The varieties are `Ozaki' (red color-OZ), `Nitta' (orange-NT), `Kozohara' (dark red-KZ) and `Marian Seefurth' (pink-MS). The herbicide treatments are: diuron (1.1 kg ai/ha) every 3 months (DN); granular formulation of oxyfluorfen (2%) and oryzalin (1%) (3.4 kg ai/ha) in an alternating 3 month cycle with diuron (1.1 kg ai/ha) (OO). Black polypropylene mulch (PM) is the non-chemical control treatment. Yield components include: total cut flower yield, mean stem length and mean flower size (spathe width × length). Total flower yield was not significantly affected by weed control treatments. Yield ranking was: MS>KZ=NT>OZ. A significant interaction was recorded for stem length and flower size. OZ stem length was unaffected by weed control treatments while the others showed variations dependent on treatments. KZ and OZ flower size was not affected by weed control treatments, however, herbicide treatments did reduce flower size of MS and NT. Weed control ranking was: PM=00.>DI.

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High-pressure Sodium Radiation during Off-peak Nighttimes Increases Cut Rose Production and Quality

HortScience ◽

10.21273/hortsci.31.6.938 ◽

1996 ◽

Vol 31 (6) ◽

pp. 938-940

Author(s):

Douglas A. Hopper

Keyword(s):

High Pressure ◽

Rosa Hybrida ◽

Stem Length ◽

Cut Flower ◽

Fresh Weight ◽

Flower Yield ◽

Cut Flower Yield ◽

One Year ◽

Cut Rose

One-year-old plants of four cut rose (Rosa hybrida L.) cultivars were grown under either natural or supplemental irradiance for 4 months during the winter in Colorado. Supplemental irradiance with high-pressure sodium (HPS) lamps was supplied at 100 μmol·m–2·s–1 for 10 h each night during off-peak electrical use periods. Total cut flower yield, stem length, and fresh weight of individual flowers were recorded. The number of flowers produced and fresh weight increased for all cultivars under the supplemental irradiance treatment. Flower count, stem length, and fresh weight showed significant differences among the four 4-week production periods; production differences were promoted through pinches of two stems per plant to time for holiday peaks. When production was highest, stem length and fresh weight were lower, most likely due to redistribution of the limited carbohydrate pool during the winter.

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INHERITANCE OF FLOWERING TIME AND ITS APPLICATION FOR INDIRECT SELECTION IN THE DAVIS POPULATION OF GERBERA

HortScience ◽

10.21273/hortsci.25.11.1357 ◽

1990 ◽

Vol 25 (11) ◽

pp. 1357F-1358

Author(s):

Yiran Yu ◽

James Harding ◽

Thomas Byrne

Keyword(s):

Flowering Time ◽

Genetic Correlations ◽

Indirect Selection ◽

Cut Flower ◽

Narrow Sense ◽

Narrow Sense Heritability ◽

Components Of Variance ◽

Genetic Components ◽

Flower Yield ◽

Cut Flower Yield

Genetic components of variance and heritability of flowering time were estimated for five generations of the Davis Populationof Gerbera hybrids, Composite, Estimates of narrow-sense heritability averaged 0.50 and broad-sense heritability averaged 0.77 using the NCII design. Narrow-sense heritability was also estimated with two models of parent-offspring regression, resulting in average heritability of 0.49 and 0.51. Estimates of components of variance indicated that the major genetic effect controlling flowering time is additive. However, the dominance component accounted for 28% of the total variance; the environmental component was only 23%. Flowering time is negatively correlated with cut-flower yield. The phenotypic coefficient was –0.34; genetic correlations were –0.47 when estimated from the NCII design, and –0.72 when estimated from the parent-off-spring method. A practical model was constructed to assess the efficiency of indirect selection for cut-flower yield using flowering time as a marker trait. The advantages of indirect selection accruing from increased population size and reduced generation time are discussed.

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Vernalization Accelerates Flowering of Lysimachia clethroides Duby

HortScience ◽

10.21273/hortsci.33.3.508b ◽

1998 ◽

Vol 33 (3) ◽

pp. 508b-508

Author(s):

Pamela M. Lewis ◽

Alan M. Armitage ◽

Jim M. Garner

Keyword(s):

Stem Diameter ◽

Stem Length ◽

Cut Flower ◽

Bud Formation ◽

Flower Production ◽

Sphagnum Peat ◽

Potting Media ◽

Lysimachia Clethroides ◽

Shoot Emergence

The effect of vernalization method and duration on off-season cut flower production of Lysimachia clethroides Duby was examined. Rhizomes harvested in October were cooled for 0, 4, 6, 8, 10 or 12 weeks at 4 ± 1 °C in crates with unmilled sphagnum peat or in 3.75-L pots with potting media prior to forcing in a warm greenhouse. After 6 or more weeks of cooling, shoots emerged from crate-cooled rhizomes in higher percentages than from pot-cooled rhizomes. However, only the duration of cooling, not the method, affected the rate of shoot emergence, visible bud formation and anthesis of the first bud in the raceme. As cooling increased from 0 to 12 weeks, the greenhouse days required for shoot emergence, visible bud formation and anthesis decreased linearly. The number of flowering flushes and flowering stems varied quadratically with cooling duration, and the highest yields occurred when rhizomes received between 4 and 10 weeks of cooling. As the number of successive flowering flushes increased, the stem length increased linearly while the stem diameter decreased linearly. High numbers of flowers were produced rapidly after 10 weeks of cooling.

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Effects of inbreeding on cut-flower yield in gerbera

Euphytica ◽

10.1007/bf00025428 ◽

1995 ◽

Vol 81 (2) ◽

pp. 157-161 ◽

Cited By ~ 3

Author(s):

H. Huang ◽

J. Harding ◽

T. Byrne ◽

T. Famula

Keyword(s):

Cut Flower ◽

Flower Yield ◽

Cut Flower Yield

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NITROGEN LEACHING LOSSES FROM CONTAINER-GROWN ROSES.

HortScience ◽

10.21273/hortsci.27.6.583a ◽

1992 ◽

Vol 27 (6) ◽

pp. 583a-583 ◽

Cited By ~ 2

Author(s):

Raul I. Cabrera ◽

Richard Y. Evans ◽

J. L. Paul

Keyword(s):

Nitrogen Leaching ◽

N Leaching ◽

Leaching Losses ◽

Yield And Quality ◽

Flower Yield ◽

Use Efficiency ◽

Leaching Fraction ◽

Cut Flower Yield ◽

One Year ◽

Nutrient Solutions

Nitrogen leaching losses of 21, 40 and 49% were measured from container-grown `Royalty' roses irrigated for one year with nutrient solutions containing 77, 154 and 231 mg N/l. There were no significant differences in number of flowers per plant or dry matter per plant. The N present in the harvested flowers accounted for 43, 27 and 17% of the N applied for the 77, 154 and 231 mg N/l treatments, respectively. Plants receiving 154 mg N/l at leaching fractions of 0.1, 0.25 and 0.5 had corresponding N leaching losses of 22, 38 and 56%. In this experiment, however, the 0.5 leaching fraction produced yields significantly higher than those of the 0.1 and 0.25 treatments. The N recovered in the harvested flowers accounted for 28, 25 and 19% of that applied to the 0.1, 0.25 and 0.5 treatments, respectively. The results of these studies suggest that modifications in current irrigation and fertilization practices of greenhouse roses would result in a considerable reduction of N leaching losses and enhance N fertilizer use efficiency, without loss of cut flower yield and quality.

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INHERITANCE OF FLOWERING TIME AND ITS APPLICATION FOR INDIRECT SELECTION IN THE DAVIS POPULATION OF GERBERA

HortScience ◽

10.21273/hortsci.25.11.1357f ◽

1990 ◽

Vol 25 (11) ◽

pp. 1357f-1358

Author(s):

Yiran Yu ◽

James Harding ◽

Thomas Byrne

Keyword(s):

Flowering Time ◽

Genetic Correlations ◽

Indirect Selection ◽

Cut Flower ◽

Narrow Sense ◽

Narrow Sense Heritability ◽

Components Of Variance ◽

Genetic Components ◽

Flower Yield ◽

Cut Flower Yield

Genetic components of variance and heritability of flowering time were estimated for five generations of the Davis Populationof Gerbera hybrids, Composite, Estimates of narrow-sense heritability averaged 0.50 and broad-sense heritability averaged 0.77 using the NCII design. Narrow-sense heritability was also estimated with two models of parent-offspring regression, resulting in average heritability of 0.49 and 0.51. Estimates of components of variance indicated that the major genetic effect controlling flowering time is additive. However, the dominance component accounted for 28% of the total variance; the environmental component was only 23%. Flowering time is negatively correlated with cut-flower yield. The phenotypic coefficient was –0.34; genetic correlations were –0.47 when estimated from the NCII design, and –0.72 when estimated from the parent-off-spring method. A practical model was constructed to assess the efficiency of indirect selection for cut-flower yield using flowering time as a marker trait. The advantages of indirect selection accruing from increased population size and reduced generation time are discussed.

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