Photosynthetic parameters and cut-flower yield of rose ‘Eurored’ (H.T.) are adversely affected by mild water stress irrespective of substrate composition

2010 ◽  
Vol 126 (3) ◽  
pp. 390-394 ◽  
Author(s):  
Androniki Bolla ◽  
Demetrios Voyiatzis ◽  
Magdalene Koukourikou-Petridou ◽  
Dora Chimonidou
Keyword(s):  
Water Stress ◽  
Photosynthetic Parameters ◽  
Cut Flower ◽  
Substrate Composition ◽  
Flower Yield ◽  
Cut Flower Yield ◽  
Mild Water Stress

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

HortScience ◽  
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.

scholarly journals Photosynthetic parameters and growth in seedlings of Bertholletia excelsa and Carapa guianensis in response to pre-acclimation to full sunlight and mild water stress

2014 ◽  
Vol 44 (1) ◽  
pp. 67-77 ◽  
Author(s):  
Gracilene Fernandes da Costa Azevedo
Keyword(s):  
Water Stress ◽  
Higher Plants ◽  
Field Capacity ◽  
Outdoor Exposure ◽  
Photosynthetic Parameters ◽  
Bertholletia Excelsa ◽  
Full Sunlight ◽  
Carapa Guianensis ◽  
Light Levels ◽  
Mild Water Stress

Light and water are important factors that may limit the growth and development of higher plants. The aim of this study was to evaluate photosynthetic parameters and growth in seedlings of Bertholletia excelsa and Carapa guianensis in response to pre-acclimation to full sunlight and mild water stress. I used six independent pre-acclimation treatments (0, 90 (11h15-12h45), 180 (10h30-13h30), 360 (09h00-15h00), 540 (07h30-16h30) and 720 min (06h00-18h00)) varying the time of exposure to full sunlight (PFS) during 30 days, followed by whole-day outdoor exposure for 120 days. Before PFS, the plants were kept in a greenhouse at low light levels (0.8 mol m-2 day-1). The PFS of 0 min corresponded to plants constantly kept under greenhouse conditions. From the beginning to the end of the experiment, each PFS treatment was submitted to two water regimes: moderate water stress (MWS, pre-dawn leaf water potential (ΨL) of -500 to -700 kPa) and without water stress (WWS, ΨL of -300 kPa, soil kept at field capacity). Plants under MWS received only a fraction of the amount of water applied to the well-watered ones. At the end of the 120-day-period under outdoor conditions, I evaluated light saturated photosynthesis (Amax), stomatal conductance (g s), transpiration (E) and plant growth. Both Amax and g s were higher for all plants under the PFS treatment. Stem diameter growth rate and Amax were higher for C. guianensis subjected to MWS than in well-watered plants. The contrary was true for B. excelsa. The growth of seedlings was enhanced by exposure to full sunlight for 180 minutes in both species. However, plants of B. excelsa were sensitive to moderate water stress. The higher photosynthetic rates and faster growth of C. guianensis under full sun and moderate water stress make this species a promissory candidate to be tested in reforestation programs.

Cut Flower Yield and Quality Response to Cutting Height at Harvest of Rose ‘Yellow King’ in Hydroponic Culture

2015 ◽  
Vol 23 (2) ◽  
pp. 98-103
Author(s):  
Dong Chun An ◽  
◽  
Jin Gi Kim ◽  
Ju Chean Hwang ◽  
Young Don Chin ◽  
...  
Keyword(s):  
Hydroponic Culture ◽  
Cut Flower ◽  
Yield And Quality ◽  
Flower Yield ◽  
Cut Flower Yield ◽  
Quality Response ◽  
Cutting Height

Effects of inbreeding on cut-flower yield in gerbera

Euphytica ◽  
1995 ◽  
Vol 81 (2) ◽  
pp. 157-161 ◽  
Author(s):  
H. Huang ◽  
J. Harding ◽  
T. Byrne ◽  
T. Famula
Keyword(s):  
Cut Flower ◽  
Flower Yield ◽  
Cut Flower Yield

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

HortScience ◽  
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.

Cut Flower Yield and Quality of Cymbidium According to Different Cultivation Periods and Pot Sizes

2016 ◽  
Vol 24 (3) ◽  
pp. 212-216
Author(s):  
Hye Ryun An ◽  
◽  
Oh Keun Kwon ◽  
Pue Hee Park ◽  
Pil Man Park ◽  
...  
Keyword(s):  
Cut Flower ◽  
Yield And Quality ◽  
Flower Yield ◽  
Cut Flower Yield

Estimation of heritability and response to selection for cut-flower yield in gerbera

Euphytica ◽  
1981 ◽  
Vol 30 (2) ◽  
pp. 313-322 ◽  
Author(s):  
James Harding ◽  
Thomas G. Byrne ◽  
Robert L. Nelson
Keyword(s):  
Response To Selection ◽  
Cut Flower ◽  
Flower Yield ◽  
Selection For ◽  
Cut Flower Yield

scholarly journals Effect of gibberellic acid on flowering and cut flower yield in gerbera under protected condition

2014 ◽  
Vol 9 (2) ◽  
pp. 404-407 ◽  
Author(s):  
R.V. CHAUHAN ◽  
K.P. KAVA ◽  
V.J. BABARIYA ◽  
P.B. PANSURIA ◽  
A.B. SAVALIYA
Keyword(s):  
Gibberellic Acid ◽  
Cut Flower ◽  
Flower Yield ◽  
Cut Flower Yield
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