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Effects of Grafting on Yield and Fruit Quality of Specialty
Melons (Cucumis melo)
njing Guan and Xin Zhao
Horticultural Sciences Department, University of Florida, Gainesville, FL 32611
Introduction
Effects of grafting on melon fruit size
1. Specialty melons are marketed for their superior fruit flavor and outstanding
Treatment
Average fruit
Treatment
Average fruit
eating quality. Demand for specialty melons in the U.S. market is
continuously increasing. However, there is a lack of good disease resistances

weight (kg)
weight (kg)
in many cultivars.
Fumigation
Fumigation
2. Grafting melons onto hybrid squash rootstock improved plant resistance to
Fumigated plot 1.60
b Fumigated plot 1.49
soil-borne diseases and fruit yield.
Non-fumigated plot
Non-fumigated plot
3. Planting density of grafted melon plants may be reduced compared with non-
Grafting
Grafting
grafted plants because of vigorous root systems and potential enhancement
of water and nutrient uptake. Reducing planting density may also help
Ar/St 1.70
HY/St 1.49
decrease costs of grafted melon production.
/St_RD 1.79
HY/St_RD 1.53
4. Previous studies yielded mixed results about fruit quality of grafted melons.
Limited information is available regarding the effect of hybrid squash
rootstock on fruit quality of specialty melons.

LS-Means for Trt*harvest wi
LS-Means for Trt*harvest with 95% Confidence Limits
ight LS-M
‘Arava’
‘Honey Yellow’
Middle harvest
Early harvest
Late harvest
Early harvest
Middle harvest
Late harvest
‘Arava’
‘Honey Y
ellow’
Materials and Methods
1. ‘Arava’ (Ar) and ‘Honey Yellow’ (HY) were grafted onto hybrid squash
rootstock ‘Strong Tosa’ (St).
Effects of grafting on total soluble solids content (SSC)
2. The experiment was arranged in a split-plot design with fumigation as the
main-plot factor, grafted plants (Ar/St, HY/St) grown at standard spacing and
Treatment
SSC of ‘Arava’
Treatment
SSC of ‘Honey
reduced in-row spacing (Ar/St_RD, HY/St_RD), and non-grafted control plants
Yellow’
(NAr, NHY) grown at standard spacing as sub-plot treatments. There were 8
Fumigation
Fumigation
plants per treatment per replication, 5 replications.
Fumigated plot 9.03
Fumigated plot 14.17
3. Plants were transplanted on 29 March, 2012. Harvests were conducted from
Non-fumigated plot
Non-fumigated plot
21 May, 2012 to 19 June, 2012, two to three times a week. ‘Arava’ was
harvested at full-slip stage, ‘Honey Yellow’ was harvested based on color

Grafting
Grafting
NHY 13.89
4. Fruit quality was evaluated during early, middle, and late harvests. Three
typical fruit per treatment per replication were selected to measure fruit
HY/St 14.06
LS-Means for Trt*harvest
weight and total soluble solids content (SSC).
Ar/St_RD 8.70
HY/St_RD 13.61
5. SAS version 9.2 was used for data analysis.
LS-Means for Trt*harvest
LS-Means for Trt*harvest
LS-Means for Tr
LS-Means for Trt*harvest wi
t*harv Con
5 replications
Non-fumigated beds
TSS LS-Means
Fumigated beds
Early harvest
Middle harvest
Late harvest
In-row spacing
‘Honey Yellow’
Standard: 0.91 m, RD: 1.22 m
Early harvest
Middle harvest
Late harvest
Early harvest
Middle harvest
Late harvest
Grafted transplants using
Field plot layout
Fruit color corresponding to °Brix value
‘Arava’
‘Honey Ye llow’
one-cotyledon method
above 16 was used for harvest
Effects of grafting on melon fruit yields
Conclusions and Discussion
Total yield
Marketable yield
Treatment
(kg·ha-1)
(kg·ha-1)
1. At the reduced planting density, grafted ‘Arava’ achieved similar yields as non-
grafted plants grown at the standard spacing. However, reducing planting density of
‘Arava’
grafted ‘Honey Yellow’ significantly decreased yields. Results indicated that the
NAr 62218
planting density effect varied with the scion used.
/St 73105
Ar/St_RD 68091
2. Grafting reduced fruit SSC of ‘Arava’, but it showed little influence on fruit quality of
‘Honey Yellow’
‘Honey Yellow’. The differential responses observed may be related to different
growth patterns of muskmelons and honeydews. Because sugars accumulate in a

NHY 60106
shorter period in muskmelons compared to honeydew fruit, muskmelon fruit quality
may be more likely to be affected by vigorous rootstock.
HY/St_RD 49438

Source: http://www.vegetablegrafting.org/wp/wp-content/uploads/2012/11/Wenjing-Guan_poster.pdf

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