Abstract
In Italy, the evaluation of rootstocks is supported by the Ministry of Agriculture and carried out in a network of trials along the Country. This study evaluated growth and yield performance of ‘Big Top’ nectarine and ‘Rome Star’ peach grafted on six rootstocks of different origin and vigor, namely GF677 (the most widespread in Italy), Garnem, Adesoto, RootPac®20, RootPac®40, and RootPac®90, in three different locations, Castelvetrano (Sicily), Forli and Cesena (Emilia-Romagna). Yield, number of fruits, trunk cross-sectional area (TCSA), average fruit weight, flesh firmness, soluble solids content (SSC) and titratable acidity (TA) were determined at the third leaf (2015). In all sites, trees on GF677, Garnem, and RootPac®90 were the most vigorous, and trees on RootPac®40 (-40 to -51% of GF677 TCSA) and RootPac®20 (-48 to -60% of GF677 TCSA) the least vigorous. In Castelvetrano, trees on Adesoto and RootPac®20 matured fruit slightly earlier than trees on other rootstocks; trees on RootPac®40 were the most productive and yield efficient, followed closely by trees on Adesoto and RootPac®20, the latter exhibiting the highest SSC; yield differences were mainly due to differences in fruit weight rather than in fruit number. In Emilia-Romagna, yield was directly related to tree vigor, with trees on GF677 being the most productive. In this case, yield differences were mainly due to differences in the number of fruits. Yield efficiency was also higher in the most vigorous trees, with the only exception of RootPac®40, which combined a size-controlling effect with high yield efficiency and large fruit size. While GF677 confirmed a good yield performance, RootPac®40 seems promising for high-density plantings, as it associates high yield efficiency and reduced tree vigor.
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Claims 16
Claim · model-written summary
GF677, Garnem and RootPac 90 produced the most vigorous trees across sites.
- Taxon
- peach
Prunus persicat0 - Outcome
- most vigorouse0
- Direction
- most vigorouse0
- Setting
- all sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“In all sites, trees on GF677, Garnem, and RootPac®90 were the most vigorous”
t0“Prunus rootstocks for peach”
Claim · model-written summary
RootPac 40 trees had the least vigor, with TCSA 40–51% below GF677.
- Taxon
- peach
Prunus persicat0 - Material
- RootPac®40e0
- Outcome
- TCSAe0
- Direction
- least vigorouse0
- Value
- -40 to -51%e0
- Comparator
- GF677e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“trees on RootPac®40 (-40 to -51% of GF677 TCSA) and RootPac®20 (-48 to -60% of GF677 TCSA) the least vigorous.”
t0“Prunus rootstocks for peach”
Claim · model-written summary
RootPac 20 trees had the least vigor, with TCSA 48–60% below GF677.
- Taxon
- peach
Prunus persicat0 - Material
- RootPac®20e0
- Outcome
- TCSAe0
- Direction
- least vigorouse0
- Value
- -48 to -60%e0
- Comparator
- GF677e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“trees on RootPac®40 (-40 to -51% of GF677 TCSA) and RootPac®20 (-48 to -60% of GF677 TCSA) the least vigorous.”
t0“Prunus rootstocks for peach”
Claim · model-written summary
At Castelvetrano, Adesoto trees matured fruit slightly earlier than other rootstocks.
- Taxon
- peach
Prunus persicat0 - Material
- Adesotoe0
- Outcome
- matured fruite0
- Direction
- slightly earliere0
- Comparator
- other rootstockse0
- Setting
- Castelvetranoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“In Castelvetrano, trees on Adesoto and RootPac®20 matured fruit slightly earlier than trees on other rootstocks”
t0“Prunus rootstocks for peach”
Claim · model-written summary
At Castelvetrano, RootPac 20 trees matured fruit slightly earlier than other rootstocks.
- Taxon
- peach
Prunus persicat0 - Material
- RootPac®20e0
- Outcome
- matured fruite0
- Direction
- slightly earliere0
- Comparator
- other rootstockse0
- Setting
- Castelvetranoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“In Castelvetrano, trees on Adesoto and RootPac®20 matured fruit slightly earlier than trees on other rootstocks”
t0“Prunus rootstocks for peach”
Claim · model-written summary
At Castelvetrano, RootPac 40 trees were most productive and yield efficient.
- Taxon
- peach
Prunus persicat0 - Material
- RootPac®40e0
- Outcome
- productive and yield efficiente0
- Direction
- moste0
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“trees on RootPac®40 were the most productive and yield efficient”
t0“Prunus rootstocks for peach”
Claim · model-written summary
At Castelvetrano, Adesoto and RootPac 20 followed RootPac 40 closely in productivity and yield efficiency.
- Taxon
- peach
Prunus persicat0 - Outcome
- productive and yield efficiente1
- Direction
- followed closelye0
- Comparator
- RootPac®40e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“followed closely by trees on Adesoto and RootPac®20”
e1“trees on RootPac®40 were the most productive and yield efficient”
t0“Prunus rootstocks for peach”
Claim · model-written summary
At Castelvetrano, RootPac 20 had the highest soluble solids content.
- Taxon
- peach
Prunus persicat0 - Material
- RootPac®20e0
- Outcome
- SSCe0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“RootPac®20, the latter exhibiting the highest SSC”
t0“Prunus rootstocks for peach”
Claim · model-written summary
At Castelvetrano, yield differences chiefly reflected fruit weight rather than fruit number.
- Taxon
- peach
Prunus persicat0 - Organ / stage
- fruite0
- Outcome
- yield differencese0
- Qualifier
- fruit weight rather than in fruit numbere0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“yield differences were mainly due to differences in fruit weight rather than in fruit number”
t0“Prunus rootstocks for peach”
Claim · model-written summary
In Emilia-Romagna, yield was directly related to tree vigor.
- Taxon
- peach
Prunus persicat0 - Outcome
- yielde0
- Qualifier
- tree vigore0
- Setting
- Emilia-Romagnae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“In Emilia-Romagna, yield was directly related to tree vigor”
t0“Prunus rootstocks for peach”
Claim · model-written summary
In Emilia-Romagna, GF677 trees were most productive.
- Taxon
- peach
Prunus persicat0 - Material
- GF677e0
- Outcome
- most productivee0
- Direction
- most productivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“trees on GF677 being the most productive”
t0“Prunus rootstocks for peach”
Claim · model-written summary
In Emilia-Romagna, yield differences were mainly due to fruit number.
- Taxon
- peach
Prunus persicat0 - Organ / stage
- fruitse0
- Outcome
- yield differencese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“yield differences were mainly due to differences in the number of fruits”
t0“Prunus rootstocks for peach”
Claim · model-written summary
Yield efficiency was higher in the most vigorous trees.
- Taxon
- peach
Prunus persicat0 - Material
- treese0
- Outcome
- Yield efficiencye0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Yield efficiency was also higher in the most vigorous trees”
t0“Prunus rootstocks for peach”
Claim · model-written summary
RootPac 40 combined reduced tree size with high yield efficiency and large fruit.
- Taxon
- peach
Prunus persicat0 - Material
- RootPac®40e0
- Outcome
- high yield efficiency and large fruit sizee0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“RootPac®40, which combined a size-controlling effect with high yield efficiency and large fruit size”
t0“Prunus rootstocks for peach”
Claim · model-written summary
GF677 had good yield performance.
- Taxon
- peach
Prunus persicat0 - Material
- GF677e0
- Outcome
- good yield performancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“GF677 confirmed a good yield performance”
t0“Prunus rootstocks for peach”
Claim · model-written summary
The authors considered RootPac 40 promising for high-density planting because of high yield efficiency and reduced vigor.
- Taxon
- peach
Prunus persicat0 - Material
- RootPac®40e0
- Outcome
- high-density plantingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“RootPac®40 seems promising for high-density plantings, as it associates high yield efficiency and reduced tree vigor.”
t0“Prunus rootstocks for peach”