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Large-scale ‘Hamlin’ and ‘Valencia’ Rootstock Trials
Dr. Bill Castle – Dr. Fred Gmitter - Dr. Jude Grosser
December 7, 2018CREC Citrus Plant Improvement
Large-scale ‘Hamlin’ and ‘Valencia’ Rootstock Trials - Description
There are 4 replicated trials, each ca. 10-acre involving a total of about 17,000 trees. The objective is to determine the performance of a broad range of rootstocks with ‘Hamlin’ or ‘Valencia’ scion on a typical Ridge (Lake Wales) or flatwoods site (Basinger). The trials, planted in 2015 at 8 x 22 ft., include numerous diploid and tetraploid rootstocks from the UF/CREC breeding program along with the best selections from the Forner breeding program in Spain, the C-Series rootstocks from California, popular USDA rootstocks, and commercial rootstocks for comparison, a total of 58 rootstock candidates, all amenable to seed propagation. The objective is to identify suitable scion/rootstock combinations for each site type with emphasis on combinations that will generate earlier returns. [Dr. Ute Albrecht (SWFREC) has joined the CREC team to assist with data collection.]
CREC Citrus Plant Improvement
Large-scale ‘Hamlin’ and ‘Valencia’ Rootstock Trials
Site 1: Basinger Grove
Site 2: Camp Mack Grove
Scion - Rootstocks:
Hamlin (58 rootstocks)
Valencia (53 rootstocks)
Date Planted: September 2015
Design: RCBD, 10 replications [6 replications used for data analysis]
Plot size: 8 trees
Spacing: 8 x 22 ft.
Data Collected:
2016-17: Tree size, Tree Health Rating, Number of Fruit/tree
2017-18 : Tree size, Tree Health Rating, Number of Fruit/tree
CREC Citrus Plant Improvement
2017-18 Basinger Grove: ‘Hamlin’ Orange (Mean tree size rating, tree health rating and number of fruit per tree)
(Lykes Sweet Orange Rootstock Trial)
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
Rootstock [Total number of trees evaluated]
Tree Size Rating Tree Health Rating Number of Fruit/Tree
Tree Size Rating Scale0: Dead1: Little to no growth2: Some growth3: Average for field4: Above average5: Biggest tree in field
Tree Health Rating Scale0: Dead1: Heavy decline2: Some decline3: Average for field4: Above average5: No signs of HLB CREC Citrus Plant Improvement
2017-18 Camp Mack Grove: ‘Hamlin’ Orange (Mean Tree size rating, tree health rating and number of fruit per tree)
CREC Citrus Plant Improvement
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Rootstock [Total number of trees evaluated]
Tree Size Rating Tree Health Rating Number of Fruit/Tree
Tree Size Rating Scale0: Dead1: Little to no growth2: Some growth3: Average for field4: Above average5: Biggest tree in field
Tree Health Rating Scale0: Dead1: Heavy decline2: Some decline3: Average for field4: Above average5: No signs of HLB
2017-18 Basinger Grove: ‘Valencia’ Orange (Mean Tree Size Rating, Tree Health Rating and Number of Fruit per Tree)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
Rootstock [Total number of trees evaluated]
Tree Size Ratings Tree Health Ratings Number of Fruit/Tree
Tree Size Rating Scale0: Dead1: Little to no growth2: Some growth3: Average for field4: Above average5: Biggest tree in field
Tree Health Rating Scale0: Dead1: Heavy decline2: Some decline3: Average for field4: Above average5: No signs of HLB
CREC Citrus Plant Improvement
2017-18 Camp Mack Grove: ‘Valencia’ Orange (Mean Tree size, tree health rating and cumulative 2-year number of fruit per tree: 2016-17 & 2017-18)
0.0
10.0
20.0
30.0
40.0
50.0
60.0
Rootstock [Total number of trees evaluated]
Tree Size Rating Tree Health Rating Cum 2-year Number of Fruit/Tree
Tree Size Rating Scale0: Dead1: Little to no growth2: Some growth3: Average for field4: Above average5: Biggest tree in field
Tree Health Rating Scale0: Dead1: Heavy decline2: Some decline3: Average for field4: Above average5: No signs of HLB
CREC Citrus Plant Improvement
2017-18 Basinger Grove:‘Hamlin’ Orange Heat Map
Data collected from 2-year old trees
Med
High rating
Low rating
Medium rating
Heat Map InterpretationColor coding is used to better visualize the rating for tree health, number of fruit and tree size for ‘Hamlin’ orange on each of the rootstocks in this trial. A high (Best) rating is in blue and low (Worst) rating is in red. The other colors represent the values between high and low according to the color scale. For tree size, dark blue indicates a large tree, green a medium-sized tree and red a small tree.
CREC Citrus Plant Improvement
Nu
mb
er o
f Fr
uit
/Tre
e
6058 + 2071-02-2
Amb + Benton
Amb + Czo
B Sour
B11R4T18
B11R4T22
C-146
C-22
C-54C-57
UFR-6: Changsha + 50-7
Changsha + Benton
FA-13
FA-2344 [02034]
FA-31
FA-5
FA-5115
FA-5128
FA-517
FA-74UFR-17: Green 2
Green 3
Green 7
N40R1T18
N40R1T2
N40R1T26
N40R2T19
N40R2T21N40R2T24
N40R2T26
N40R3T26
N40R3T27
Orange 13
Orange 14
UFR-3: Orange 15
UFR-4: Orange 19
UFR-1: Orange 3
UFR-2: Orange 4
Sorp + Sh-991SWG
US-897
V-17
Wgft + 50-7
White 1
White 3
UFR-5: White 4
X-639
Tree
Hea
lth
Rat
ing
Tree
Siz
e R
atin
g
2017-18 Camp Mack Grove:‘Hamlin’ Orange Heat Map
Data collected from 2-year old trees6058 + 2071-02-2
Amb + Benton
Amb + Czo
B Sour
B11R4T18
B11R4T22
C-146
C-22
C-54
C-57
UFR-6: Changsha + 50-7
Changsha + Benton
Cleo
FA-13
FA-2344 [02034]
FA-31
FA-417
FA-5
FA-5115
FA-5128
FA-517
FA-74
UFR-17: Green 2
Green 3
Green 7
N40R1T18
N40R1T2
N40R1T26
N40R2T19
N40R2T21
N40R2T24
N40R2T26
N40R3T26
N40R3T27
Orange 13
Orange 14
UFR-3: Orange 15
UFR-4: Orange 19
UFR-1: Orange 3
UFR-4: Orange 4
Sorp + Sh-991
SWG
US 802
US 812
US 942
US-897
V-17
Wgft + 50-7
White 1
White 3
UFR-5: White 4
X-639
Tre
e S
ize
Rat
ing
Tre
e H
eal
th R
atin
g
Nu
mb
er
of
Fru
it/T
ree
Med
High rating
Low rating
Medium rating
Heat Map InterpretationColor coding is used to better visualize the rating for tree health, number of fruit and tree size for ‘Hamlin’ orange on each of the rootstocks in this trial. A high (Best) rating is in blue and low (Worst) rating is in red. The other colors represent the values between high and low according to the color scale. For tree size, dark blue indicates a large tree, green a medium-sized tree and red a small tree.
CREC Citrus Plant Improvement
6058 + 2071-02-2
Amb + Benton
Amb + Czo
B Sour
B11R4T18
B11R4T22
C-146
C-22
C-54
C-57
UFR-6: Changsha
+ 50-7
Changsha + Benton
FA-13FA-2344 [02034]
FA-31
FA-5115
FA-5128
FA-517
FA-5A
FA-74
UFR-17: Green 2
Green 3
Green 7
N40R1T18
N40R1T2
N40R1T25
N40R1T26
N40R2T19
N40R2T21N40R2T24
N40R2T26
N40R3T26
N40R3T27
Orange 13
Orange 14
UFR-3: Orange 15
UFR-4: Orange 19
UFR-1: Orange 3
UFR-2: Orange 4
Sorp + Sh-991SWG
US-897
V-17
Wgft + 50-7
White 1
White 3
UFR-5: White 4
X-639
2017-18 Basinger Grove:‘Valencia’ Orange Heat Map
Data collected from 2-year old trees
Med
High rating
Low rating
Medium rating
Heat Map InterpretationColor coding is used to better visualize the rating for tree health, number of fruit and tree size for ‘Valencia’ orange on each of the rootstocks in this trial. A high (Best) rating is in blue and low (Worst) rating is in red. The other colors represent the values between high and low according to the color scale. For tree size, dark blue indicates a large tree, green a medium-sized tree and red a small tree.
CREC Citrus Plant Improvement
Tree
Siz
e R
atin
g
Tree
Hea
lth
Rat
ing
Nu
mb
er o
f Fr
uit
/Tre
e
C-146 C-22FA-5A
US-897 N40R1T25C-54
White 1
UFR-4: Orange 19 C-57
V-17
Wgft + 50-7
6058 + 2071-02-2
N40R1T18
B11R4T18
B Sour
UFR-3: Orange 15
N40R2T21
N40R2T26
US 942
UFR-17: Green 2SWG
FA-13
UFR-1: Orange 3
FA-5128
Changsha + Benton
FA-74
FA-517N40R3T26
Green 3
N40R3T27
Green 7
B11R4T22
UFR-6: Changsha + 50-7
FA-31
X-639
UFR-5: White 4
Amb + Czo
FA-2344 [02034]
FA-5115
White 3UFR-2: Orange 4
Sorp + Sh-991
US 802
Orange 14
Morton
Orange 13
N40R1T26Amb + Benton
US 812
N40R2T24Kuharske
2017-18 Camp Mack Grove:‘Valencia’ Orange Heat Map
Data collected from 2-year old trees
Med
High rating
Low rating
Medium rating
Heat Map InterpretationColor coding is used to better visualize the rating for tree health, number of fruit and tree size for ‘Valencia’ orange on each of the rootstocks in this trial. A high (Best) rating is in blue and low (Worst) rating is in red. The other colors represent the values between high and low according to the color scale. For tree size, dark blue indicates a large tree, green a medium-sized tree and red a small tree.
CREC Citrus Plant Improvement
Nu
mb
er
of
Fru
it/
Tre
e
Tree
Hea
lth
Rat
ing
Tree
Siz
e R
atin
g