Graphs of Total Soluble Solids:Acid Ratio for
TDE Mandarin Hybrids
M. L. Roose and T. E. Williams
Department of Botany and Plant Sciences, University of California,
Riverside, CA 92521
•
•
•
•
•
Samples of 10-15 fruit per tree, 2-4 trees per location were sampled from 4-6
locations, returned to Riverside and juiced using a hand reamer. Samples
were collected from trees on various rootstocks, mostly Carrizo and C35
citranges.
Juice was analyzed for solids content using a refractometer and for total acid
(as citric acid) by titration at Riverside or in the Lindcove Fruit Analysis
Laboratory
Values plotted are the mean solids:acid ratio of all samples from each date.
Data values for samples collected in the same year are connected by solid
lines.
The dashed line was fit by linear regression using all datapoints, ignoring
year. The regression equation is shown in each graph.
Abbreviations: CVARS= Coachella Valley Agricultural Research Station, Indio,
California.
Solids:Acid of TDE2 at Santa Paula, CA
28
y = 0.0414x - 1520.6
R2 = 0.3692
20
16
2000
12
1999
1998
2001
8
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24
Solids:Acid of TDE2 at Valley Center, CA
28
y = 0.0844x - 3111.5
R2 = 0.7808
20
16
1999
2000
12
2001
1997
8
1998
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24
Solids:Acid of TDE2 at Ojai, CA
28
y = 0.0673x - 2475.7
R2 = 0.8235
20
1998
16
1999
1997
12
2001
8
2000
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24
Solids:Acid of TDE2 at Thermal, CA
28
y = 0.0721x - 2650.2
R2 = 0.8015
20
1998
16
2001
1999
12
8
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24
Solids:Acid of TDE2 at CVARS
28
y = 0.0833x - 3060.5
R2 = 0.7891
20
1998
16
1999
12
8
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24
Solids:Acid of TDE3 at Santa Paula, CA
28
y = 0.1017x - 3746.3
R2 = 0.6341
20
1999
2000
16
12
1998
8
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24
Solids:Acid of TDE3 at CVARS
28
y = 0.0806x - 2959.8
R2 = 0.7501
20
1999
16
2001
12
2000
8
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24
Solids:Acid of TDE3 at Lindcove, CA
28
y = 0.0735x - 2702.9
R2 = 0.8934
20
1998
1999
16
1997
12
2001
8
Sampling date
5/6
4/5
3/5
2/2
1/2
4
12/2
2000
11/1
Solids:Acids
24
Solids:Acid of TDE3 at Valley Center, CA
28
y = 0.0463x - 1700.5
R2 = 0.4875
20
1998
16
1997
12
1999
2001
8
2000
Sampling date
5/30
4/30
3/31
3/1
1/30
12/31
12/1
4
11/1
Solids:Acids
24
Solids:Acid of TDE3 at Orange Cove, CA
28
y = 0.0763x - 2808.9
R2 = 0.8148
20
1999
16
1997
1998
12
8
2000
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24
Solids:Acid of TDE3 at Ojai, CA
28
y = 0.0763x - 2805
R2 = 0.9077
20
1999
16
12
2001
2000
8
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24
1998
Solids:Acid of TDE4 at Santa Paula, CA
28
y = 0.0491x - 1804.5
R2 = 0.487
20
16
2000
12
1999
1998
8
2001
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24
Solids:Acid of TDE4 at Lindcove, CA
28
y = 0.0873x - 3212.6
R2 = 0.7903
20
1998
2001
16
1999
12
8
2000 1997
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24
Solids:Acid of TDE4 at Orange Cove, CA
28
y = 0.0799x - 2942.2
R2 = 0.7981
20
2000
16
1998
1997
12
1999
8
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24
Solids:Acid of TDE4 at Ojai, CA
28
y = 0.0619x - 2276.5
R2 = 0.7992
20
1998
16
1999
12
2001
8
2000
Sampling date
5/6
4/5
3/5
2/2
1/2
12/2
4
11/1
Solids:Acids
24