1. Authors names: Andrei Florin Tabacu
University of Agronomic Sciences and Veterinary Medicine of Bucharest
Faculty of Horticulture
International Student Symposium “Hortus Academicus”
March 29, 2019, Bucharest, Romania
Pomological caracterization of some hybrid selection paw paw fruit ( Asimina triloba Dunal )
Authors names: Andrei Florin Tabacu
Coordinator Professor: Prof. dr. Florin Stanică
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

2. Introduction
Asimina triloba, the pawpaw, paw paw, or paw-paw, among many regional names, is a small deciduous tree native to the eastern United States and Canada.
The fruits when matured has different sizes and shapes, the color deffers between light green and golden yellow.
The fruits of asimina have significant content in carbohydrates and fiber,vitamins B C, mineral elements P Mg K and essential acids.
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

3. Objective
Pomological caracterization of same hybrid selection paw paw fruit (Asimina triloba Dunal)

4. Materials and Methods Location of experience:
The experience is placed in the Didactic Campus of the Horticulture Departament behind the Horticulture University.
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

5. Methods:
Comparison between the nr. of buds, flowers and fruits
Fruits numbering
Nr. of fruits in a brunch/tree
Setting the maturation period
Production
Fruits measurement and analysis
Seeds measurement
Sensory analysis of fruits

6. TSS and Dry matter

7. Vitamin C

9. Results and discussions
Comparison between the nr. of buds, flowers and fruits:
To be able to determine the percentage of related fruits I had in experience 6 genotypes of those 26 genotypes from didactic campus.
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania

11. Fruits numbering
The fruits have been numbered for easier identification because we have several genotypes in experience whose fruits not deffers greatly from each other.

12. Nr. of fruits in a brunch/tree

13. 8 fruits
9 fruits

14. Maturation and harvesting of fruits:
The fruits have been maturated gradually and the harvesting it lasted for 2 months and a half :
R1P2
R1P7
R1P8

15. The fruits when matured have a light green, yellowish green or golden yellow depending of the genotypes.

16. Production
Nr. of fruits/tree
R1P6
R2P9

17. Production expressed in kg/tree
R1P10
R2P1

18. Fruits measurement 5.82 Genotype Average fruit weight g Height cm
Diameter 1 cm
Diameter 2 cm
R1P1
75.69
6.95
4.40
4.19
R1P2
116.59
8.11
5.12
4.84
R1P3
189.54
9.13
6.60
6.19
R1P4
147.61
7.94
5.71
5.34
R1P5
120.68
8.58
5.60
4.93
R1P6
140.35
8.27
5.50
5.24
R1P7
98.83
7.14
4.63
4.57
R1P8
167.51
9.81
5.96
5.32
R1P9
183.90
9.56
5.91
5.77
R1P10
182.85
10.01
6.06
R1P11
122.56
7.59
5.64
R2P1
182.15
9.11
6.05
5.65
R2P1 AL/ Allegheny
116.11
8.33
4.98
4.85
R2P1 ALT/ Allegheny
109.74
8.34
4.69
4.55
R2P2
50.03
5.82
4.00
3.79
R2P2 Altoit/ Potomac
78.9
7.68
4.16
R2P3
92.5
5.03
4.44
R2P4
138.62
9.87
5.14
4.72
R2P5
70.36
7.01
4.28
4.03
R2P6
122.22
8.76
5.17
4.89
R2P7
130.66
8.17
5.47
5.16
R2P8
102.53
7.88
4.96
R2P9
92.09
7.73
4.82
4.50
R2P10
120.05
5.31
R2P11
155.38
9.96
5.46
5.18
SIMINA
157.96
9.84
5.84
5.40 RP
115.34
8.02
4.34

20. Shape of the fruits Genotype Height cm Diameter 1 cm Diameter 2 cm
Index of shape
Fruit shape
R1P1
6.95
4.40
4.19
1.62
elongate
R1P2
8.11
5.12
4.84
1.63
R1P3
9.13
6.60
6.19
1.43
R1P4
7.94
5.71
5.34
1.44
R1P5
8.58
5.60
4.93
R1P6
8.27
5.50
5.24
1.54
R1P7
7.14
4.63
4.57
1.55
R1P8
9.81
5.96
5.32
1.74
R1P9
9.56
5.91
5.77
1.64
R1P10
10.01
6.06
1.69
R1P11
7.59
5.64
1.39
R2P1
9.11
6.05
5.65
1.56
R2P1 AL/ Allegheny
8.33
4.98
4.85
R2P1 ALT/ Allegheny
8.34
4.69
4.55
1.81
R2P2
5.82
4.00
3.79
1.49
R2P2 Altoit/ Potomac
7.68
4.16
1.76
R2P3
5.03
4.44
R2P4
9.87
5.14
4.72
2.00
R2P5
7.01
4.28
4.03
R2P6
8.76
5.17
4.89
R2P7
8.17
5.47
5.16
R2P8
7.88
4.96
R2P9
7.73
4.82
4.50
1.66
R2P10
5.31
R2P11
9.96
5.46
5.18
1.87
SIMINA
9.84
5.84
5.40
1.75 RP
8.02
4.34
1.80

21. R1P9

22. Seeds measurement Genotype Nr of seeds/fruits Weight seeds g/fruit
Weight g/seed
R1P1
5.6
5.2
0.9
R1P2 6
8.6
1.4
R1P3 8
14.2
1.8
R1P4
2.3
3.7
1.6
R1P5
8.5
R1P6
3.5
1.5
R1P7 3
4.3
R1P8
7.3
10.1
R1P9
5.3
8.4
R1P10
4.5
R1P11
5.4
9.2
1.7
R2P1
5.9 9
R2P1 AL/ Allegheny
7.6
9.8
1.3
R2P1 ALT/ Allegheny
8.8
10.3
1.2
R2P2
4.7
4.4
R2P2 Altoit/ Potomac
6.9
R2P3 11
10.9 1
R2P4
7.8
11.5
R2P5
12.6
R2P6
6.5
7.5
R2P7
5.7
8.1
R2P8
4.1
R2P9
4.6
1.1
R2P10
6.8
8.3
R2P11 7
10.6
SIMINA
9.6

23. R1P1
R2P2

24. Shape of the seeds Genotupe Height cm Diameter 1 cm Diameter 2 cm
Index of shape
Shape
R1P1
2.13
1.27
0.75
2.11
elongate
R1P6
1.79
1.29
0.74
1.77
R1P10
2.57
1.51
0.80
2.24
R1P11
2.85
1.36
0.77
2.67
R2P1
2.56
1.48
0.76
2.28
R2P1 AL/ Allegheny
2.39
1.35
0.82
2.21
R2P1 ALT/ Allegheny
1.31
2.22
R2P2
2.06
1.34
1.96
R2P4
1.45
R2P6
2.35
1.16
1.88
R2P8
2.25
1.47
0.73
2.04
R2P9
2.15
1.37
2.05
R2P10
2.60
2.46

25. R1P10
R1P1

26. Fruit analyzes Genotype Brix Brix 2 Total dry substance R1P1 26.27
13.40
29.98%
R1P2
20.93
17.30
25.05%
R1P3
19.77 -
22.92%
R1P4
27.90
30.95%
R1P5
21.93
11.80
22.30%
R1P6
26.10
26.97%
R1P7
22.07
23.71%
R1P8
21.23
18.40
23.76%
R1PP9
25.87
18.60
28.93%
R1P10
23.97
15.70
26.63%
R1P11
23.77
26.23%
R2P1
20.87
24.13%
R2P1 AL/ Allegheny
21.37
26.78%
R2P1 ALT/ Allegheny
20.17
9.47%
R2P2
15.40
17.18%
R2P2 Altoit/ Potomac
24.33
28.69%
R2P3
25.03
27.01%
R2P4
22.27
19.50
24.04%
R2P5
16.03
14.00
20.19%
R2P6
22.03
26.72%
R2P7
26.13
28.80%
R2P8
27.10
24.00
31.05%
R2P9
23.20
26.00
26.32%
R2P10
22.97
26.02%
R2P11
23.87
19.00
26.51%
Simina
20.00
23.10%

28. Average (Ascorbic acid mg/100 g asimina)
Vitamin C
Genotype
C (mg/100 g asimina)
Average (Ascorbic acid mg/100 g asimina)
sample 1
sample 2
R2P1 AL/ Allegheny
17.89
18.44
18.16
R2P1 ALT/ Allegheny
18.79
19.46
19.13

29. Sensory analysis of fruits
Genotype
Fruit size (1-3)
Fruit shape (1-3)
Attractive appearance (1-5)
Pulp firmness (1-5)
Pulp succulent (1-3)
Color of the pulp (1-3)
Taste (1-6)
Flavor (1-4)
Total (1-32)
R1P1
2.00
2.33
1.33
3.00
17.67
R1P2
1.78
1.67
2.11
2.22
16.44
R1P5
1.80
1.40
1.20
1.60
13.00
R1P8
2.82
2.36
2.55
2.09
1.91
2.18
4.18
2.64
20.73
R1P9
1.88
1.63
1.50
1.75
2.13
13.50
R1P10
5.00
3.33
21.00
R2P4
3.38
2.38
17.50
R2P5
2.29
2.43
2.14
4.29
2.71
20.29
R2P6
2.27
3.36
2.45
18.82
R2P8
4.00
20.09
R2P9
1.89
1.56
3.78
2.67
17.78
R2P11
2.50
2.30
2.20
2.10
4.10
2.90
19.70 RP
1.90
3.30
17.90
For sensory analysis I had a sample of 20 people made of students , analysts and teachers with ages between 19 and 56 years.

30. R2P5

31. R2P8

32. Conclusions and recommendations
After the measurements and the analyzes I recommend :
Earliness and lateness: R1P2, R1P8
Production/tree: R1P6, R2P1
Fruits measurement: R1P3, R2P1, R2P4
Fruits analysis:R1P4, R2P9, Allegheny
Seeds measurement: R1P4, R2P2
Sensory analysis: R1P10, R1P8
International Student Symposium "Hortus Academicus“ April 27, Bucharest, Romania

33. Thank you for your attention!
International Student Symposium "Hortus Academicus“ March 29, Bucharest, Romania