Key descriptors for Dacryodes edulis (Safou)

1.0

This Descriptor list consists of an initial minimum set of characterization and evaluation descriptors for Dacryodes edulis (G. Don) H.J. Lam. This strategic set aims at facilitating access to and utilization of this African indigenous fruit tree. It does not exclude the addition of other descriptors at a later date. Dacryodes edulis (G. Don) H.J. Lam, also known as Safou, African pear, African plum, African palm, bush pear, bush butter tree, butterfruit and native pear, is an important multi-purpose tropical evergreen tree. It belongs to the Burseraceae family. The geographical distribution extends from Angola, through Cameroon, Central African Republic, Congo, Democratic Republic of Congo, Equatorial Guinea, Gabon, Nigeria, to Sierra Leone in the West, Uganda to the East, and to northern Zimbabwe. It is also cultivated in Malaysia. This indigenous agroforestry fruit tree grows in the humid tropical forest. It is well adapted to variations in environmental factors such as soil type, humidity and temperature. Safou produces edible fruits that are highly valued by local people. The fruits are rich in lipids, proteins, vitamins, fibres and minerals playing a significant role in nutrition, especially benefiting poor households. In addition to food security and health benefits, the tree is also used for medicinal purposes and as timber. Fruits are traded both locally and across regional borders. This descriptor list, which follows the international standardized documentation system for the characterization and study of genetic resources as promoted by Bioversity International (Alercia A., 2011), is expected to support studies focusing on genetic and morphological diversity of Dacryodes edulis, conservation of its genetic resources, domestication and to increase production and use of its products.

Crop
Fruit trees
Publisher
ICRAF and FAO, 2021
Bibliographic citation

Muchugi A., Chege J., Tsobeng A., Kang’ethe S., Jamnadass R., Cognetti de Martiis S., Cerutti A.L., Alercia A. 2021. Key descriptors for Dacryodes edulis (Safou). World Agroforestry, Nairobi, Kenya and the Food and Agriculture Organization of the United Nations, Rome, Italy.

Version
1.0

Recorded in mature trees (only if replicated) from the ground level to the top of the tree.

Classification
Characterization
Data type
Numeric
Unit of measure
m

Observe 10 ripe fruits randomly selected and record the predominant colour.

Classification
Characterization
Data type
Coded
CodeTermDescription
1Grey
2Green
3Yellow
4Red
5Brown
6Blue
7Violet
99Other (specify in the Notes descriptor)

Record the predominant shape using 10 fruits randomly selected.

Classification
Characterization
Data type
Coded
CodeTermDescription
1Oblong
2Ellipsoid
3Globose
4Pyriform
5Reniform
6Ovate
7Obovate

Measured from the base to the tip of the fruit. Record the average length of 10 fruits randomly selected.

Classification
Characterization
Data type
Numeric
Unit of measure
cm

Record the average diameter of 10 fruits randomly selected at the widest point.

Classification
Characterization
Data type
Numeric
Unit of measure
cm

Record the average weight of 10 fruits.

Classification
Characterization
Data type
Numeric
Unit of measure
g

Observe 10 ripe fruits randomly selected and record the predominant colour.

Classification
Characterization
Data type
Coded
CodeTermDescription
1White
2Green
3VIolet
4Pink
99Other (specify in the Notes descriptor)

Recorded on ripe fruits.

Classification
Characterization
Data type
Coded
CodeTermDescription
1Soft
2Intermediate
3Firm

Recorded on ripe fruits.

Classification
Characterization
Data type
Coded
CodeTermDescription
0Tasteless
1Bitter
2Sour
3Astringent
4Sweet
99Other (specify in the Notes descriptor)

Record the average weight of 10 fruits randomly selected.

Classification
Characterization
Data type
Numeric
Unit of measure
g

Measure at the middle of the fruit.

Classification
Characterization
Data type
Numeric
Unit of measure
cm
Classification
Characterization
Data type
Coded
CodeTermDescription
1Dark brown
2Reddish black
99Other (specify in the Notes descriptor)

Record the average weight of 10 seeds.

Classification
Characterization
Data type
Numeric
Unit of measure
g
Classification
Evaluation
Data type
Coded
CodeTermDescription
0No
1Yes
Classification
Characterization
Data type
Numeric
Classification
Evaluation
Data type
Coded
CodeTermDescription
1Early
2Medium
3Late

Fruit nutritional content

Classification
Evaluation
Data type
Numeric
Unit of measure
mg/100g-1 DW

Fruit nutritional content

Classification
Evaluation
Data type
Numeric
Unit of measure
% DW

Fruit nutritional content

Classification
Evaluation
Data type
Numeric
Unit of measure
mg/100g-1 DW

Fruit nutritional content

Classification
Evaluation
Data type
Numeric
Unit of measure
mg/100g-1 DW

Fruit nutritional content

Classification
Evaluation
Data type
Numeric
Unit of measure
%

Fruit nutritional content

Classification
Evaluation
Data type
Numeric
Unit of measure
% DW

Fruit nutritional content

Classification
Evaluation
Data type
Numeric
Unit of measure
% DW

Fruit nutritional content

Classification
Evaluation
Data type
Numeric
Unit of measure
mg/100g-1 DW

Biotic stress susceptibility

Classification
descriptors.common.category.bioticstress
Data type
Free text

Biotic stress susceptibility

Classification
descriptors.common.category.bioticstress
Data type
Free text

Biotic stress susceptibility

Classification
descriptors.common.category.bioticstress
Data type
Free text

Biotic stress susceptibility

Classification
descriptors.common.category.bioticstress
Data type
Free text