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.
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.
Recorded in mature trees (only if replicated) from the ground level to the top of the tree.
Observe 10 ripe fruits randomly selected and record the predominant colour.
Code | Term | Description |
---|---|---|
1 | Grey | |
2 | Green | |
3 | Yellow | |
4 | Red | |
5 | Brown | |
6 | Blue | |
7 | Violet | |
99 | Other (specify in the Notes descriptor) |
Record the predominant shape using 10 fruits randomly selected.
Code | Term | Description |
---|---|---|
1 | Oblong | |
2 | Ellipsoid | |
3 | Globose | |
4 | Pyriform | |
5 | Reniform | |
6 | Ovate | |
7 | Obovate |
Measured from the base to the tip of the fruit. Record the average length of 10 fruits randomly selected.
Record the average diameter of 10 fruits randomly selected at the widest point.
Record the average weight of 10 fruits.
Observe 10 ripe fruits randomly selected and record the predominant colour.
Code | Term | Description |
---|---|---|
1 | White | |
2 | Green | |
3 | VIolet | |
4 | Pink | |
99 | Other (specify in the Notes descriptor) |
Recorded on ripe fruits.
Code | Term | Description |
---|---|---|
1 | Soft | |
2 | Intermediate | |
3 | Firm |
Recorded on ripe fruits.
Code | Term | Description |
---|---|---|
0 | Tasteless | |
1 | Bitter | |
2 | Sour | |
3 | Astringent | |
4 | Sweet | |
99 | Other (specify in the Notes descriptor) |
Record the average weight of 10 fruits randomly selected.
Measure at the middle of the fruit.
Code | Term | Description |
---|---|---|
1 | Dark brown | |
2 | Reddish black | |
99 | Other (specify in the Notes descriptor) |
Record the average weight of 10 seeds.
Code | Term | Description |
---|---|---|
0 | No | |
1 | Yes |
Code | Term | Description |
---|---|---|
1 | Early | |
2 | Medium | |
3 | Late |
Fruit nutritional content
Fruit nutritional content
Fruit nutritional content
Fruit nutritional content
Fruit nutritional content
Fruit nutritional content
Fruit nutritional content
Fruit nutritional content
Biotic stress susceptibility
Biotic stress susceptibility
Biotic stress susceptibility
Biotic stress susceptibility