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Oryza Glaberrima): History and Future Potential

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Oryza Glaberrima): History and Future Potential African rice (Oryza glaberrima): History and future potential Olga F. Linares* Smithsonian Tropical Research Institute, Box 2072, Balboa-Ancon, Republic of Panama Contributed by Olga F. Linares, October 4, 2002 The African species of rice (Oryza glaberrima) was cultivated long existed, the fact remains that African rice was first cultivated before Europeans arrived in the continent. At present, O. glaber- many centuries before the first Europeans arrived on the West rima is being replaced by the introduced Asian species of rice, African coast. Oryza sativa. Some West African farmers, including the Jola of The early Colonial history of O. glaberrima begins when the southern Senegal, still grow African rice for use in ritual contexts. first Portuguese reached the West African coast and witnessed The two species of rice have recently been crossed, producing a the cultivation of rice in the floodplains and marshes of the promising hybrid. Upper Guinea Coast. In their accounts, spanning the second half of the 15th century and all of the 16th century, they mentioned here are only two species of cultivated rice in the world: the vast fields planted in rice by the local inhabitants and TOryza glaberrima, or African rice, and Oryza sativa, or Asian emphasized the important role this cereal played in the native rice. Native to sub-Saharan Africa, O. glaberrima is thought to diet. The first Portuguese chronicler to mention rice growing in have been domesticated from the wild ancestor Oryza barthii the Upper Guinea Coast was Gomes Eanes de Azurara in 1446. (formerly known as Oryza brevilugata) by peoples living in the He described a voyage along the coast 60 leagues south of Cape floodplains at the bend of the Niger River some 2,000–3,000 Vert, where a handful of men, navigating down a river that was years ago (1, 2). The two strains of O. sativa (Oryza japonica and probably the Gambia, went ashore: ‘‘they said they found the Oryza indica) were domesticated independently, both probably country covered by vast crops, with many cotton trees and large in China (3, 4). It is also possible that Asian rice was domesti- fields planted in rice . the country looked to them as having cated in tropical Asia south of China, but evidence for this the aspect of a pond (i.e., a marais)’’ (7). A few years later, in possibility is still lacking. 1455, Alvise da Cadamosto confirmed the previous observations At the present time, O. glaberrima is being replaced every- by mentioning the many varieties of rice that were grown in the where in West Africa by the Asian species, introduced into the Gambian area (8). That rice growth was not confined to the continent by the Portuguese as early as the middle of the 16th valley of the Gambia River, but was practiced by many popula- century (1). The native species is thus rapidly diminishing in tions living along the West African coast known as the Southern importance. As a National Research Council report points out, Rivers, was brought out by Eustache de la Fosse in 1479–1480. ‘‘this should not be allowed to happen. The rice of Africa (O. Talking about a visit he made to theˆ Ile de Los, off the coast of glaberrima) has a long and noteworthy history’’ (5). This article Conakry, the capital of present-day Guinea, he mentions that at begins with information about the past and present status of the entrance of the market ‘‘there were several large mounds of African rice and then moves to a detailed example of when, how, rice, and with human labor it was carried back to the ships’’ (9). and why it was cultivated by the Jola, a population of ancient rice Scattered references to rice are also found in the chronicle of growing peoples living in the swampy coastal areas of Casa- Duarte Pacheco Pereira dating from 1506–1508. Besides men- mance, in southern Senegal. It compares the status of O. tioning that the Falupos, a general term used at the time for the glaberrima in 1960 with what it is today, when only remnant Jola living in the area between the Casamance and Guinea populations remain. My purpose is to explore the reasons for the Bissau, had lots of rice, he alluded to the Cocalis (the present-day demise of the species and document the contexts in which it still Landuma) and the Biafadas, both of whom still grow rice in the survives. The final section argues that farmers need to preserve coastal areas of Guine Bissau and Guinea Conakry (10). Also, African rice and improve its cultivation. In a continent where the well-known compiler, Valentim Fernandes, whose second- food deficits are the rule, this hardy species has qualities that hand account dates from about the same time (1506–1510), make it superior to Asian rice as a subsistence crop. Recent remarks that ‘‘this land is rich in food, to wit rice, millet and agronomic advances now allow for gene transfer between the two beans, cows and goats, chickens and capons and numerous wines species, thus creating hybrids that are better adapted, and higher and other food products’’ (11). yielding under adverse conditions, than either parent species. The first Portuguese observers greatly admired the native rice-growing technology, because it involved diking, transplant- Ancient History of the O. glaberrima Species ing, and other ‘‘intensive’’ practices. Already in the 1590s, Andre´ In the absence of firm archaeological evidence it is difficult to Alvares d’Almada, who was born in Cabo Verde of mixed assess whether Porte`res (1, 2) is correct in suggesting that O. European and African heritage (thus a Luso-African) and was glaberrima was first domesticated in the Inland Delta of the well seasoned by travels up and down the Guinea Coast that Upper Niger River, in what is today Mali, Ϸ2,000 or 3,000 years helped him to become a good naturalist, provides us with an ago. According to Porte`res, the species spread to two secondary account of rice cultivation as practiced by peoples living along centers of diversification, one in the coast of Gambia, Casa- the Gambia, Casamance, and Geba rivers. He wrote that ‘‘in mance, and Guinea Bissau, the other in the Guinea forest these parts the rainy season starts at the end of April, beginning between Sierra Leone and the western Ivory Coast. of May. The Blacks make their rice fields in these plains; they Harlan et al. (6) have suggested an alternative theory. They construct dikes of earth for fear of the tides, but despite them have proposed that O. glaberrima was selected for at several [the dikes] the river breaks them frequently, flooding the rice different localities within the vast forest and savanna areas, fields. Once the rice has sprouted, they pull it out and transplant where the wild ancestor species O. barthii grew and was har- vested by ancient hunting–gathering human populations. Whether one or several centers of African rice domestication *E-mail: [email protected]. 16360–16365 ͉ PNAS ͉ December 10, 2002 ͉ vol. 99 ͉ no. 25 www.pnas.org͞cgi͞doi͞10.1073͞pnas.252604599 Downloaded by guest on October 1, 2021 it on land that is less inundated, where the rice yields’’ (12). Although d’Almada seems confused about the practice of trans- planting, which is done in deep water rather than well-drained land, he provides ample evidence that the natives of those areas were growing swamp or wet rice in diked fields using intensive techniques. Nearly a century was to pass before we have another detailed account of local rice-growing practices. In 1685 or thereabouts, Sieur de la Courbe crossed the hinterland between the Gambia and Guinea Bissau, a territory that he mentions was occupied by the Felupos (the Jola) and the Banyun (the ancient Bainouk). At one point he went out for a walk along what may have been a tributary of the Soungrougrou marigot (or tidal creek) dividing Lower from Middle Casamance (13). He writes, ‘‘I saw fields of rice located along the river; they are traversed by small walkways from space to space that prevents the water from running out; after it rains, one seeds the rice, which grows in the water’’ (14). In another part of de la Courbe’s account, the section that Labat plagiarized in 1728 and ascribed to a governor called Andre´ Brue, he gives a description of the countryside: ‘‘the low lands, and those that are watered by ordinary spillover from the heavy rains at the height of the season, or inundated by springs or currents coming from higher up, are all planted in rice. They [meaning the people] cut up their land by means of small dikes that retain water so that the rice is always bathed; because it likes to be in the water; and it grows as the water rises’’ (15). Further on he describes the technology used by the Felupos or Jola: ‘‘The lands that are flat and well irrigated are perfectly cultivated, and they do not use but shovels of wood provided with a flat piece of iron at one end and a long handle to cultivate’’ (ref. 15, pp. 43–44). This is one of the most detailed early references (circa 1685) to the kajandu, the long-handled fulcrum shovel used by the Jola and their close relatives in Guinea Bissau to turn over Fig.1. Map of Lower Casamance, Senegal. the earth and prepare their fields. To summarize, the Jola and their neighbors were certainly growing wet rice and using intensive techniques, such as diking both species, a feat that that has recently met with considerable to retain rainwater and transplanting, at the time they first success.
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