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SL34

LINEAGE Typica-like genetic background. GENETIC DESCRIPTION Bourbon-Typica Group (Typica-related) HISTORY SL34 was originally selected in Kenya the late 1930s at the Scott Agricultural Laboratories (for more on Scott Labs, see SL28). Individual tree selections made at the Scott Laboratories in Kenya during the 1935-1939 period were prefixed “SL.” SL34 was selected from a single tree on the Loresho Estate in Kabete, Kenya since research at the Scott Laboratories was often conducted in cooperation with local, private estate owners. The tree was labeled “French Mission.” French missionaries known as Spiritans established a mission in 1893 at Bura (Taita Hills, Kenya), in which…

Arabica Varieties

SL28

LINEAGE Selection of “Tanganika Drought Resistant.” Bourbon-like genetic background. GENETIC DESCRIPTION Bourbon-Typica Group (Bourbon-related) HISTORY SL28 is among the most well-known and well-regarded varieties of Africa. It has consequently spread from Kenya, where it was originally selected in the 1930s, to other parts of Africa (it is important in Arabica-growing regions of Uganda, in particular) and now to Latin America. The variety is suited for medium to high altitudes and shows resistance to drought, but is susceptible to the major diseases of coffee. SL28 is notable for its rusticity—a quality meaning that it can be left untended for years or…

Arabica Varieties

Batian

LINEAGE Composite variety containing parentage from: SL28, SL34, Rume Sudan, N39, K7, SL4 and the Timor Hybrid. GENETIC DESCRIPTION Introgressed (Other) HISTORY A variety resistant to coffee leaf rust and coffee berry disease created at the Coffee Research Station (CRS; now the Coffee Research Institute, CRI) in Ruiru, Kenya. Batian was released in Kenya in 2010. Batian was created via single-tree selections from fifth filial (F5) generations from the male parent of some Ruiru 11 progenies. Batian is a composite variety, mixing three different pure line varieties. The varieties involved in the original crosses are: SL28, SL34, Rume Sudan, N39, K7, SL4 and the Timor…