Beans are divided by seed, RUIRU 11
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Ruiru (RUIRU) 11
High-yielding dwarf hybrid varieties resistant to leaf rust and berry disease. Released in Kenya.
Ruiru 11 is a compact and high-yielding variety cultivated in Kenya that allows for higher density and reduces losses caused by diseases and insect pests. In 1968, coffee pulp disease broke out in Kenya, resulting in a 50% reduction in production. The crisis triggered action. In the 1970s, Ruilu Coffee Research Station began an intensive breeding program for CBD-immunized varieties and named it Ruilu 11. Ruilu 11 was released in 1985.
Breeders are committed to cultivating compact varieties that are suitable for intensive cultivation and with high flavor and quality characteristics that are mainly tall for African households. Breeders spend many years carrying out multiple crosses (which inherit the best properties of the selected parent). This work nurtured the father of Ruiru.
Ruiru 11 male parent is resistant to berry disease [from Rumei Sultan (RumeSudan), Timor (TimorHybrid Lines) and K7 and high quality flavor quality (L from N39, SL28, SL34 and Bourbon). The female parent selection of Ruiru 11 provides compact plant shape and additional protection against leaf rust and berry disease. Some Katim populations (including Katim 129) meet the requirements. Finally, the tall male parent was crossed with the female parent Katim to develop a compact Ruilu 11 population resistant to leaf rust and berry disease.
In order to propagate Rui Lu 11 on a large scale, breeders used pollen from male parents to artificially pollinate the female parent to produce the first generation (F1) hybrid seeds. This increases its heterosis, so the yield is high. Ruiru 11 brothers and sisters were mixed and distributed to farmers. This variety is called a compound variety. Because of artificial pollination, seed production can not keep up with the needs of farmers.
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