Kenya Agricultural Research Institute 1st Adaptive Research Conference Programe and Abstracts

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Kenya Agricultural Research Institute
Macadamia has been grown commercially in Kenya for about 40 years, however, selection and introduction of superior trees was embarked on during the last 25 years. From 300 mother trees that were previously selected only 17 superior clones are currently under investigation in four agro-ecological zones. Currently 4 of 17 clones have been recommended for commercial production in the central, eastern, and western highlands. Local adaptability tests show that there are no significant differences in age to bearing, yield and kernel quality of the majority of the macadamia (M. intergrifolia) clones in Kenya. Amongst the M. integrifolia clones evaluated, EMB-l, MRG-20, and KRG-15 had acceptable yields (55 to 80 kg) and kernel recovery (31.3 to 33.7%) in three agro-ecological zones (main coffee, marginal coffee, and coffee/tea zones. However, MRG-20 was considered the clone with a wide adaptability. KRG-15 has excellent yields (80 kg, 92 % grade 1 nuts, 32.4% kernel recovery) and is recommended for growth in the main coffee zone, marginal coffee zone and sunflower maize zone. KMB-3 (macadamia hybrid) performs particularly well in the coffee/tea zone (yield – 60 kg; 90 % grade 1, 35.3% kernel recovery). Seven new clones from Meru, (MRV-24 and MRV-25), Wondanyi (TTW-2), Embu (EMB-H and EMB-2) and Kiambu (KMB-4 and KMB-25) are been evaluated for adaptation in the main coffee or coffee/tea zone.