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Cassava root rot disease is an increasing problem in Africa where yield losses of about 80% have been recorded. We evaluated 290 African landraces and 306 improved genotypes from the germplasm collections of the International Institute of Tropical Agriculture (IITA), for sources of resistance usi...


Onyeka, T.Dixon, A.Ekpo, E.[Identification of levels of resistance to cassava root rot disease (Botryodiplodia theobromae) in African landraces and improved germplasm using In vitro inoculation method]Identification of levels of resistance to cassava root rot disease (Botryodiplodia theobromae) in African landraces and improved germplasm using In vitro inoculation method

Ten Cassava (Manihot esculenta, Crantz) genotypes were assessed for phenotypic fresh tuber yield stability for 2 years in nine locations in three West African countries (Nigeria, Ghana and Benin). From a combined analysis of variance for fresh yield, all main effects were significant. First order...


Asante, K.Dixon, Alfred G.O.[Analysis of phenotypic stability in ten cassava genotypes in three West African countries]Analysis of phenotypic stability in ten cassava genotypes in three West African countries

Three traits, namely root number (RTNO), root weight(RTWT) and fresh yield (FYLD) of some cassava genotypes wrer scored and analysed for heritability. The genotypes differed significantly for each of the tree traits. Generally heritability per replicate was above 50% indicating that the additive ...


Asante, K.Dixon, Alfred G.O.[Heritability studies of some cassava genotypes]Heritability studies of some cassava genotypes
Autor: Myers, G.O.

En matiere d'ameliotation genetique du nie-be, il est rare de trouver un plant ou une variete posse-dant taus les caracteres desires. La tecombinaison des catacteres desires, II partir de sources parentales dis-tinctes, s'obtient en croisant les plants et en effectuant les pollinisations croisees...


Myers, G.O.[Croisement manuel du niebe: Guide de recherche de lIita, No. 42]Croisement manuel du niebe: Guide de recherche de lIita, No. 42

Common beans are a warm-season, food legume cultivated in areas prone to water limitation throughout their growing season. This study assessed the magnitude and pattern of trait associations for a total of 202 common bean genotypes divided into panels of 81 Andean and 121 Mesoamerican gene pool a...


Asfaw, A.Ambachew, D.Shah, TushaarBlair, Matthew W.[Trait associations in diversity panels of the two common bean (Phaseolus vulgaris L.) gene pools grown under well-watered and water-stress conditions]Trait associations in diversity panels of the two common bean (Phaseolus vulgaris L.) gene pools grown under well-watered and water-stress conditions
International Center for Tropical Agriculture[Grass and legumes genotypes with superior adaptation to edaphic and climatic constrains are developed: Output 3]Grass and legumes genotypes with superior adaptation to edaphic and climatic constrains are developed: Output 3

Discusses the genetic aspects of criteria of trypanotolerance including parasitaemia, anaemia control and immune response. Includes data on heritability estimates for daily liveweight change, for PCV under low & high trypanosome prevalence, and for number of treatments required in four periods af...


Trail, J.C.M.D'Ieteren, G.D.M.Feron, A.Itty, P.Kakiese, O.Maehl, J.H.H.Mulungo, M.Nagda, S.M.Paling, R.W.Pelo, M.Rarieya, J.M.Thorpe, W.R.[Genetic aspects of criteria of trypanotolerance]Genetic aspects of criteria of trypanotolerance

Ndengo, N.E.Ki-Munseki, A.L.Hanna, R.Ngbolua, K.[Screening cassava (Manihot esculenta CRANTZ) genotypes for resistance to African root and tuber scale (Stictococcus vayssierei Richard) in differents Agro-ecological zones of Beni (North Kivu, DR Congo)][Criblage de génotypes de manioc (Manihot esculenta CRANTZ) pour la résistance à la cochenille Africaine de racines et tubercules (Stictococcus vayssierei Richard) dans différentes zones agro-écologiques de Beni (Nord Kivu, RD Congo)]Criblage de génotypes de manioc (Manihot esculenta CRANTZ) pour la résistance à la cochenille Africaine de racines et tubercules (Stictococcus vayssierei Richard) dans différentes zones agro-écologiques de Beni (Nord Kivu, RD Congo)

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