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Transgenic plant studies have lead to the breakthrough discovery of RNA silencing as a conserved mechanism for gene regulation across kingdoms. Recent molecular genetic studies have revealed a major role for RNA silencing in the formation of silent chromatin, characterized by histone modification...


Ingelbrecht, I.Mirkov, T.E.Dixon, Alfred G.O.Menkir, A.[Epigenetic lessons from transgenic plants In: Floricultural, ornamental and plant biotechnology: advances and topical issues]Epigenetic lessons from transgenic plants In: Floricultural, ornamental and plant biotechnology: advances and topical issues

This study was conducted to investigate a cheap and readily available alternative control measure for cassava anthracnose disease causal agent (Colletotrichum gloeosporioides f. sp. manihotis), through the use of antimicrobial crude plant extracts such as neem (Azadirachta indica), bitter leaf (V...


Fokunang, C.N.Akem, C.N.Ikotun, T.Dixon, Alfred G.O.[Efficacy of antimicrobial plant crude extracts on the growth in Colletotrichum gloeosporiodes f. sp. manihotis]Efficacy of antimicrobial plant crude extracts on the growth in Colletotrichum gloeosporiodes f. sp. manihotis

Wild relatives of cassava (Manihot spp.) and yam (Dioscorea spp.) have many attributes of importance to the genetic improvement of the cultivated species. Some crosses between cassava and its wild relatives have led to poly ploids (crosses to M. />laziovii and M. epruinosa) and resistance to two ...


Asiedu, RobertBai, K.V.Terauchi, R.Dixon, Alfred G.O.Hahn, S.K.[Status of wide crosses in cassava and yam]Status of wide crosses in cassava and yam

Experiments were conducted at Ibadan, Nigeria to assess the effect of leaf trichome characteristics (pubescence intensity index, length, and orientation) on field resistance of cassava to the green spider mite, Mononychellus tanajoa (Bondar). There were significant (P < 0.01) differences in M. ta...


Nukenine, E.N.Dixon, Alfred G.O.Hassan, A.T.Zalom, F.G.[Relationships between leaf trichome characteristics and field resistance to cassava green mite (Mononychellus tanajoa (Bondar)]Relationships between leaf trichome characteristics and field resistance to cassava green mite (Mononychellus tanajoa (Bondar)

The population dynamics of Mononychellus tanajoa as influenced by varietal resistance of cassava was determined over two cassava planting seasons (dry and wet season), using biweekly samples from 11 cassava genotypes in Ibadan, Nigeria. The population size of M. tanajoa and the damage scores were...


Nukenine, E.N.Hassan, A.T.Dixon, Alfred G.O.Fokunang, C.N.[Population dynamics of cassava green mite, Mononychellus tanajoa (Bondar) (Acari: Tetranychidae) as influenced by varietal resistance]Population dynamics of cassava green mite, Mononychellus tanajoa (Bondar) (Acari: Tetranychidae) as influenced by varietal resistance

Fifty-three cassava lines were selected from breeding populations at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria and screened in vitro for resistance to cassava anthracnose disease (CAD). The in vitro inoculation of stem cuttings with the fungus Colletotrichum gloe...


Fokunang, C.N.Dixon, Alfred G.O.Ikotun, T.Asiedu, RobertTembe-Fokunang, E.A.Akem, C.N.[In vitro, greenhouse, and field assessment of cassava lines for resistance to anthracnose disease caused by colletotrichum gloeosporiodes f. sp. Manihotis]In vitro, greenhouse, and field assessment of cassava lines for resistance to anthracnose disease caused by colletotrichum gloeosporiodes f. sp. Manihotis

Cassava (Manihot spp.) improvement strategies at the International Institute of Tropical Agriculture (IITA) are discussed here in relation to the main constraints, target ecologies and utilization of exotic germplasm. Germplasm generated from IITA populations and from other African or non-African...


Dixon, Alfred G.O.Asiedu, RobertHahn, S.K.[Cassava germplasm enhancement at the International Institute of Tropical Agriculture (IITA)]Cassava germplasm enhancement at the International Institute of Tropical Agriculture (IITA)

Cassava production and utilization in Cameroon have undergone a long evolution. The post-independenceand pre-1990 eras were marked by activities that considered cassava to be a subsistence food crop. Duringthis period, farmers relied on coffee and cocoa as the major cash crops. Cassava growers us...


Ngeve, J.M.Tenku, S.N.Dixon, Alfred G.O.Whyte, J.B.A.Okechukwu, R.U.Hanna, R.Akoroda, M.O.[Boilable cassava varieties: what is their role within the context of the global agricultural economy?]Boilable cassava varieties: what is their role within the context of the global agricultural economy?

Amegbeto, K.Asiedu, RobertBandyopadhyay, RanajitCarsky, R.Cherry, A.Chikoye, D.Cornet, D.Coyne, D.L.Dixon, Alfred G.O.Dury, S.Gockowski, J.Halos-Kim, L.Hanna, R.Hauser, S.Hughes, Jacqueline d'ArrosKolesnikova-Allen, M.Kormawa, P.M.Legg, C.Legg, J.P.Lemchi, J.Maroya, N.G.Maziya-Dixon, B.B.Moonan, F.Neuenschwander, P.Nkamleu, G.B.Nolte, C.Norgrove, L.Offer, S.Ogbe, F.Rueda, J.Shiwachi, H.Tenkouano, A.Tindo, M.Toko, M.Weise, S.F.Whyte, J.[Project E: enhancing livelihoods in the humid and subhumid zones of west and central Africa through profitable and sustainable intensification of diverse agricultural systems]Project E: enhancing livelihoods in the humid and subhumid zones of west and central Africa through profitable and sustainable intensification of diverse agricultural systems

Eight improved cassava ( Manihot esculenta check for this species in other resources Crantz) genotypes and one local variety were grown over three years in three agro-ecological zones of Nigeria, to study their response to natural infestations of African cassava mosaic disease (ACMD), cassava ba...


Dixon, Alfred G.O.Ngeve, JMNukenine, EN[Response of cassava genotypes to four biotic constraints in three agro-ecologies of Nigeria]Response of cassava genotypes to four biotic constraints in three agro-ecologies of Nigeria

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