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Two improved tropical maize composites, TZL COMP3 and TZL COMP4; representing complementary heterotic pools have been subjected to four cycles of reciprocal recurrent selection (RRS) for two decades to enhance varietal cross performance. The objectives of this study were to evaluate the effect of...


Kolawole, A.O.Menkir, A.Blay, E.Ofori, K.Kling, J.G.[Changes in heterosis of maize (Zea mays L.) varietal cross hybrids after four cycles of reciprocal recurrent selection]Changes in heterosis of maize (Zea mays L.) varietal cross hybrids after four cycles of reciprocal recurrent selection

The GGE biplot tool has potential for determining combining ability effects, identifying distinct heterotic groups and efficient testers in a line × tester study. However, its use for such analysis has not been adequately explored. The objectives of this study were to (i) assess combining ability...


Badu-Apraku, B.Akinwale, R.O.[Biplot analysis of line X tester data of maize (Zea mays L.) inbred lines under stress and nonstress environments]Biplot analysis of line X tester data of maize (Zea mays L.) inbred lines under stress and nonstress environments

De grandes differences existent entre les cultivars quant a la frequence et la nature des variations phenotypiques sur les plantes regenerees apres culture in vitro. Une grande part de ces variations mime la variabilite naturelle et les variants apparaissent essentiellement comme des copies d'aut...


Vuylsteke, D.R.Swennen, R.Langhe, E. de[Somaclonal variation in plantains (Musa spp, AAB group) derived from shoottip culture]Somaclonal variation in plantains (Musa spp, AAB group) derived from shoottip culture

The response of two soybean varieties (Samsoy-2 and improved variety TGx 1448-2E) to Bradyrhizobium inoculation in the northern Guinea savanna of Nigeria was tested in a researcher-managed on-farm trial. There were variations in soybean yields between and within farmers fields. Data obtained from...


Okogun, J.Otuyemi, B.Sanginga, P.[Soybean yield determinants and response to rhizobial inoculation in an onfarm trial in the northern Guinea savanna of Nigeria]Soybean yield determinants and response to rhizobial inoculation in an onfarm trial in the northern Guinea savanna of Nigeria

Pepper (Capsicum spp. L.) production is constrained by Cucumber mosaic virus (CMV) and Potato virus Y (PVY). Local pepper varieties may confer some degree of resistance against these viruses which needs to be evaluated. A screen house study using potted plants was carried out to determine perform...


Arogundade, O.Balogun, O.S.Goodness, A.U.Kumar, P.L.[Impact of single and double infection with cucumber mosaic virus and potato virus Y on growth and yield of pepper]Impact of single and double infection with cucumber mosaic virus and potato virus Y on growth and yield of pepper

Cowpea covers the largest area of any grain legume in Africa and is especially important in West Africa where Nigeria and Niger alone account for over 75% of the total cowpea production in the world. Despite successes of international and national cowpea improvement research in the development an...


Manda, J.Alene, A.Hirpa Tufa, A.Abdoulaye, TahirouKamara, A.Olufajo, O.Boukar, O.Manyong, Victor M.[Adoption and ex-post impacts of improved cowpea varieties on productivity and net returns in Nigeria]Adoption and ex-post impacts of improved cowpea varieties on productivity and net returns in Nigeria

The complimentary effects of a native rhizobia strain (SAMFIX 286), lime and single superphosphate (SSP) as components of ISFM were evaluated on the biomass, nodulation and N2 fixation of cowpea (Vigna unguiculata L.). Lime was applied at the rate of 250 kg (Ca(OH)2) ha−1, while SSP was applied a...


Bello, S.K.Yusuf, A.A.Masso, C.[Performance of cowpea as influenced by native strain of rhizobia, lime and phosphorus in Samaru, Nigeria]Performance of cowpea as influenced by native strain of rhizobia, lime and phosphorus in Samaru, Nigeria

Goergen, Georg E.[Southern armyworm, a new alien invasive pest identified in west and central Africa]Southern armyworm, a new alien invasive pest identified in west and central Africa

eports of cassava root rot disease from different African countries have increased in recent times. Field studies were conducted from July 1998 to October 1999 to determine a reproducible disease assessment method that would allow the comparison of results from different locations and an evaluati...


Onyeka, T.J.Dixon, Alfred G.O.Ekpo, E.J.A.[Field evaluation of root rot disease and relationship between disease severity and yield in cassava]Field evaluation of root rot disease and relationship between disease severity and yield in cassava

This study evaluated the effect of autoclaving process on the production of resistant starch (RS) from cassava starch. RS was prepared by debranching, autoclaving and storage of cassava starch from two Nigeria varieties (TMS 30572 and TMS 98/0581). Starch suspensions were prepared with different ...


Abioye, V.F.Adeyemi, I.A.Akinwande, B.A.Kulakow, P.Maziya-Dixon, B.B.[Effect of autoclaving on the formation of resistant starch from two Nigeria Cassava (Manihot esculenta) varieties]Effect of autoclaving on the formation of resistant starch from two Nigeria Cassava (Manihot esculenta) varieties

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