International Journal of Agricultural Research1816-48972152-2553Academic Journals Inc.10.3923/ijar.2012.33.45Vigna unguiculata L. Walp) Landraces Grown under Humid Lowland Condition]]>UdensiO.IkpemeE.V.EduE.A.EkpeD.E.1201271Establishing the extent of relationship, identifying the cause and measuring the relative importance of such associations to yield is very crucial for varietal selection, breeding and subsequent improvement of crops, especially cowpea landraces. This research x-rays correlation coefficients and path coefficients of yield and yield-influencing traits in cowpea landraces. Seeds of four varieties of locally grown cowpea were sown in a Randomized Complete Block Design (RCBD) in ten replications. The field study was carried out at the University of Calabar Experimental Farm, University of Calabar, Nigeria, during the 2010-2011 growing season. Correlation coefficients and path coefficients were computed on yield and yield-contributing traits. Results obtained revealed that significant relationships between yield and yield-contributing traits existed which could be indices for selection. Genotypic correlations coefficients were high and more significant than the phenotypic and environmental correlation coefficients. Path coefficient analysis shows that number of pod per plant had the highest direct effects to cowpea yield (0.588). This was followed by number of flowers (0.454), number of seeds per pod (0.366), leaf area at 5 weeks (0.366) and pod length and 100 seed weight (0.316), respectively. Other morphological traits had negative direct effects on seed yield such as vein length at 10 weeks (-0.627), number of leaves at 5 weeks (-0.215), number of leaves at 10 weeks (-0.033), leaf area at 10 weeks -1.124, days to 50% flowering (-0.083) and days to 50% maturity (-0.066). Succinctly, it therefore implies that number of pods per plant, number of leaves per plant, leaf area, number of flowers per plant, pod length and number of seeds per pod are good selection indices for a high yielding variety of cowpea, especially the landraces. This then can be exploited in hybridization programmes involving cowpea.]]>Afiah, S.A.N. and E.M. Ghoneim,2000Akinyele, B.O. and O.S. Osekita,2006Abelmoschus esculentus (L.) Moench).]]>Arshad, M., A. Bakhsh, M. Zubair and A. Ghafoor,2003Cicer arietinum L.).]]>Arshad, M., A. Bakhsh and A. Ghafoor,2004Cicer arietinum L.) under rainfed conditions.]]>Ashraf, M., A. Ghafoor, N.A. Khan and M. Yousaf,2002Azeem, I.K. and S.F.M. Azhar,2006Gossypium hirsutum (L.).]]>Center for New Crops and Plants Products,2002Cajanus cajan (L.) Millsp.]]>Chandra, A. and D. Pental.,2003Chaudhury, D., S. Madanpotra, R. Jaiwal, R. Saini, P.A. Kumar and P.K. Jaiwal,2007Agrobacterium tumefaciens-mediated high frequency genetic transformation of an Indian cowpea (Vigna unguiculata L. Walp.) cultivar and transmission of transgenes into progeny.]]>Cramer, C.S. and T.C. Wehner,2000Cramer, C.S. and T.C. Wehner,2000Ezeaku, I.E. and S.G. Mohammed,2006Fagwalawa, L.D.,2000Ghafoor, A., F.N. Gulbaaz, M. Afzal and M. Arshad,2003Cicer arietinum L.).]]>Henry, A. and G.V. Krishna,1990Ikea, J., I. Ingelbrecht, A. Uwaifo and G. Thottappilly,2003Vigna aconitifolia L. walp) using particle gun method.]]>Iqbal, S., T. Mahmood, M. Tahira, M. Ali, M. Anwar and M. Sarwar,2003Vigna mungo L.).]]>Ivo, N.L., C.P. Nascimento, L.S. Vieira, F.A. Campos and F.J. Aragao,2008Vigna unguiculata) and stable Mendelian inheritance of transgenes.]]>Khan, A., M. Hatam and A. Khan,2000Obembe, O.O.,2009Pasquet, R.,2001Vigna savi.]]>Popelka, J.C., N. Terryn and T.H.V. Higgins,2004Popelka, J.C., S. Gollasch, A. Moore, L. Molvig and T.J.V. Higgins,2006Vigna unguiculata L.) and stable transmission of the transgenes to progeny.]]>Sahoo, L., T. Sushma-Sugla, N.D. Singh and P.K. Jaiwal,2000In vitro plant regeneration and recovery of cowpea (Vigna unguiculata) transformants via Agrobacterium-mediated transformation.]]>Salahuddin, S., S. Abro, M.M. Kandhro, L. Salahuddin and S. Laghari,2010Gossypium hirsutum L.) sympodial.]]>Shrivastava, M.K., R.S. Shukla and P.K. Jain,2001Glycine max L.).]]>Singh, J. and H.S. Yadava,2000Singh, R.K. and B.D. Chaudhury,1985Solleti, S.K., S. Bakshi and L. Sahoo,2008Agrobacterium tumefaciens-mediated transformation.]]>Solleti, S.K., S. Bakshi, J. Purkayastha, S.K. Panda and L. Sahoo,2008Vigna unguiculata) seeds expressing a bean α-amylase inhibitor 1 confer resistance to storage pests, bruchid beetles.]]>Somers, D.A., D.A. Samac and P.M. Olhoft,2003Udensi, O., E.A. Edu, U.J. Umana and E.V. Ikpeme,2011Cajans cajan (L.) Millsp and Vigna unguiculata (L.) Walp): A panacea for sourcing superior genotypes.]]>Udensi, O., E.J. Umana, E.A. Edu and E.V. Ikpeme,2011Udensi, O., E.V. Ikpeme, A.A. Markson, E.A.B. Edu, U.J. Umana and I.S. Urua,2010Umar, M.L., M.G. Sanusi and F.D. Lawan,2010Vigna unguiculata [L] Walp).]]>Vange, T. and O.E. Moses,2009Yadev, G.C., PK. Singh, BB. Singh and R. Verma,2001