Asian Journal of Crop Science1994-78792077-2041Asian Network for Scientific Information10.3923/ajcs.2019.32.39VuThi Thuy HangLeThi Tuyet ChamVuDinh HoaNguyenThanh TuanNgocThi22019112Background and Objective: Soybean breeding is striving to develop high yielding cultivars. Understanding of the association between yield and its components and the contribution of those yield components to yield is important to the breeding and selection process. This study sought to determine the correlations, the direct and indirect effects of yield components on grain yields in soybean progenies. Materials and Methods: Two soybean crosses at F_{6} and F_{7} generations were grown in field condition. The correlations and path coefficents of 8 measured traits, viz growth duration (days), plant height (cm), first pod insertion height (cm), ratio of first pod insertion height to plant height, total number of pods per plant, total number of seeds per plant, 100 seed weight (g) and grain yield per plant (g/plant) were computed. Results: There were consistencies of correlations across generations and higher direct and indirect effects in F_{6} than in F_{7}. Most direct effects were in agreement with correlations, indicating true associations. Significant positive correlations (r) and highly positive direct effects on grain yield were observed for total number of pods (r = 0.406-0.928), total number of seeds (r = 0.434-0.939) and 100 seed weight (r = 0.361-0.626) across generations and crosses. Ratio of first pod insertion height to plant height had significant indirect effects on yield via component traits. Conclusion: The selection strategy could be applied in early generations for significant yield components. Besides pod and seed related traits, ratio of first pod insertion height to plant height should also be considered for selection.]]>Vinh, M.Q., D.K. Thinh, D.T. Bang, D.H. At and L.H. Ham,2009Nguyen, B.A.T., Q.T. Nguyen, X.L.T. Hoang, P.T. Nguyen and L.S.T. 2014De Carvalho, C.G.P., C.A.A. Arias, J.F.F. de Toledo, M.F. de Oliveira and N.A. Vello,2002Karasu, A., M. Oz, A.T. Goksoy and Z.M. Turan,2009Glycine max (L.) Merr.].]]>Hakim, L. and S. Suyamto,2017Ferrari, M., I.R. Carvalho, A.J. de Pelegrin, M. Nardino and V.J. Szareski et al.,2018Bekele, A. and G. Alemahu,2011Glycine max (L.) Merrill).]]>Aditya, J.P., P. Bhartiya and A. Bhartiya,2011G. max (L.) Merrill).]]>Board, J.E., M.S. Kang and M.L. Bodrero,2003Nagarajan, D., T. Kalaimagal and E. Murugan,2015Glycine max L. (Merr).]]>Teodoro, P.E., L.P. Ribeiro, C.C.G. Correa, R.A.A. da Luz Jr., A.D.S. Zanuncio, D.P. Capristo and F.E. Torres,2015Machado, B.Q.V., A.P.O. Nogueira, O.T. Hamawaki, G.F. Rezende and G.L. Jorge et al.,2017Cruz, C.D., A.J. Regazzi and P.C.S. Carneiro,2012Wright, S.,1921Dewey, D.R. and K.H. Lu,1959Falconer, D.S. and T.F.C. Mackay,1996Vu, T.T.H., T.H. Nguyen and D.H. Vu,2007Oz, M., A. Karasu, A.T. Goksoy and Z.M. Turan,2009Glycine max) grown in different environments.]]>Carvalho, I.V., M. Nardino, G.H. Demari, V.J. Szareski and D.N. Follmann et al.,2017Sulistyo, A., Purwantoro and K.P. Sari,2018Akintunde, A.,2012Hayes, A.F.,2018Abd El-Mohsen, A.A., G.O. Mahmoud and S.A. Safina,2013Subramanian, S. and M. Subramanian,1994Sesamum indicum L.).]]>Nguyen, D.T., H.T.T. Vu, L.M. Bielig and R.J. Lawn,2016Ribeiro, H.L.C., C.A.F. Santos, L. da Silva Diniz, L.A. do Nascimento and E.D. Nunes,2016Yerimani, A.S., S. Mehetre and M.N. Kharde,20133 and F_{4} populations of pigeonpea (Cajanus cajan (L.) Mill sp.).]]>Tonk, F.A., D. Istipliler, M. Tosun, E. Ilker and C. Gizem,20183 and F_{4} generation of CarmenÃ—Devetuyu-176.]]>Balla, M.Y. and S.E. Ibrahim,2017Glycine max (L.) Merr.] for yield and its components.]]>Ramteke, R., D.H. Singh and P. Murlidharan,2012Glycine max) genotypes for insertion height of the lowest pod, the useful trait for combine harvester.]]>Kang, B.K., H.T. Kim, M.S. Choi, S.C. Koo and J.H. Seo et al.,2017Glycine max (L.) Merr.].]]>Muller, M., M. Rakocevic, A. Caverzan and G. Chavarria,2017