Ranju Kumari A. K. Singh Sugandh Suman


The present investigation was carried out for studying heterosis and inbreeding depression of twenty eight hybrids (F1 ʼ s) and their F2 ʼ s made by crossing of eight maize inbreds in all possible cross combinations excluding reciprocal. Observations were recorded on ten quantitative traits viz., plant height (cm), ear length (cm), ear girth (cm), number of kernel rows per ear, number of kernels per row, 100 kernels weight (g) yield per plant (g), days to 50 % tassel emergence, days to 50% silk emergence and days to 50% maturity. Variable magnitude of heterosis was observed for different cross combinations for all the traits. Based on higher mean performance (94.33 to 118.67 g/plant) and higher heterotic response (11.95 to 30.48%) eleven crosses were selected. Response of inbreeding depression was significant in positive direction for most of the traits. Among these eleven crosses five crosses CM 300 x CML 142, CM 300 x CML 144, CM 300 x CML 150, CM 300 x CML 176 and CML 150 x CML 144 were selected having high heterotic value (12.31 to 30.48%) and lower inbreeding depression (less than 15%) for their utilization in maize improvement programme for the development of superior inbred lines.


Download data is not yet available.


Metrics Loading ...




Heterotic value, Inbreeding depression, Maize, Quantitative studies, Zea mays

Agricultural Statistics at a glance (2014). Agricultural Statistics Division, Directorate of Economics and Statistics, Department of Agriculture and Co-operation, Ministry of Agriculture, Govt. of India.
Andreolic, C. Carvalho, C.C. and Andrade, R.V. de. (2006). Yield losses due to inbreeding and the use of molecular markers (RAPD) for assessment of genetic purity in hybrid corn (Zea mays L.). Revista Brasileira-de-Milho-e-Sorgo, 5 (1) : 1-14.
Aramendiz Tatis, H., Espitia Camacho, M. and Navarro Ramos, G.( 2004). Inbreeding depression of maize hybrids (Zea mays L.) in the SinuVollay of Colombia. Agricultura- Tecnica – en – mexico, 30 (2) : 139-144.
Bhatnagar, S., Betran, F.J. and Rooney, L.W. (2004). Combining abilities of quality protein maize inbreds. Crop Science, 44 (6) : 1997-2005.
Dubey, R.B., Joshi, V.N. and Verma, M. (2009). Heterosis for nutritional quality and yield in conventional and non-conventional hybrids of maize (Zea mays L.). Indian J. Genet.,69 (2) : 109-114..
Kllaria, R.K. and Sharma, A.K.( 2006). Heterobeltiosis and inbreeding depression in barley (Hordeum Vulgare L.) Indian J. Genet., 66 (1) : 41-42.
Kumar, P., Godawat, S.L., Vyas, M. and Pandiya,N.K. (2008). Performance of maize (Zea mays) genotypes in different ecological systems. Indian Journal of Agricultural Sciences, 78 (11) : 939-42.
Kumar, P.P. and Satyanarayana, E. (2006). Heterosis for yield and yield components in full season maize genotypes. Indian Journal of Dryland Agricultural Research and Development,21 (1) : 88-90.
Kumar, C. and Singh, S. P. (2016). Heterosis and inbreeding depression to identify superior F1 hybrids in tomato (Solanum lycopersicum L.) for yield and its contributing traits. Journal of Applied and Natural Science, 8(1) : 290-296
Kumar, R. S., Shahi, J. P. and Srivastava, K. (2013). Estimation of heterosis in field corn and sweet corn at marketable stage. The Bioscan. 8 (4):1165-1170.
Kumari, R. (2013). Manifestation of heterosis in relation to ggenetic divergence and isozyme pattern in maize (Zea mays L.). Thesis submitted to Rajendra Agricultural University, Bihar, Pusa for award the Ph. D. Degree.
Kumari, P., Jaiswal, H. K. and Woza, S. K. (2014). Combining ability and heterosis for yield, its component traits and some grain quality parameters in rice (Oryza sativa L.), Journal of Applied and Natural Science, 6(2):495-506
Kumari, R., Singh, A. K., and Sharma, V. K. (2016). Heterosis and genetic divergence correlation studies for yield and its related traits in maize (Zea mays L.). The Bioscan, 11 (3) : 1849-1854
Maldonado, F.A.A. and Miranda Filho, J.B. de. (2002). Inbreeding depression in maize population of reduced size. Scientia Agricola, 59 (2) : 335-340.
Manpreet, B., Verma, S.S., Kumar, A., Kabdal, M.K., Aditya, J.P. and Ashish, N. (2007). Combining ability analysis and heterosis estimates in high quality protein maize inbred lines. Indian Journal of Agricultural Research, 41 (1) : 49-53.
Marker, S. and Krupakar, A. (2009). Genetic divergence in exotic maize germplasm (Zea mays L.). ARPN Journal of Agricultural and Biological Science, 4 (4) : 44-46.
Meredith, W. R. and Bridge, R. R. 1972. Heterosis and gene action in cotton Gossipium hirsutam. Crop Sci. 12: 304-310
Nigussie, M. and Zelleke, H. (2001). Heterosis and combining ability in a diallel among eight elite maize population. African Crop Science Journal, 9 (3) : 471-479.
Oliboni, R., Faria, M. V., Neumann, M., Battistelli, G. M., Tegoni, R. T. G. and Resende, J. T. V. de. (2012). Genetic divergence among maize hybrids and correlation with heterosis and combining ability. Acta Scientiarum. 34(1): 37-44
Om Prakash, Shanti P., Satyanarayan E. and Saikumar R. 2006. Exploitation of genetic variability for quality traits and agronomic characters in quality protein maize (QPM) germplasm (Zea mays L.) Ann. Agric. Res. New Series, 27 (3) : 240-244.
Premlatha, M. and Kalaman,i A.( 2009). Heterosis and combining ability studies for grain yield and its related traits in maize (Zea mays L.). Maysore J. Agric. Sci., 43(1):62-66
San Vicente, F.M. and Hallauer A.R. (1993). Inbreeding depression rates of materials derived from two groups of maize inbred lines. Revista Brasileira de Genetica, 16 (4) : 989-1001.
Shull G.H.(1914).Duplicate genes for capsule form in Bursabursa pastoris. Z. Ind. Abst.Vereb, 12 : 97-149.
Simon, G.A., Scapim, C.A., Pacheco, C.A.P., Pinto, R.J.B., Braccin,i A. de L.E. and Tonet, A.(2004). Inbreeding depression in popcorn population.Bragantia,63(1):55-62
Singh, A.K., Shahi, J.P. and Rakshit, S. (2010). Heterosis and combining ability for yield and its related traits in maize (Zea mays ) in contrasting environments. Indian Journal of Agricultural Sciences, 80 (3) : 248-249.
Singh, R.D. and Khalid,i G.A. (2002). Inbreeding depression in synthesized population of maize (Zea mays L.). New Botanist, 29 ( ¼ ) : 141-148.
Sofi, P.A., Rathe,r A.G. and Zahoor, D. (2007). Association of heterosis expression for grain yield and its component trait in maize (Zea mays L.) International Journal of Agricultural Research, 2 (5) : 500-503.
Citation Format
How to Cite
Kumari, R., Singh, A. K., & Suman, S. (2018). Quantitative studies on heterosis and inbreeding depression in maize (Zea mays l.). Journal of Applied and Natural Science, 10(1), 64-69. https://doi.org/10.31018/jans.v10i1.1580
More Citation Formats:
Research Articles