Agricultural Science Digest

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Agricultural Science Digest, volume 32 issue 3 (september 2012) : 181 - 186


Rupinder Kaur*, V.K. Saxena
1Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana-141 004, India
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Cite article:- Kaur* Rupinder, Saxena V.K. (2024). GENETICS OF HEAT TOLERANCE TRAITS IN SPRING MAIZE (ZEA MAYS L.). Agricultural Science Digest. 32(3): 181 - 186. doi: .
High temperature or heat stress at the time of pollination is the main problem faced in the cultivation of spring maize under Punjab conditions. The genetic analysis of heat tolerance traits in maize during two spring environments revealed that both additive and dominance variances were significant for the heat tolerance traits studied viz. plant height, ear height, days to 50 % anthesis , days to silking, leaf firing, tassel blast, seed setting, chlorophyll a & b, total chlorophyll content and membrane thermostability. Over dominance was observed for all the traits except proline content. Epistatic interactions were involved in leaf firing, shelling percentage and membrane thermo stability only. Non additive gene action was predominant in the inheritance of majority of the heat tolerance traits. Thus, development of resistant/ tolerant hybrids would be a viable breeding strategy in spring environments.
  1. Dhillon, B.S., Khehra, A.S., Saxena, V.K., Kapoor, W.R. and Batta, R.K., (1983). Realized and expected gain through selection in a maize population. Crop Improvement 10:89-92.
  2. Ellis, R.H., Summerfield R.J., Edmeades, G.O. and Roberts E.M., (1992). Photoperiod, temperature and the interval from sowing to tassel initiation in diverse cultivars of maize. Crop Sci. 32:1225-32.
  3. Hayman, B.I., (1954). The theory and analysis of diallel crosses. Genetics 39:789-809.
  4. Paul, K.K., and Debanth, S.C., (1999). Combining ability analysis in maize (Zea mays L.) Pakistan J. Sci. Industrial Res. 42(3):141-44.
  5. Shovmand, B. and Reynolds. M.P., (2000). Increasing yield potential for marginal areas by exploring genetic resources collection. Plant and Soil 31:67-77.
  6. Vasal, S.K., Srinivaran, G., Beck, D.L., Crossa, J., Pandey, S. and Leon, C. (1992). Heterosis and combining ability of CIMMYT'S tropical late white maize germplasm. Maydica 37:217-23.

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