Differential response of commercial hybrid and open pollinated maize seeds to mechanical damage during seed processing

  • Babafemi S. OLISA National Agricultural Seeds Council, Central Seed Testing Laboratory, Km 29 Abuja Lokoja Express way, P.M.B 716 Garki (NG)
  • Femi E. AWOSANMI Obafemi Awolowo University, Faculty of Agriculture, Department of Crop Production and Protection, Seed Science Laboratory, Ile-Ife (NG)
  • Michael S. AKINROPO Obafemi Awolowo University Nigeria, Faculty of Science, Department of Botany, Plant Physiology Units, Ile-Ife (NG)
  • Philip O. OJO National Agricultural Seeds Council, Central Seed Testing Laboratory, Km 29 Abuja Lokoja Express way, P.M.B 716 Garki (NG)
  • Khalid ISHIAK National Agricultural Seeds Council, Central Seed Testing Laboratory, Km 29 Abuja Lokoja Express way, P.M.B 716 Garki (NG)
  • Abdul DANLAMI National Agricultural Seeds Council, Central Seed Testing Laboratory, Km 29 Abuja Lokoja Express way, P.M.B 716 Garki (NG)
  • Nwakaku J. EGBO National Agricultural Seeds Council, Central Seed Testing Laboratory, Km 29 Abuja Lokoja Express way, P.M.B 716 Garki (NG)
  • Christiana U. OKEKE National Agricultural Seeds Council, Central Seed Testing Laboratory, Km 29 Abuja Lokoja Express way, P.M.B 716 Garki (NG)
Keywords: deterioration, harvesting, germination, leachate, physiological, triphasic

Abstract

Hybrids and open pollinated varieties (OPVs) are two commercial maize seed types cultivated in Nigeria. Information on their response to mechanical damage during processing is limited. This study is thus aimed at assessing the response of hybrids and OPVs of maize seeds to mechanical damage which would facilitate fabrication of processing facilities suitable for either of the maize types. Six maize varieties: three hybids (‘New Kaduna’, ‘SDM-1’, and ‘JO-195’) and three OPVs (‘Sammaz 15’, ‘Sammaz 27’ and ‘Suwan-1-stry’) were used for the study. The seed samples were subjected to standard germination, seedling vigour analysis, accelerated ageing, conductivity and fast green tests. The result showed that all the hybrid seed varieties had more damaged seeds than their OPVs counterpart. Shoot length and root length were more affected than other parts of the seedling. There were differences in the magnitude of electrolyte leakage as well as in what time each seed type (hybrid or OPVs) passed through the phases with ‘JO-195’ having the highest rate of electrolyte leakage. Hybrid seeds had lower resistance to mechanical damage and poorer storability when compared with the OPVs. In the overall, for all the traits, ‘Sammaz 15’, the best among OPVs was more promising when compared with ‘SDM-1’ which was the best among hybrid varieties. Processing machine equipment and accessories that are suitable for hybrid seeds might be inappropriate for conditioning OPVs.

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Published
2021-12-09
How to Cite
OLISA, B. S., AWOSANMI, F. E., AKINROPO, M. S., OJO, P. O., ISHIAK, K., DANLAMI, A., EGBO, N. J., & OKEKE, C. U. (2021). Differential response of commercial hybrid and open pollinated maize seeds to mechanical damage during seed processing. Notulae Scientia Biologicae, 13(4), 10738. https://doi.org/10.15835/nsb13410738
Section
Research articles
CITATION
DOI: 10.15835/nsb13410738