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Proceeding Paper

Genetic Variability for Mesocotyl Length in Maize †

1
Department of Crop Production and Horticulture, School of Agriculture, Lagos State Polytechnic, Ikorodu 100001, Nigeria
2
Centre of Excellence in Agricultural Development and Sustainable Environment (CEADESE), Federal University of Agriculture, Abeokuta 110124, Nigeria
*
Author to whom correspondence should be addressed.
Presented at the 1st International Electronic Conference on Plant Science, 1–15 December 2020; Available online: https://iecps2020.sciforum.net/.
Academic Editor: Yoselin Benitez-Alfonso
Biol. Life Sci. Forum 2021, 4(1), 26; https://doi.org/10.3390/IECPS2020-08781
Published: 1 December 2020
(This article belongs to the Proceedings of The 1st International Electronic Conference on Plant Science)
The possibility of developing deep-sowing tolerant (DST) maize to absorb moisture from subsoil zones is crucial to maize adaptation to water-stressed environments. The function of the mesocotyl in field emergence of seedlings is established in grasses. However, information is scarce on the extent of genetic variability for mesocotyl length (ML) in maize. Sixty-eight maize genotypes were studied using Completely Randomised Design in a laboratory experiment to investigate the extent of genetic variability for ML, and the relationship of seed biochemical components with ML. Ten seeds of each genotype were germinated for 10 days in the dark. Mesocotyl length was determined by placing cut mesocotyl against a flexible measuring tape. Biochemical contents of seeds were determined at a standard diagnostic laboratory. Analysis of variance revealed highly significant (p ≤ 0.01) genotype mean square, indicating sufficient variability for genetic improvement. Broad-sense heritability and genetic advance were high and implied that ML was heritable. Mean ML for genotypes ranged from 0.58 to 9.02 cm; thus, planned crosses can be made for ML improvement. A dendrogram from cluster analysis based on Ward’s minimum variance cluster analysis classified 65 of the genotypes into clusters I, II, and III with ML (mean ± standard deviation) of 0.49 ± 0.18, 4.25 ± 0.96, and 9.16 ± 0.93 cm, respectively. All the measured biochemical parameters, except selenium, showed significant (p ≤ 0.05/0.01) associations with ML. Crosses can be planned involving genotypes from clusters 1 and III, to exploit heterosis for ML in a hybrid program. The results obtained from this study provide a basis for the development of DST maize for drought-prone environments. View Full-Text
Keywords: adaptation; cluster; dendrogram; drought; heritability; maize; mesocotyl; variability adaptation; cluster; dendrogram; drought; heritability; maize; mesocotyl; variability
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MDPI and ACS Style

Oyetunde, O.A.; Godonu, K.G.; Adeboye, K.A. Genetic Variability for Mesocotyl Length in Maize. Biol. Life Sci. Forum 2021, 4, 26. https://doi.org/10.3390/IECPS2020-08781

AMA Style

Oyetunde OA, Godonu KG, Adeboye KA. Genetic Variability for Mesocotyl Length in Maize. Biology and Life Sciences Forum. 2021; 4(1):26. https://doi.org/10.3390/IECPS2020-08781

Chicago/Turabian Style

Oyetunde, Oyeboade A., Kolawole G. Godonu, and Kehinde A. Adeboye. 2021. "Genetic Variability for Mesocotyl Length in Maize" Biology and Life Sciences Forum 4, no. 1: 26. https://doi.org/10.3390/IECPS2020-08781

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