Assessment of Genetic variability among ethidium bromide-derived genotypes of cowpea (Vigna unguiculata (L.) Walp) at M7 generation
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https://doi.org/10.59287/ijanser.741Keywords:
Cowpea, Genetic Base, , Genetic Diversity, Induced Mutation, TraitsAbstract
An induced mutation is a valuable tool for creating new genetic variability to complement existing germplasm and broaden crop genetic base. Thus, creating genetic diversity is needed for effective plant breeding programs. This study was aimed at evaluating the level of variation of phenotypic traits among ethidium bromide (EtBr)-derived genotypes of cowpea evaluated during the dry season of 2021-2022. Six cowpea genotypes obtained from the Department of Plant Science and Biotechnology, Adekunle Ajasin University, Akungba-Akoko were used in the study. These were evaluated in a randomized complete block design (RCBD) in 3 replicates in the field. The traits measured were emergence percentage, number of leaves/plant, plant height, number of main branches/plant, number of peduncles/plant, peduncle length, pods/plant, pod length, seeds/pod, number of seeds/plant, 100-seed weight, and seed yield/plant. Upon statistical analysis, it was observed that G3 (IT98K-555-1) at a concentration of 0.5% for 16hrs was most suitable to broaden the genetic base of cowpea and can be selected for further breeding programs.
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References
(1) Johnson, H. W., Robinson, H. F., and Comstock, R.E., (1955). Estimates of genetic and environmental variability in soybean. Agronomy Journal, 47 (7): 314 – 318.
(2) Ubi, E. B., Mignouna, H., and Obigbesan, G., (2001). Heritable relationships and variability of yield and yield components in vegetable cowpea. African Crop Science Journal, 3 (1): 23 – 28.
(3) Omoigui, L. O., Ishiyaku, M. F., Kamara, A. Y., Alabi, S. O., and Mohammed, S. G., (2006). Genetic variability and heritability studies of some reproductive traits in cowpea (Vigna unguiculata L. Walp). African Journal of Biotechnology, 5 (13): 1191 – 1195.
(4) Ajayi, A. T., and Adesoye, A. I. (2013). Cluster analysis technique for assessing variability in cowpea (Vigna unguiculata L. Walp) accessions from Nigeria. Ratar. Povrt. 50 (2): 1 – 7.
(5) Ajayi, A. T., Osekita, O. S., and Osaghae, S. O. (2014). Variability among some accessions of cowpea (Vigna unguiculata L. Walp) in Nigeria based on the expression of quantitative traits. Futa Journal of Research in Science (in press).
(6) Vijayan, S., (2005), Statistical analysis of influence of morphological characters on yield in selected vegetable crops. M.Sc. Thesis, Dharwad University of Agricultural Sciences, Dharwad (Thesis).
(7) FAO. (2012). Cowpea (Vigna unguiculata). Retrieved from http://www.fao.org/3/af177e/af177e04.htm
(8) Osekita, O. S., and Ajayi A. T. (2013). Character expression and selection differential for yield and its components in soybean (Glycine max L. Merrill). Academia Journal of Agricultural Research, 1 (7): 167 – 171.
(9) Sivasubramanian, S. and Menon, M. (1973). Genetic variability in pigeonpea (Cajanus cajan (L.) Millsp.). Madras Agricultural Journal, 60(9-12), pp. 1376-1379.
(10) Robinson, H. F., Comstock, R. E., and Harvey, P. H. (1949). Estimates of heritability and degree of dominance in corn. Agronomy Journal, 41(7), pp. 353-359. Nehru, S. D., and Manjunath, A., (2009). Genetic variability and character association studies in cowpea in early and late kharif seasons. Legume Research, 32(4): 290 – 292.
(11) Nehru, S. D., and Manjunath, A., (2009). Genetic variability and character association studies in cowpea in early and late kharif seasons. Legume Research, 32(4): 290 – 292.
(12) Denton, O. A., and Nwangburuka, C. C. (2011). Heritability, genetic advance and character association in six related characters of Solanum anguivi. Asian Journal of Agricultural Research, 5: 201 – 207.
(13) Okezie B. O, Nduka E. O, Uguru M. I. Genotype and environmental variances and the genotype-environment interaction of some yield traits in cowpea. Journal of Agricultural Science and Technology. 2012;14:443-455.
(14) Khan, N. Y., Rehman, S. U., Hussain, M. K., Imran, M., & Ali, N. (2017). Assessment of genetic variability, heritability and genetic advance for morphological and yield contributing traits in maize (Zea mays L.) hybrids. Journal of Agricultural Research, 55(2), 189-199.
(15) Larik A. S., Malik S. I., Kakar A. A., Naz M. A. (2000). Assessment of heritability and genetic advance for yield and yield components in Gossypium hirsutum L. Scientific Khyber 13:39-44.
(16) Singh, B. B., & Ajeigbe, H. A. (2011). Improving Crop Productivity in Sustainable Farming Systems in Sub-Saharan Africa: Learning from Case Studies. Journal of Crop Improvement, 25(5), 473-486.
(17) Singh, S., Singh, B. P., & Singh, D. (2015). Correlation studies for seed yield and its attributing traits in cowpea [Vigna unguiculata (L.) Walp.]. Legume Research, 38(3), 366-370
