Genetic Analysis of Some Agronomic Traits in Okra (Abelmoschus esculentus L. [Moench])
Genetic Analysis of Some Agronomic Traits in Okra (Abelmoschus esculentus L. [Moench])PDF
Authors: Muyideen Oluseyi Olayiwol, Deborah Doyinsola Olaniran
Volume/Issue: Volume 23: Issue 1
Published online: 26 May 2020
A study was carried out at the Federal University of Agriculture Abeokuta, Nigeria to determine the gene action underlying the inheritance of important agronomic traits as well as the general combining ability (GCA) and specific combining ability (SCA) of the parents and hybrids, respectively. Ten hybrids were developed by crossing five lines to two testers. The hybrids and parents were evaluated on the field in a randomised complete block design replicated three times, and data were collected on days to 50% flowering, number of branches, stem diameter, plant height, pod length, pod width, pod weight, number of pods and pod yield. The data were subjected to line by tester analysis and results showed substantial variability among the genotypes for some of the characters measured. Days to 50% flowering, number of pods and pod yield were largely under additive gene action while non-additive gene action was more important in the inheritance of plant height. Favourable GCA and SCA effects for days to 50% flowering were observed in NGB00356, NGB00326 and NGB00347 × NGB00326, respectively. The tester NGB00326 had a positive and significant GCA effect for number of pods while the highest positive SCA effect for pod yield was found in NGB00297 × NGB00326. Thus, NGB00356 and NGB00326 could be considered as sources of alleles for development of early maturing while the cross NGB00297 × NGB00326 could be exploited for high yielding okra genotypes.
Keywords: earliness, high yielding, hybrids, okra
AHIAKPA, J.K. – KALEDZI, P.D. – ADI, E.B. – PEPRAH, S. – DAPAAH, H.K. 2013. Genetic diversity, correlation and path analyses of okra (Abelmoschus spp. (L.) Moench) germplasm collected in Ghana. In International Journal of Development and Sustainability, vol. 2, 2013, no. 2, pp. 1396–1415.
ARORA, D. – JINDAL, S.K. – GHARI, T.R. 2007. Generation mean analysis for earliness related traits in Okra (Abelmoschus esculentus (L). Moench). In Journal Genetics and Breeding, vol. 61, 2007, pp. 1–7.
BADU-APRAKU, B. et al. 2015. Heterotic responses among crosses of IITA and CIMMYT early white maize inbred lines under multiple stress environments. In Euphytica, vol. 204, 2015, no. 3, pp. 245–262. doi: 10.1007/s10681-015-1506-0.
KEMPTHORNE, O. 1957. An introduction to genetic Statistics. New York : John Wiley and Sons, 1957.
KUMAR, N. 2006. Breeding of Horticultural Crops. New Delhi : New India Publishing, 2006.
KUMAR, S. – DAGNOKO, S. – HAOUGUI, A. – RATNADASS, A. – PASTERNAK, D. – KOUAME, C. 2010. Okra (Abelmoschus spp) in West and Central Africa: Potential and progress on its improvement. In African Journal of Agricultural Research, vol. 5, 2010, no. 25, pp. 3590–3598.
NWANGBURUKA, C. C. – DENTON, O.A. – KEHINDE, O.B. – OJO, D.K. – POPOOLA, A.R. 2012. Genetic variability and heritability in cultivated okra [Abelmoschus esculentus (L.) Moench]. In Spanish Journal of Agricultural Research, vol. 10, 2012, no. 1, pp. 123–129.
OYETUDE, O.A. 2015. Genetics and Inter-character Relationships in a Population of Sixteen F1-hybrids of Okra (Abelmoschus esculentus L. (moench)), arising from Biparental crosses. M. Agric. Abeokuta : Thesis, Federal University of Agriculture, 2015.
PRAKASH, M. – KUMAR, M.S. – SARAVANAN, K. – KANNAN, K. – GANESAN, J. 2002. Line × tester analysis in okra. In Annals of Agricultural Research 23: 233-237.
RASHID, M. – CHEEMA, A. A. – ASHRAF, M. 2007. Line × tester analysis in basmati rice. In Pakistan Journal of Botany, vol. 39, pp. 2035-2042.
REDDY, M. T. – BABU, K.H. – GANNESH, M. – BEGUN, H. – DILIPHABU, J. – REDDY, R. S. K. 2013. Gene action and combining ability of yield and its components for late kharif season in okra (Abelmoschus esculentus (L.) Moench). In Chilean Journal of Agricultural Research, vol. 73, 2013, no. 1, pp. 0718–5839.
REWALE, V. S. – BENDALE, V.W. – BHAVE, S. G. – MADAV, R. R. – JADHAV, B. B. 2003. Combining ability of yield and yield components in okra. In Journal of Maharashtra Agricultural University, vol. 28, 2003, pp. 244–246.
SHUSMITA, M. – DAS, N.D. 2003. Combining ability studies in okra. In Journal of Interacademicia, vol. 7, 2003, no. 4, pp. 382–387.
SINGH, R.H. – CHOUDHARY, B.D. 1985. Biometrical methods in quantitative genetics analysis. New Delhi : Kalyani Publishing, 1985.
WEERASKAR, D. 2006. Genetic analysis of yield and quality parameters in okra (Abelmoschus esculentus (L) Moench). Dharward : M. Agric Thesis, University of Agricultural Science, 2006.