International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 3
First page : (922) Last page : (933)
Article doi: http://dx.doi.org/10.18782/2320-7051.3060
Study on Heterosis and Combining ability in Interspecific Hybrids of Cotton (G. hirsutum x G. barbadense)
Abasianyanga Isong*, Amala Balu and Ravikesavan R.
Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore – 641003, India
*Corresponding Author E-mail: isongplus@yahoo.com
Received: 30.05.2017 | Revised: 9.06.2017 | Accepted: 10.06.2017
ABSTRACT
Exploitation of heterosis is common practice in both self and cross pollinated crops. The development of superior and high yielding hybrids are essential due to increasing demand of natural fibre products for which superior quality parameters like fibre length, strength, elongation, micronnaire and uniformity ratio determines the spinnability in the modern mills. This study sought to harness the expression of hybrid vigour from 48 interspecific F1 hybrids and to prescribe good combiners amongst eight hirsutum and six babadense parents in a Line x Tester fashion. Highly significant differences among genotypes, F1 hybrids and parents were observed in all the characters and some quality parameters. Seed cotton yield per plant varied between 112.29g to 230.74g and hybrid TCH1819 X TCB37 gave the highest yield per plant of 230.74g. Highly significant positive heterobeltiosis and standard heterosis were exploited for seed cotton yield in all the hybrids, however, MCU7 X TCB209, MCU7 X DB3, TCH1777 X TCB26 and MCU9 X CCB36 were identified for best heterotic effect in seed cotton yield for both heterobeltiosis and standard heterosis. MCU9 X SUVIN and TCH1716 X CCB36 displayed the best heterosis in Micronnaire. TCH1819 and TCB37 showed best Line and Tester combiners respectively having the highest positive gca for seed cotton yield and micronnaire. TCH1819 X TCB37 and TCH1777 X TCB26 also were identified as the best sca for both yield and quality which can be exploited by selection
Key words: Cotton, Heterosis, Combining ability, Interspecific, Hybrids.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Isong, A., Balu, A. and Ravikesavan, R., Study on Heterosis and Combining ability in Interspecific Hybrids of Cotton (G. hirsutum x G. barbadense), Int. J. Pure App. Biosci.5(3): 922-933 (2017). doi: http://dx.doi.org/10.18782/2320-7051.3060
