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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(7): 2473-2480
DOI: https://doi.org/10.20546/ijcmas.2020.907.290


Combining Ability and Heterosis in Sugarcane for Early Selection Traits
Y. Bharathi1*, Firdoz Shahana2, T. Prabhakar Reddyand M. Vijaykumar3
1Department of Seed Science and Technology, Seed Research and Technology Centre, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad-500030, India
2Regional Sugarcane and Rice Research Station, Rudrur, Nizamabad (Dist), India
3Agriculture Research Station, Basanthapur, Telangana state, India
*Corresponding author
Abstract:

The present study on sugarcane cross derivatives involving ‘Co’ clones, it was found that specific combining ability was more important than general combining ability for number of millable canes (NMC),cane thickness and HR brix. The inbred 83 R 23 (1148-13-11-2-255) was the best general combiner for NMC, 97 R 401 (1148-S5-242-3) for cane thickness and Co 98008, Co C 671 and Co 0240,1148-S4-242-1, 148-S5-242-3 and Co 0209 for HR brix. Contribution of line × tester interaction to the total variance for NMC was the highest (69.85%) followed by that of lines (29.48%). Lines (43.85%) and line ×tester interaction (44.10%) contributed equally to the total variance for HR brix whereas lines (65.33%) contributed higher towards cane thickness. Among the inbreds, 1148- S5-242-3 was the best general combiner for cane thickness and HR brix, the selection criteria important for cane yield and sugar yield, respectively. Among the testers, Co 0209 was found to be a good combiner for HR brix. Three crosses, viz.1148-13-11-2-251 x Co 0209, 1148-13-11-2-255 x Co 62198 and 1148-13-11-2- 255 x Co 775 were specific combiners for NMC. For cane thickness, 1148-S4-242-1 x Co 0209 was the best specific combiner. The crosses 1148-S5-242-3 x Co 0209 and 1148-S5-242-5 x Co 62198 were found to be the best specific combiners for HR brix. Superior specific combiners for NMC and cane thickness were of the crosses involving poor general combiners whereas those for HR brix were of both good and poor general combiners. The cross 1148-13-11-2-255 x Co 775 showed the highest desirable heterosis for NMC (85.28% relative heterosis and 58.00% heterobeltiosis) followed by 1148-S5-242-3 x Co 62198 (82.67% relative heterosis and 52.22% heterobeltiosis). The highest levels of relative heterosis (8.51%) and heterobeltiosis (4.08%) for cane thickness were recorded for 1148-13-11-2-251 x Co 62198. Crosses 1148-S4-242-1 x Co 0209, 1148-S5-242-3 x Co 0209 and 1148-S5-242-5 x Co 62198 recorded significant relative heterosis and heterobeltiosis for HR brix in the desired direction.


Keywords: Sugarcane, Inbreds, Combining ability, Heterosis, Millable canes, Cane thickness, HR brix
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How to cite this article:

Bharathi, Y., Firdoz Shahana, T. Prabhakar Reddy and Vijaykumar, M. 2020. Combining Ability and Heterosis in Sugarcane for Early Selection Traits.Int.J.Curr.Microbiol.App.Sci. 9(7): 2473-2480. doi: https://doi.org/10.20546/ijcmas.2020.907.290