ASSESSMENT OF HETEROSIS AND INBREEDING DEPRESSION FOR GRAIN YIELD AND ITS ASSOCIATED TRAITS IN MAIZE (Zea mays L)

VISHWANATH¹*, LOKENDRA SINGH², P.C. YADAV³, SANJEEV KUMAR⁴, H.C. SINGH⁵, R.K. YADAV⁶, YOGESH PANDEY⁷, SARVENDRA GUPTA^8
1Department of Genetics and Plant Breeding, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, 208002, Uttar Pradesh, India
²Department of Genetics and Plant Breeding, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, 208002, Uttar Pradesh, India
³Department of Genetics and Plant Breeding, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, 208002, Uttar Pradesh, India
⁴Department of Genetics and Plant Breeding, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, 208002, Uttar Pradesh, India
⁵Department of Genetics and Plant Breeding, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, 208002, Uttar Pradesh, India
⁶Department of Genetics and Plant Breeding, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, 208002, Uttar Pradesh, India
⁷Department of Genetics and Plant Breeding, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, 208002, Uttar Pradesh, India
⁸Department of Genetics and Plant Breeding, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, 208002, Uttar Pradesh, India
* Corresponding Author : vishwa8159@gmail.com

Received : 08-06-2018     Accepted : 23-06-2018     Published : 30-06-2018
Volume : 10     Issue : 12       Pages : 6398 - 6404
Int J Agr Sci 10.12 (2018):6398-6404

Keywords : F2 generation, Heterosis
Conflict of Interest : None declared
Acknowledgements/Funding : Author thankful to Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, 208002, India
Author Contribution : All author equally contributed

In the present study, ten parents were crossed in half diallel fashion to evaluate, 45 F1, hybrids and 45 F2 cross combinations for assessment of heterosis and inbreeding depression for yield and its associated traits using Randomized Complete Block Design with three replications. Highly significant differences were observed among the F1 and F2 for eight characters. The crosses CIMMYT (K-13)*TSK-44, TSK-44*TSK-10 and TSK-27*TSK-109 were exhibited higher heterosis over economic parents AZAD UTTAM along with considerable inbreeding depression indicating that this cross could be suitable for exploitation of hybrid vigour for grain yield per plant. Six out of nine significance heterosis with comparatively higher magnitude of heterosis, viz., CIMMYT (K-13)*TSK-44, TSK-44*TSK-10, TSK-27*TSK-109, TSK-109*TSK-110, TSK-110*TSK-99 and TSK-109*TSK-99 also exhibited high SCA effect along with deterioration in their performance in F2 generation for most of the crosses. Negative estimates of heterotic effects were observed in some traits may be attributed to inter-allelic interactions.

1. Gautam S.R., Ojha B.R., Ghimire S.K. and Gurung D.B. (2013) Agronomy Journal of Nepal (Agron JN), 3, 172-180.
2. Joshi V. N., Pandiya N. K. and Dubey R. B. (2002) Indian Journal of Genetics and Plant Breeding, 62(1), 15-20.
3. Kumar P.G., Prashanth Y., Reddy S.N., Kumar S.S. and Rao P.V. (2014a) International Journal of Pure and Applied Bioscience, 2(1), 106-111.
4. Kumara B.S., Ganesan K.N., Nallathambi G. and Senthil N. (2013) Madras Agric. J.,100 (1-3), 52-56.
5. Muhammad Irshad-ul-Haq, Muhammad Siddique, Saeeda Khanum and Naveed Kamal (2015) International Journal of Biology and Biotechnology, 12(4), 601-606.
6. Ruswandi D., Supriatna J., Makkulawu A.T., Waluyo B., Marta H., Suryadi E. and Ruswandi S. (2015) Asian Journal of Crop Science, 7, 19-33.
7. Turner J. K. (1953) Agronomy Journal, 45, 487-490.