Studies on Heterosis, Residual Heterosis and Inbreeding Depression for Yield and Related Traits in Sorghum (Sorghum bicolor L.)

DOI: 10.18805/ag.D-5249    | Article Id: D-5249 | Page : 53-57
Citation :- Studies on Heterosis, Residual Heterosis and Inbreeding Depression for Yield and Related Traits in Sorghum (Sorghum bicolor L.).Agricultural Science Digest.2022.(42):53-57
Priyamvada Chauhan, Pradeep Kumar Pandey priyam09chauhan@gmail.com
Address : Department of Seed Science and Technology, Teerthankar Mahaveer University, Moradabad-244 001, Uttar Pradesh, India. 
Submitted Date : 31-07-2020
Accepted Date : 23-02-2021


Background: Selection of genotypically superior parents is most challenging task for the development of potential hybrids. In conventional plant breeding, magnitude of heterosis and inbreeding depression has been proved very effective in identifying vigorous parental combinations. 
Methods: The present investigation was carried out to study the heterosis, residual heterosis and inbreeding depression of forty sorghum crosses (F1s and F2s) obtained by crossing of eight restorer lines with five cytoplasmic male sterile lines in Line x Tester mating design in 2013 and 2014. Observations were recorded on morphological traits viz. days to 50% flowering, days to maturity, plant height, flag leaf length, flag leaf width, panicle length, panicle width, panicle weight,1000 seed weight and grain yield per plant. 
Result: Among all crosses, ICSA467 x UPC2 and MR750A2 x UPC2 were found to be best for most of the characters. Inbreeding depression was recorded as significantly positive for plant height for most of the crosses indicates the occurrence of transgressive segregants in F2 generation.


Heterosis Inbreeding depression Line x Tester Residual heterosis Sorghum


  1. Agarwal, M. and Shrotria, P.K. (2005). Heterosis and inbreeding depression in forage sorghum [Sorghum bicolor (L.) Moench]. Indian J. Gene and Pl. Breeding. 65: 12-14. 
  2. Allard, R.W. (1960). Principles of Plant Breeding. John Wiley and Sons, Inc. New York, London. pp. 89-90.
  3. Bhatt, A. (2008). Studies on hetrosis and inbreeding depression in forage sorghum [Sorghum bicolor (L.) moench]. Agric. Sci. Digest. 28(4): 258-261.
  4. Charlesworth, B. and Charlesworth, D. (1999). The genetic basis of inbreeding depression. Genetical Research. 74(3): 329-340.
  5. Charlesworth, D. and WIllis, J. (2009). The genetics of inbreeding depression. Nature Reviews Genetics. 10(1): 783-796.
  6. Chiang, M.S. and Smith, D. (1967). Diallel analysis of the inheritance of quantitative characters in grain Sorghum L. heterosis and inbreeding depression. Canadian J. Genetics and Cytology. 9: 44-51.
  7. Fonseca, S. and Petterson, F. (1968). Hybrid vigour in a seven parent diallel cross in common wheat. Crop Sci. 8(1): 58-88.
  8. Hunter, E. and Anderson, I. (1997). Sweet Sorghum In: Janick J Horticultural Reviews ed. (21 edtn), New York.
  9. Kempthorne, D. (1957). An Introduction to Genetic Statistics. JohnWiley and Sons Inc, New York, U.S.A.
  10. Kumar Surendira, P.S., Kumar Senthil, N., Thangavel, P. and Ganesan, J. (2004). Heterosis and inbreeding depression inseed crop of okra [Abelmoschus esculentus (L.) Moench]. Agricultural Science Digest. 24(4): 271-273.
  11. Rao, N. (1980). Statistics for Agricultural Science. Oxford and IBH Publishing Company, New Delhi (India).
  12. Umakant, A.V., Madhusudhana, R., Latha, K., Madhavi and Swarnalata, K. (2003). Heterosis studies for yield and its components in rabi sorghum [Sorghum bicolor (L.) Moench.]. Indian J. Gene Pl. Breeding. 63: 159-160.

Global Footprints