Journal of Plant Physiology & PathologyISSN: 2329-955X

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Research Article, J Plant Physiol Pathol Vol: 4 Issue: 2

Heterosis and Inbreeding Depression in Tropical Sweet Sorghum (Sorghum bicolor (L.) Moench)

Sudhir Kumar I1*, Srinivasa Rao P2, Belum VS Reddy2,Ravindrababu V3 and Reddy KHP3
1Department of Plant Breeding, Acharya N. G. Ranga Agricultural University, Agricultural Research Station, Peddapuram-533 437, Andhra Pradesh, India
2International Crops Research Institute for the Semi-Arid Tropics, Patancheru,Hyderabad-502 324, Andhra Pradesh, India
3Acharya N. G. Ranga Agricultural University, Agricultural College, Tirupati-517502, Andhra Pradesh, India
Corresponding author : I. Sudhir Kumar
Scientist, Plant Breeding, Agricultural Research Station, Acharya N. G. Ranga Agricultural University, Peddapuram -533 437, East Godavari District, Andhra Pradesh, India
Tel: +91-9959792568
Received: January 06, 2016 Accepted: March 22, 2016 Published: March 29,2016
Citation: Kumar S, Rao S, Reddy BVS, Ravindrababu V, Reddy KHP (2016) Heterosis and Inbreeding Depression in Tropical Sweet Sorghum (Sorghum bicolor (L.) Moench). J Plant Physiol Pathol 4:2.. doi:10.4172/2329-955X.1000147


An investigation carried out during two seasons viz., rainy 2009 and rainy 2010 to study heterosis and inbreeding depression of four crosses of sweet sorghum (Sorghum bicolor (L.) Moench) and their F2 have revealed positive mid-parent and better parent heterosis for majority of the characters. Sugar yield was found to be most heterotic trait, as all the crosses depicted significant positive heterosis over their mid parent and better parent values in case of all the contributing characters indicating dominance gene action. Further high inbreeding depression for sugar yield reflected high heterosis during the two seasons for all the crosses suggesting the operation of non-additive gene action.

Keywords: Sweet sorghum; Heterosis; Inbreeding depression; Sugar yield

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