Vol. 7 (1) : January-February 2016 issue
Green Farming Vol. 7 (1) : 1-7 ; January-February, 2016
Combining ability & heterosis studies for yield & component traits in forage sorghum (Sorghum bicolor (L.) Moench)
PANKAJ KUMAR1* and P.K. SHROTRIA2
Deptt. of Genetics and Plant Breeding, College of Agriculture, G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, Udham Singh Nagar (Uttarakhand)
Designation : 1Ph.D. Scholar *(vaidya.pankaj4@gmail.com), 2Professor
Subject : Crop Genetics and Plant Breeding
Paper No. : P-3342
Total Pages : 7
Received : 16 February 2015
Revised accepted : 24 December 2015
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Citation :
PANKAJ KUMAR and P.K. SHROTRIA. 2016. Combining ability & heterosis studies for yield & component traits in forage sorghum (Sorghum bicolor (L.) Moench). Green Farming Vol. 7 (1) : 1-7 ; January-February, 2016
ABSTRACT
The present investigation was carried out to study the combining ability and heterosis of fifty crosses made by crossing five sudan grass pollinators with ten cytoplasmic male sterile lines in a line x tester mating design in forage sorghum [Sorghum bicolor (L.) Moench]. The analysis for combining ability revealed significant mean sum of squares of both general combining ability (GCA) and specific combining ability (SCA) for most of the characters indicated presence of both additive and non-additive gene actions. The parental genotypes 32 A2, MR 750 A2 and PC 6, crosses 32 A2 x PC 6 and MR 750 A2 x HC 26 PC 6 were good general and specific combiners with greater heterotic effects for green and dry fodder yield, respectively. These parental genotypes and their crosses could be used further in breeding programme for selection and enhancement of yield after multilocation testing in sorghum.
Key words :
General combining ability, Heterosis, Line x tester, Sorghum bicolor, Specific combining ability.
