Genetic analysis of yield and its biometric traits in castor (Ricinus communis L.)

S.B. Sakhare
Priya Pardeshi
R.N. Udasi
M.B. Nagdeve
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Abstract

The genetics of seed yield and its components was studied in castor (Ricinus communis L.) utilizing three crosses viz., 
AKC-1 x RG1636 (Cross - I); Aruna x RG1636 (Cross-II) and AKD-1 x RG1636 (Cross-III) through generation mean 
analysis. The additive-dominance model was found to be adequate for days to maturity of primary spikes in cross II (Aruna 
x RG1636) indicating the absence on non- allelic interactions. Additive (d) gene actions along with epistatic gene 
interactions were found to be significant for effective length of secondary spikes, oil content  in the cross I (AKC-1 x 
RG1636);  total number of capsules, 100 seed weight in the cross III (AKD-1 x RG1636), while rest of the characters were 
found to be governed by non additive gene actions. The classification of gene actions showed the importance of duplicate 
type of gene action for most of the characters in all the three crosses.  Breeding  procedures  involving  either  multiple  
crosses  or  biparental  crosses  may  be resorted to get transgressive segregants. 

Keywords Castor, generation mean analysis; scaling tests, additive, dominance, epistatic gene interactions
Published 18/03/26