V. INHERITANCE OF RESISTANCE TO GROUNDNUT ROSETTE DISEASE IN
5.5 Conclusion
In both parents and segregating populations there was no immunity recorded for groundnut rosette disease. Both GCA and SCA were significant indicating that both additive and non-additive gene action were important in the expression of resistance to groundnut rosette disease. GCA:SCA ratio was close to unity suggesting that GCA effects were more important than SCA effects. This indicated the predominance of additive gene action in the inheritance of groundnut rosette disease. Groundnut rosette disease was controlled by two recessive genes. However, some genetic modifiers may also be present and influence disease expression.
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