A Manual on Heterosis and Diallel Analysis
Half diallel mating in tomato
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Plant breeding remains an important component of global efforts to enhance crop productivity for the ever-growing human population. Thorough knowledge of various plant breeding methods is essential to design and implement breeding programmes. Selection of parents and knowledge of gene action of characters to be incorporated or improved are vital for crop improvement programme.The diallel analysis is one such technique.This analysis evaluates inbreds for their breeding value and provides adequate information about the gene action, thereby helping in selection of suitable parents and breeding me...
Plant breeding remains an important component of global efforts to enhance crop productivity for the ever-growing human population. Thorough knowledge of various plant breeding methods is essential to design and implement breeding programmes. Selection of parents and knowledge of gene action of characters to be incorporated or improved are vital for crop improvement programme.The diallel analysis is one such technique.This analysis evaluates inbreds for their breeding value and provides adequate information about the gene action, thereby helping in selection of suitable parents and breeding method. This manual describes the half diallel technique taking tomato as an example for estimation of heterosis, combining ability and genetic components for various traits. Here, the Griffing's numerical approach and Hayman's graphical approach are discussed simultaneously to understand the genetic behaviour of various traits. The use of information generated from such experimentations for formulation of effective crop improvement strategies is also discussed in length.
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