Indian Society of Genetics & Plant Breeding

Genetic analysis of important morpho-ecomonic traits in periwinkle [Catharanthus roseus (L.) G. Don]

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The experiment was conducted with six diverse genotypes
including one 0.5% EMS induced mutant and one released
white with cream center cultivar 'Nirmal' and one recently
released white petal with pink center cultivar 'Prabal' of
periwinkle
[Catharanthus roseus (L) G. Don] to seek the
genetic information on leaf alkaloid yield by using diallel
analysis. Analysis of variance for 6 x 6 diallel cross
progenies revealed highly significant differences among
treatments (inclusive of direct and reciprocal F
1s and the
parents) for all the traits. This study revealed that medium
x medium and medium x high performing parents provided
the best cross combination for the production of high
leaf alkaloid yielding lines. Based on three analyses,
namely graphical, variance component and combining
ability, both additive and non-additive genetic variances
were found important in the inheritance of alkaloid yield
and other yield contributing characters although
non-additive component was higher than the additive
component for most of the characters except for leaf-stem
ratio
  

Keywords: Periwinkle, diallel analysis, combining ability, correlation coefficient

Info

Year: 2007
Volume: 67
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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