Indian Society of Genetics & Plant Breeding

Inheritance of rust resistance in cultivated groundnut (Arachis hypogaea L.)

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The present investigation was carried out to study the mode
of inheritance of rust (Puccinia arachidis Speg.) resistance
in groundnut (Arachis hypogaea L.). Crosses were made
between a susceptible (GPBD-5) and three resistant
genotypes (GPBD-4,ICGV86699 and ICGV99005).
Susceptibility to rust of F1’s in all the three crosses indicated
that susceptibility was dominant over resistance. Resistant
F2 plants were further crossed to GPBD-5. The second cycle
F2 populations segregated into susceptible and resistant
categories. The observed frequency of plants in each F2
fitted well into expected ratio of 1 resistant and 3 susceptible
with non-significant chi-square values at 5% level indicating
that rust resistance in groundnut is determined by a single
recessive gene. The F2 results were confirmed by genetic
analysis in F3 generation.

Keywords: Groundnut, rust resistance, inheritance, second cycle F2


Year: 2013
Volume: 73
Issue: 4
Article DOI: 10.5958/j.0975-6906.73.4.069
Print ISSN: 0019-5200
Online ISSN: 0975-6906


M. V. C. Gowda info_circle
R. S. Bhat info_circle

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