Indian Society of Genetics & Plant Breeding

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

Published on

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

Info

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

Authors

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

Download PDF