Spodoptera litura an important insect pest of groundnut
causes yield loss up to 71% in India. Though many effective
chemicals are available to control Spodoptera, host plant
resistance is the most desirable, economic and eco-friendly
strategy. In the present study, groundnut mini core (184),
recombinant inbred lines (318) and elite genotypes (44)
were studied for their reaction to Spodoptera litura under
hot spot location at Dharwad. Heritable component of
variation existed for resistance to Spodoptera in groundnut
mini core, recombinant inbred lines and elite genotypes
indicating scope for selection of Spodoptera resistant
genotypes. Only 29 (15%) genotypes belonging to
hypogaea, fastigiata and hirsuta botanical varieties under
mini core set, 15 transgressive segregants belonging to
fastigiata botanical variety among 318 recombinant inbred
lines and three genotypes belonging to hypogaea and
fastigiata botanical varieties under elite genotypes showed
resistance to Spodoptera litura with less than 10% leaf
damage. Negative correlation existed between resistance
to Spodoptera and days to 50 per cent flowering indicating
late maturing nature of resistant genotypes. Eight resistant
genotypes (ICG 862, ICG 928, ICG 76, ICG 2777, ICG 5016,
ICG 12276, ICG 4412 and ICG 9905) under hypogaea
botanical variety also had significantly higher pod yield.
These diverse genotypes could serve as potential donors
for incorporation of Spodoptera resistance in groundnut.
Correlation study of traits associated with shoot fly resistance in recombinant inbred lines (RILs) population of sorghum [Sorghum bicolor (L.) Moench]
