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Resistance in hybrid derivatives of Lycopersicon accessions against leaf caterpillar, Spodoptera litura Fab.
Author(s) -
Muthukumaran N.,
Selvanarayanan V.
Publication year - 2008
Publication title -
insect science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 45
eISSN - 1744-7917
pISSN - 1672-9609
DOI - 10.1111/j.1744-7917.2008.00194.x
Subject(s) - spodoptera litura , biology , caterpillar , hybrid , antibiosis , horticulture , sugar , population , lycopersicon , trichome , infestation , larva , botany , veterinary medicine , food science , medicine , genetics , demography , sociology , bacteria
Four tomato accessions, namely Ac 238, Roma, Seijima Jeisei and Varushanadu Local selected from preliminary screening of 321 accessions and their hybrid derivatives, namely HY 1 F 1 (Varushanadu Local × Ac 238), HY 2 F 1 (Varushanadu Local × Roma), HY 3 F 1 (Ac 238 × Roma) (first generation), HY 1 F 2 , HY 2 F 2 and HY 3 F 2 (second generation) were evaluated for their resistance in comparison with a susceptible check, 1979 against the leaf caterpillar, Spodoptera litura Fab. both under field and laboratory conditions at Annamalainagar, Tamil Nadu, India. In the field evaluation, accession Seijima Jeisei and hybrid HY3F1 recorded the minimum larval population. In glasshouse and laboratory studies, Seijima Jeisei was the least preferred by S. litura for both feeding and oviposition. The hybrid HY 3 F 1 exerted pronounced antibiosis effect on S. litura. Among the various biophysical and biochemical bases of resistance, contents of reducing sugar and phenol were found negatively correlated with S. litura larval feeding. Among the hybrids, HY 3 F 1 and HY3F2 and the parent Seijima Jeisei recorded higher fruit yield per plant in both seasons. Considerable variation in the resistance traits of the hybrids was observed when compared with the parents.