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Genetics of Indoxacarb resistance in Helicoverpa armigera (Hubner)
Author(s) -
GHODKI Basweshwar S.,
THAKARE Shivcharan M.,
MOHARIL Mangesh P.,
RAO Nagarjuna G. V.
Publication year - 2009
Publication title -
entomological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 20
eISSN - 1748-5967
pISSN - 1738-2297
DOI - 10.1111/j.1748-5967.2008.00195.x
Subject(s) - indoxacarb , helicoverpa armigera , biology , heritability , genetics , microbiology and biotechnology , botany , lepidoptera genitalia , pesticide , agronomy
The present investigation was done with the aim of studying the genetics of Indoxacarb resistance. Selection of Helicoverpa armigera (Hubner) with Indoxacarb was done for eight generations to develop resistance. Reciprocal crosses between resistant and susceptible populations were made to understand the population genetics of Indoxacarb resistance in H. armigera . Generation‐wise selection with Indoxacarb was evaluated for resistance development in H. armigera . The LC 50 of Indoxacarb was 2.81 p.p.m. for the first selected generation, and it increased to 272.55 p.p.m. after eight selected generations, which is a 1238.86‐fold resistance compared to the susceptible strain. The estimated realized heritability (h 2 ) after eight generations of selection with Indoxacarb was 0.45. The number of generations required for a tenfold increase in LC 50 (1/R) was estimated to be 2.59. The response to Indoxacarb selection in H. armigera was 0.39, the estimated selection differential (S) was 0.87, and the phenotypic standard deviation (σp) was 0.03. Reciprocal crosses between Indoxacarb resistant and susceptible strains revealed that the inheritance of Indoxacarb resistance was autosomal: neither maternal effect nor linkage was evident. The values of D LC (0.10 and 0.09) indicated completely recessive inheritance of Indoxacarb resistance.