Neotropical Entomology (2001) 30, 311-316

Gabriela I. Diez-Rodríguez and Celso Omoto (2001)
Herança da Resistência de Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) a Lambda-Cialotrina
[Inheritance of lambda-cyhalothrin resistance in Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)]
Neotropical Entomology 30 (2), 311-316
Abstract: Inheritance of lambda-cyhalothrin resistance in Spodoptera frugiperda (J.E. Smith) was investigated in a strain of S. frugiperda showing an intensity of resistance of approximately 13-fold. Results from reciprocal crosses between susceptible (S) and resistant (R) strains of S. frugiperda to lambda-cyhalothrin revealed that resistance was autossomal and conferred by an incompletely recessive gene. Then, backcrosses of F₁ progenies to the R strain were performed to determine the number of genes involved in the resistance. From interpretation of chi-square analysis of responses of progenies from backcrosses suggested that the resistance was conferred by a single major gene under a influence of some minor genes.

A herança da resistência de Spodoptera frugiperda (J.E. Smith) ao piretróide lambda-cialotrina foi determinada para uma linhagem de S. frugiperda apresentando uma intensidade de resistência de aproximadamente 13 vezes. Resultados dos cruzamentos recíprocos entre as linhagens suscetível (S) e resistente (R) de S. frugiperda à lambda-cialotrina revelaram que a resistência era de caráter autossomal e incompletamente recessivo. Posteriormente, foram conduzidos retrocruzamentos da progênie F₁ (heterozigota) com o parental resistente para determinar o números de genes envolvidos na resistência. Mediante análise do teste do qui-quadrado das respostas das progênies dos retrocruzamentos à lambda-cialotrina sugere-se que a resistência seja determinada por um gene principal sob a influência de genes secundários.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Database assignments for author(s): Celso Omoto

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Spodoptera frugiperda		Brazil (south)