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Introducing unadapted, insect-resistant maize germplasm in three-way hybrid combinations for resistance to the maize stalk borer, Busseola fusca (Fuller) (Lepidoptera: Noctuidae)

By: Van Rensburg, J.B.J | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico).
Contributor(s): Mihm, J.A [ed.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 1997ISBN: 968-6923-79-9.Subject(s): Breeding methods | Chemical control | Germplasm | Infestation | Pest insects | Pest resistance | CIMMYT | Zea mays AGROVOC | Hybrids AGROVOCDDC classification: 633.153 Summary: The potential value of various levels of resistance to the maize stalk borer was evaluated by crossing three unadapted, resistant inbreds and three local elite inbreds in various combinations. The unadapted, resistant germplasm could be employed directly to introduce resistance, provided that undesirable traits inherent to the unadaped parents were sufficiently diminished by the genetic contribution of the adapted germplasm. The use of a single resistant parent in a three-way hybrid to increase the resistance level to 25% was sufficient to eliminate the need for chemical control at moderate levels of infestation. The use of two resistant parents to obtain a level of 50% resistance in the resultant three-way cross posed an unacceptable risk, due to an increased incidence of ear rot and lodging.Collection: CIMMYT Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 633.153 MIH (Browse shelf) 1 Available 1P623915
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The potential value of various levels of resistance to the maize stalk borer was evaluated by crossing three unadapted, resistant inbreds and three local elite inbreds in various combinations. The unadapted, resistant germplasm could be employed directly to introduce resistance, provided that undesirable traits inherent to the unadaped parents were sufficiently diminished by the genetic contribution of the adapted germplasm. The use of a single resistant parent in a three-way hybrid to increase the resistance level to 25% was sufficient to eliminate the need for chemical control at moderate levels of infestation. The use of two resistant parents to obtain a level of 50% resistance in the resultant three-way cross posed an unacceptable risk, due to an increased incidence of ear rot and lodging.

English

9711|AGRIS 9702

Jose Juan Caballero

CIMMYT Publications Collection

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Lunes –Viernes 9:00 am. 17:00 pm. Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org