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Variability for maysin content in maize germplasm developed for insect resistance

By: Welcker, C | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico).
Contributor(s): Clavel, D [coaut.] | Febvay, G [coaut.] | Mihm, J.A [ed.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 1997ISBN: 968-6923-79-9.Subject(s): Breeding methods | Germplasm | Helicoverpa zea | Pest resistance | Resistance to injurious factors | Spodoptera frugiperda | Varieties | CIMMYT | Zea mays AGROVOCDDC classification: 633.153 Summary: First described in the Mexican maize landrace Zapalote chico, the flavone maysin has been identified as a potent factor in antibiosis to corn earworm Helicoverpa zea (Boddie). This study was conducted to determine maysin content in 20 inbreds and populations of maize which were being developed for resistance to insects. This genetic material and checks were evaluated in the field for corn earworm injury and leaf feeding damage by larvae of fall armyworm, Spodoptera frugiperda (J.E. Smith). Maysin levels in silks and young leaves were measured using HPLC. Maysin levels in silks ranged from 0 to 4 mg/g of fresh weight. The main part of the studied material contained maysin below 1.5 mg/g, the concentration considered to be necessary for resistance based on larval toxicity. Several populations reach the resistance level of Zapalote chico, but a few other populations also possess minor levels of the substance. Among other things, maysin level can be used as a selection criterion to increase the diversity of resistance mechanisms in source germplasm.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 H623915
Total holds: 0

First described in the Mexican maize landrace Zapalote chico, the flavone maysin has been identified as a potent factor in antibiosis to corn earworm Helicoverpa zea (Boddie). This study was conducted to determine maysin content in 20 inbreds and populations of maize which were being developed for resistance to insects. This genetic material and checks were evaluated in the field for corn earworm injury and leaf feeding damage by larvae of fall armyworm, Spodoptera frugiperda (J.E. Smith). Maysin levels in silks and young leaves were measured using HPLC. Maysin levels in silks ranged from 0 to 4 mg/g of fresh weight. The main part of the studied material contained maysin below 1.5 mg/g, the concentration considered to be necessary for resistance based on larval toxicity. Several populations reach the resistance level of Zapalote chico, but a few other populations also possess minor levels of the substance. Among other things, maysin level can be used as a selection criterion to increase the diversity of resistance mechanisms in source germplasm.

English

9711|AGRIS 9702

Jose Juan Caballero

CIMMYT Publications Collection

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Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) © Copyright 2015. Carretera México-Veracruz. Km. 45, El Batán, Texcoco, México, C.P. 56237.
Lunes –Viernes 9:00 am. 17:00 pm. Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org