Knowledge Center Catalog

Maize germplasm with resistance to southwestern corn borer and fall armyworm

By: Contributor(s): Material type: TextTextPublication details: Mexico, DF (Mexico) CIMMYT : 1997ISBN:
  • 968-6923-79-9
Subject(s): DDC classification:
  • 633.153 MIH
Summary: Leaf feeding by the Southwestern corn borer (SWCB), Diatraea grandiosella Dyar, and the fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith), can result in substantial reductions in grain yield of maize, Zea mays L. Development and deployment of varieties and hybrids with resistance to these pests can greatly reduce these losses. Scientists working in Mississippi have developed and released nine maize germplasm lines and one population as sources of leaf feeding resistance to these pests. These lines were derived primarily from Antigua Gpo. 2 germplasm originally obtained from the International Maize and Wheat Improvement Center (CIMMYT). In developing the earlier released lines, selection was based entirely on visual ratings of leaf feeding damage; however, larval growth was also considered in the development and release of the newer lines. analyses of diallel crosses among resistant and susceptible lines indicated that general combining ability was the primary source of variation in the inheritance of resistance to fall armyworm and southwestern corn borer whether resistance was measured as either reduced leaf feeding or reduced larval growth. In 1992, in cooperation with the United States Department of Agriculture, and Agricultural Research Service (USDA-ARS) scientists at Tifton, Georgia, GT-FAWCC(C5) maize germplasm population was released. This population was developed five cycles of S1 progeny selection for resistance to leaf feeding by fall armyworm.
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Leaf feeding by the Southwestern corn borer (SWCB), Diatraea grandiosella Dyar, and the fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith), can result in substantial reductions in grain yield of maize, Zea mays L. Development and deployment of varieties and hybrids with resistance to these pests can greatly reduce these losses. Scientists working in Mississippi have developed and released nine maize germplasm lines and one population as sources of leaf feeding resistance to these pests. These lines were derived primarily from Antigua Gpo. 2 germplasm originally obtained from the International Maize and Wheat Improvement Center (CIMMYT). In developing the earlier released lines, selection was based entirely on visual ratings of leaf feeding damage; however, larval growth was also considered in the development and release of the newer lines. analyses of diallel crosses among resistant and susceptible lines indicated that general combining ability was the primary source of variation in the inheritance of resistance to fall armyworm and southwestern corn borer whether resistance was measured as either reduced leaf feeding or reduced larval growth. In 1992, in cooperation with the United States Department of Agriculture, and Agricultural Research Service (USDA-ARS) scientists at Tifton, Georgia, GT-FAWCC(C5) maize germplasm population was released. This population was developed five cycles of S1 progeny selection for resistance to leaf feeding by fall armyworm.

English

9711|AGRIS 9702

Jose Juan Caballero

CIMMYT Publications Collection


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