Welcker, C.

Response to selection for resistance to leaf feeding by fall armyworm in PopG, a Guadeloupe maize population - Mexico, DF (Mexico) CIMMYT : 1997 - Printed

Fall armyworm, (FAW) Spodoptera frugiperda (J.E. Smith) is a serious insect pest on maize, Zea mays L., in the Central American tropical lowlands and the Caribbean. Development of populations of maize with effective levels of resistance to damage by FAW larvae appears essential for sustainable maize farming. In the Guadeloupe Archipelago, recurrent SI selection for resistance to leaf feeding by FAW larvae was conducted with a local maize composite, PopG. Genetic variability, heritability and predicted genetic gain were estimated from Sl progeny performance tests, and response to selection following three selection cycles was evaluated. Genetic progress was determined from a multilocal, replicated evaluation of populations per se, which were generated by recombinations from each selection cycle. Heritability estimates reached 0.22for C1 and C2 cycles, whereas S1s and predicted genetic gains were 0.10 and 0.35 respectively. The regression of leaf damage ratings on selection cycles gave a significant b value of -0.16 units per cycle of selection. Advanced cycle PopG should be a good source of resistance with intermediate level to leaf feeding by FAW larvae.


English

968-6923-79-9


Central America
Genetic inheritance
Genetic variation
Leaf eating insects
Pest insects
Recurrent selection
Spodoptera frugiperda
Zea mays

CIMMYT

633.153 / MIH
baner

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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.
Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org