1991
DOI: 10.2135/cropsci1991.0011183x003100040025x
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Recurrent Selection for Resistance to Exserohilum turcicum in Eight Subtropical Maize Populations

Abstract: There are few reports on the progress achieved through recurrent selection for quantitative resistance to diseases in tropical or subtropical maize (Zea mays L.) populations. The objective of this study was to evaluate the progress achieved after four cycles of full‐sib S1 recurrent selection in eight subtropical populations from the International Maize and Wheat Improvement Center (CIMMYT). Selection was primarily for improving polygenic resistance to the northern corn leaf blight (NCLB) induced by Exserohilu… Show more

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Cited by 43 publications
(38 citation statements)
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“…Under the quantitatively resistance model, recurrent selection would be the most appropriate breeding method for improving tolerance. Indeed, several studies have documented significant gains from recurrent selection for NCLB resistance (Brewbaker et al, 2011;Campaña and Pataky 2005;Carson 2006;Ceballos et al, 1991;Jenkins et al, 1954;Pataky 1994) with 15 to 20% reduction in susceptibility per generation (Campaña and Pataky 2005;Carson 2006;Ceballos et al, 1991).…”
Section: Resultsmentioning
confidence: 99%
“…Under the quantitatively resistance model, recurrent selection would be the most appropriate breeding method for improving tolerance. Indeed, several studies have documented significant gains from recurrent selection for NCLB resistance (Brewbaker et al, 2011;Campaña and Pataky 2005;Carson 2006;Ceballos et al, 1991;Jenkins et al, 1954;Pataky 1994) with 15 to 20% reduction in susceptibility per generation (Campaña and Pataky 2005;Carson 2006;Ceballos et al, 1991).…”
Section: Resultsmentioning
confidence: 99%
“…Plant materials and DNA extractions: In this study we examined Pool 30, which was one of eight maize populations (referred to by CIMMYT as gene pools) improved by full-sib S 1 recurrent selection by Ceballos et al (1991). Each cycle of selection was composed of two generations: (1) in one environment individuals were selected from within families and full-sib mated to individuals selected from other families and (2) in a second environment individuals were selected from within full-sib families (produced in step 1) and selfed to produce S 1 families (Figure 1).…”
Section: Methodsmentioning
confidence: 99%
“…This pattern was consistent with the hypothesis that a large number of loci contribute to NLB resistance. On the other hand, several studies using recurrent selection to increase NLB resistance have documented strong selection responses, with $15-20% reduction in susceptibility per generation (Ceballos et al 1991;Campaña and Pataky 2005;Carson 2006), which has been interpreted as indicative of an oligogenic mode of inheritance (Ceballos et al 1991). We hypothesized that SM could reveal the loci that account for the strong selection response and allow the discovery of superior alleles at these loci.…”
mentioning
confidence: 99%
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“…On-going efforts to breed for resistance in sub-Saharan Africa primarily have been undertaken by national programs, private sector, and international agricultural research centers. Maize breeding programs at the International Institute for Tropical Agriculture (IITA) and the Centro Internacional de Mehoriamento de Mais y Trigo (CIMMYT, the International Center for the Improvement of Maize and Wheat) have resulted in the improvement of numerous populations and inbred lines (Kim et al, 1989;Ceballos et al, 1991). Much progress has been made in the development of genetic resistance for many maize diseases: however, large areas are still planted with farmers' varieties that lack resistance to economic pathogens (Paliwal, 2000;Renfro, 1985).…”
Section: Improving Host Resistancementioning
confidence: 99%