Varietal response to soybean target spot (Corynespora cassiicola) in the Brazilian Neotropical Savannah

Need for disease resistance breeding against Corynespora cassiicola in crops

“…Table 1 presents a summary of the current status of breeding efforts in different crops. Although C. cassiicola plant diseases have been reported since the 1960s (Ramakrishnan and Pillay, 1961;Blazquez, 1967), breeding for resistance to C. cassiicola diseases has not been a primary focus (Pernezny and Simone, 1999;Edwards Molina et al, 2022), and disease management has relied on the use of fungicide sprays (Chee, 1990;MacKenzie et al, 2018;de Castro Costa et al, 2023). Disease resistance has been identified in tomato, rubber tree, soybean and cucumber (Bliss et al, 1973;Narayanan and Mydin, 2012;Wen et al, 2015;de Castro Costa et al, 2023).…”

“…Although C. cassiicola plant diseases have been reported since the 1960s (Ramakrishnan and Pillay, 1961;Blazquez, 1967), breeding for resistance to C. cassiicola diseases has not been a primary focus (Pernezny and Simone, 1999;Edwards Molina et al, 2022), and disease management has relied on the use of fungicide sprays (Chee, 1990;MacKenzie et al, 2018;de Castro Costa et al, 2023). Disease resistance has been identified in tomato, rubber tree, soybean and cucumber (Bliss et al, 1973;Narayanan and Mydin, 2012;Wen et al, 2015;de Castro Costa et al, 2023). Bliss et al (1973) In rubber tree, studies have identified resistant clones but with inconsistent results across studies or even between different experiment settings within the same experiment (i.e., greenhouse and field) (Chee, 1988;Narayanan and Mydin, 2012).…”

“…Resistant soybean cultivars released in the 1950s were associated with negative agronomic traits, and only susceptible soybean cultivars were thereafter used (Edwards Molina et al, 2022). More recently, some soybean varieties have shown resistance or moderate resistance in greenhouse (Patel et al, 2022) or field settings (de Castro Costa et al, 2023). Genetic analysis based on greenhouse inoculations suggested that soybean resistance is quantitative, involving both additive and epistatic effects, and is largely influenced by the environment (Soares and Arias, 2020).…”