Environment and genotype-environment interaction in maize breeding in Paraná, Brazil

Experimental strategies in performing value for cultivation and use experiments for the tobacco crop II: dimension of the experimental network

“…The sum of squares of the line by site interaction was 2.1 times greater than the sum of squares of lines, showing the importance of the interaction in the tobacco crop for that region. The occurrence of this interaction has frequently been reported in other crops in the same region (Terasawa Jr. et al, 2008;Bertoldo et al 2009;Pereira et al 2009). The first proof of the existence of the interaction may be observed as the source of variation among lines within each site.…”

“…Because of this interaction, the lines behave differently in the different sites. This is a known fact for most crops (Pacheco et al, 2003;Terasawa Jr. et al, 2008;Bertoldo et al, 2009;Pereira et al, 2009). The tobacco crop is no different.…”

“…If an excessive number of sites is used, the efficiency of the breeding program will diminish because the cost of each trial is normally high. With other crops grown in Brazil, numerous studies expressed a view toward ecological zoning (Pacheco et al, 2003;Terasawa Jr. et al, 2008;Bertoldo et al, 2009;Pereira et al, 2009). These studies, however, have a different focus from that presented here.…”

Environment effects for earliness and grain yield traits in F1 diallel populations of maize (Zea mays L.)

“…Maize F1 hybrids and their parental inbred lines and check genotypes revealed significant differences for grain yield at different locations. Other studies also authenticated that significant differences were observed among maize genotype, environment and GEI for grain yield . For maize grain yield, environment, genotype and GEI made a significant contribution to the total variation in yield .…”

“…Other studies also authenticated that significant differences were observed among maize genotype, environment and GEI for grain yield. 15,34 For maize grain yield, environment, genotype and GEI made a significant contribution to the total variation in yield. 21 On average, F 1 hybrid FRHW-1 × SWAJK-1 and check genotype P30K08 were noted with high yield.…”