Utilization of large testing network to estimate annual genetic gain for yield and tolerance of corn to water stress in a breeding program FAO 480 and FAO 550
Published in Scientific Papers. Series A. Agronomy, Vol. LV-2012
Written by Gabriela VALSAN, Ion CIOCAZANU, Valentin MANDACHE, Viorel DINCĂ
Results obtained in a large testing network in 2011 were used to estimate the efficiency of the corn breeding effort in early stage of testing (R1 and R2), by measuring the annual genetic gain for yield and tolerance of corn to water stress in maturities groups of interest for Romania. Linear regression between yield and harvest moisture, as well as between yield averaged over water stressed locations and yield averaged over non-stressed locations were used to estimate annual efficiency of the corn breeding program for FAO maturities 480 and 550. Results showed that the process of selection was efficient in improving yield, drought tolerance in both corn maturities groups (FAO 480 and 550) and all selection stages (R1, R2), producing significant genetic gains, and confirming thus the efficiency of the breeding process on short (annual) term.