Duration of the grain filling period in wheat

Abstract

Assuming positive correlation between the grain filling period duration and yield this character was studied for 38 Brazilian wheat cultivare. Results demonstrate a great variation in the gram filling period duration that was shorter in late than hi earlier cultivars. The following earlier and semi-late cultivare had the longest grain filling period: SB 7519, CEP 7596, IAS 58, Jacui, PF 75171, CNT 9, PEL 72393, Frontana, PAT 7392, IAS 54, Coxilha, Cotiporã, Nobre CNT 8 and PEL 72390. None of the tested late cultivars has shown a long period from heading to harvest.