"We are absolutely delighted for Warren and Joy and the role Bayer played in the generation of this record-breaking yield," said Dr Holger Detje, Bayer New Zealand managing director and head of CropScience.
"There are many factors that determine the success of a great harvest like this - soil, climate, technologically advanced farming machinery as well as farm inputs like the seed variety, nutrients and crop protection solutions," Dr Detje added.
"Applying all of these factors with skilled farmers like Warren and Joy means we can produce a staggering amount of food.Most of the world's barley crop was used for animal feed, Bayer said.
The Darling's crop would feed dairy cattle.
Bayer said globally, barley's main use in human consumption was for beer.
The crop was also used in bread, sweets and porridge.
"This just goes to show how New Zealand farmers are among the best in the world and people like Warren and Joy will help ensure healthy and sufficient food supplies will be available for everyone," Dr Detje said.
A spokeswoman for Bayer said the Darlings notified Guinness of their bumper crop in January and Guinness confirmed the world record this week.