Faced with the "sobering experience" of being middle-aged and out of work, Yates saw starting a new firm as the only thing to do.
"Nothing so concentrates the mind like the hangman's noose! My mind was necessarily focused at the time. I needed a new job and income," Yates, now 80, wrote on his website.
Keeping with his family's trade, Yates formed Genetic Technologies in 1986, aiming to build up the Pioneer seed brand in New Zealand.
The company has spent the past two decades growing maize acreage in New Zealand, which Yates said had created new opportunities for the country's maize growers, dairymen and other livestock producers.
Genetic Technologies remains a 100 per cent New Zealand-owned Yates family seed business, with the management team now run by Philip's son, William.
Yates remains chairman of the firm.