NC State receives grant to improve African sweet potatoes

NC State University’s College of Agriculture and Life Sciences will receive $12.4 million over the next four years from the Bill & Melinda Gates Foundation to improve a crop that is an important food staple in sub-Saharan Africa – the sweet potato.

The grant, announced in September, will fund work to develop modern genomic, genetic and bioinformatics tools to improve the crop’s ability to resist diseases and insects and tolerate drought and heat. Sweet potatoes are an important food security and cash crop with potential to alleviate hunger, vitamin A deficiency and poverty in sub-Saharan Africa. More than 13.5 million metric tons are produced in sub-Saharan Africa annually; they are predominantly grown in small plot holdings by poor women farmers.

A priority crop for the Gates Foundation’s Agricultural Development Program, the sweet potato has a complex genetic blueprint. Lack of knowledge about the crop’s complex genome and lack of modern breeding tools for the crop currently hamper efforts to expand production.

Dr. Craig Yencho, a CALS professor of horticultural science who heads the university’s sweet potato breeding program, is the project director. He says that sweet potatoes have a number of valuable characteristics that make them an attractive African crop.

“Sweet potato is a hardy crop that can be planted in drought-prone and low-fertility soils,” Yencho said. “Orange-fleshed sweet potatoes, which are an excellent source of vitamin A, rank first in nutritional quality among root and tuber crops grown in sub-Saharan Africa, providing vitamins for millions of people.”

He adds that – besides the crop improvement work – it’s important to build a network of young scientists who can use the new breeding tools and techniques built in this golden era of genomics.

“NC State has a long history of commitment to developing Africa’s sweet potato breeding programs,” Yencho said. “We will work very closely with the sweet potato breeding community to identify young breeders for advanced training to build long-term capacity in use of genomic breeding. During the project term, we will make efforts in training to ensure that new researchers and partners are fully capable of employing newly developed tools.”

Chancellor Randy Woodson praised Yencho’s work on sweet potatoes in Africa and in North Carolina, which leads the United States in sweet potato production.

“Dr. Yencho’s work on this important crop has led to a number of new varieties and improvements in sweet potatoes grown across the world and is an excellent example of NC State’s think-and-do mentality,” Woodson said. “The international collaboration he’ll head will use interdisciplinary teams to gain critical knowledge – and share that knowledge – to help feed a continent.”

Woodson added that the $12.4 million grant is the latest example of continually increasing private support for NC State as the university prepares to launch the most ambitious fundraising campaign in its history. “This type of generous support enables NC State to extend the impact of our life-changing work across the nation and throughout the world,” he said.

NC State co-primary investigators include Dr. Fred Wright, professor of statistics and director of the Bioinformatics Research Center; Dr. Zhao-Bang Zeng, William Neal Reynolds Professor of Statistics and Biological Sciences; Dr. Dahlia Nielsen, associate professor of biological sciences; Dr. Jennifer Schaff, director of NC State’s Genomics Research Laboratory; and Dr. Lina Quesada-Ocampo, assistant professor and Extension specialist in plant pathology.

Partners on the grant include the International Potato Center; Michigan State University; the Boyce Thompson Institute at Cornell University; the University of Queensland; the National Crops Resources Research Institute in Uganda; and the Council for Scientific and Industrial Research in Ghana.

– Mick Kulikowski