Nino Brown works with the University of Georgia as an assistant research scientist with the department of crop and soil science as a peanut breeder. He works closely with Dr. Bill Branch who has been the peanut breeder for over 40 years now. Some of the things that they focus on is increasing yield, increasing dollar value, improving disease resistance, shelling quality, flavor, drought resistance, and a lot of various agronomic traits that are important to growers.
When Brown first started, Dr. Branch and Brown started a trial to look at the genetic gain which is the progress that’s been made over the course of the UGA peanut breeding program. To do that they looked at all the Georgia runner varieties that have been released from the program, starting with Southeastern Runner 5615, which was released in 1947. Then, continuing to look at Dr. Branches runner varieties that he has released since coming here, starting with Georgia Runner on up to Georgia-18RU. This also included the Georgia-06G and Georgia-12Y. One of the things that they learned from the three-year study was that peanut yields have increased over 3,500 pounds per acre since the inception of the peanut breeding program at UGA.
Since Dr. Branch has been breeding peanuts in Georgia, yields have increased almost 2,000 pounds per acre. When they looked at dollar value, dollar values have increased by a little less than 650 dollars per acre and Dr.Branch has been responsible for over 350 dollars per acre increase in dollar value. It was really underscoring the importance and the value of having a public peanut breeding program at the University of Georgia. It is important that they try to maintain that consistent rate of genetic gain that that Dr.Branch has been able to achieve.
To do that, Brown has been looking at ways that we can increase the throughput within the breeding program. They have a lot of really interesting tools at their disposal as plant breeders. Today, they have a lot of high throughput phenotyping devices so there are things, such as drones, that can fly through the field and take really detailed measurements, high speed seed sorting machines, and they are using all these technologies to try to apply them within the peanut breeding program so that they can maintain that high rate of genetic gain.
They have had several years of using drones in their replicated yield trials and they are starting to use them for selection purposes in their nurseries. They are also developing a ground-based phenotyping robot called Watson with collaborators in Athens, Dr. Changying “Charlie” Li and Dr. Rui Xu. They are working with JLA to apply high throughput seed sorting system to the breeding program to sort high oleic exceeds from normal oleic seeds so they can use them in breeding nurseries to sort the high oleic plants more effectively from the normal plants in the nurseries.
Several years ago, the peanut industry had the foresight to sequence the cultivated peanut genome which has made it a lot easier to do things like genetic diversity studies so they can better understand the genetic relatedness of our peanut cultivars. They also had a study a few years ago which looked at all of the peanut varieties that have been released by the university over the course of its 90-year history to better understand how they can make crosses among related or unrelated lines so that they can maintain that constant rate of genetic gain to help improve grower’s bottom line.
They are trying to incorporate high throughput methods and new breeding technologies and new genetic technologies to maintain a high rate of genetic gain for growers in Georgia and beyond.