The development of southern highbush varieties allowed for the expansion of production of blueberries towards regions with milder winters, adding new producing countries, and extending international supply schedules. For David Yarborough, professor emeritus of Horticulture at the University of Maine, this has been one of the most significant changes in the recent evolution of the industry.

An emeritus specialist in wild blueberries, Yarborough has dedicated much of his career to studying this crop in Maine. In a conversation with Blueberries Consulting, he addressed the contribution of genetics to the expansion of the crop. blueberry cultivated, the particularities of the wild system and the decisions that accompany varietal renewal.

Genetics opened up new production areas

“The transformation is already underway thanks to genetic improvement,” Yarborough argues.

In their analysis, the new varieties have extended harvest windows, facilitated production in a wider variety of environments, and improved attributes such as flavor and post-harvest life. Within this process, the development of [varieties] stands out in particular. blueberry high south.

“The development of the southern highbush varieties allowed the crop to expand to many more countries,” he says.

These varieties were developed, among other objectives, to respond to conditions with lower chill accumulation than many northern highbush cultivars. This adaptation facilitated the incorporation of new production regions and helped expand the availability of blueberries in the markets.

The performance of each material continues to depend on the climate, management, and conditions of the area where it is planted. Therefore, local evaluation is necessary before moving to a commercial scale.

The unique characteristics of wild blueberries

Production blueberry Cultivated blueberries are grown in established fields with selected varieties. Wild Maine blueberries follow a different logic: they are managed from populations naturally present in the field.

In this system, Yarborough identifies opportunities to expand production by incorporating new managed areas. He also highlights the scientific interest in the composition and bioactive compounds of wild blueberries, characteristics that contribute to their differentiation within the category.

Varietal renewal mainly corresponds to cultivated blueberries, while wild production focuses its efforts on improving the management and efficiency of existing populations.

Wild Maine Blueberries © Wildblueberries.com

Renew based on field performance

On blueberry In cultivation, genetic evolution leads directly to another decision: when to maintain a variety and when to replace it.

Yarborough suggests that the industry should review the continued use of materials that no longer adequately meet the production and quality objectives of each field. This observation applies to both the establishment of new plantations and the renewal of existing areas.

The decision should not depend solely on the age of a variety. Adaptation, yield, fruit quality, post-harvest condition, and commercial response should be evaluated according to the production area and the intended use.

New genetics do not, in and of themselves, guarantee better results. A material may show advantages in one region and present limitations under another climate, soil, or management system. Therefore, local validation remains crucial before replacing varieties that still deliver adequate productive and commercial results.

Genetics, supply and consumption growth

According to Yarborough, industry pioneers would be surprised by "the growth achieved on a global scale, driven by genetic improvement and by the positioning of the blueberry as a fruit associated with health."

Demand growth and supply expansion progressed in parallel. While consumption gained ground in various markets, genetics allowed for extended seasons and the development of fruit with attributes better suited to commercial demands.

The southern highbush shows how far varietal development can expand the productive frontiers of blueberryBut it also confirms that the behavior of a material depends on the area, the handling, and the market it must respond to.

The challenge for the industry will be to combine access to new genetics with local assessments that identify real improvements in productivity, quality, and post-harvest performance. Varietal renewal will only make sense when it responds to concrete results in the field and defined commercial objectives.