Comprehensive Evaluation of Yunnan Potato Landraces: Agronomic, Sensory, and Nutritional Traits

TL;DR

This study evaluates 48 Yunnan potato landraces, finding they have unique traits and better flavor than commercial varieties, making them valuable for breeding.

Contribution

The study provides a comprehensive evaluation of Yunnan potato landraces across agronomic, sensory, and nutritional traits.

Findings

Landraces had unique appearances with deeper eyes and irregular tubers compared to commercial varieties.

Landraces showed greater firmness, richer flavor, and better thermal stability in starch than commercial varieties.

Landraces had similar mineral content to Andean landraces but slightly less than commercial varieties.

Abstract

This study focused on 48 landraces from Yunnan Province, with seven commercially bred varieties as controls. Descriptive analysis and variance analysis were employed to evaluate the landraces across various aspects, including agronomic traits, tuber characteristics, and quality attributes. The results indicated that compared with commercial varieties, landraces exhibited unique appearances with deeper eyes and smaller and irregularly shaped tubers. In terms of texture, landraces had greater firmness and poorer mealiness but possessed a richer potato flavor, resulting in higher overall scores than commercial varieties. The mineral content of landraces was slightly lower than that of commercial varieties but similar to that of Andean landraces. The starch from landraces demonstrated better thermal stability but was more prone to retrogradation. Textural properties showed that landraces had greater hardness, cohesiveness, springiness, and chewiness compared with commercial varieties, indicating a denser texture, poorer mealiness, greater firmness, and consistent results with the sensory evaluation. In summary, landraces represent crucial genetic resources in breeding programs. A comprehensive study of the sensory characteristics, agronomic traits, and mineral content of landraces is essential for effectively utilizing these resources to broaden the genetic base of potato germplasm.

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