Variation of morpho-agronomical characteristics and genetic diversity of imported asparagus cultivars in Vietnam

Abstract

Asparagus (Asparagus officinalis L.) is a perennial plant globally known for its unique texture, good flavor, and high nutritional value. This paper aims to provide information on the phenotypic traits, the situation of stem blight disease of the imported asparagus varieties and introduce suitable asparagus cultivars for Vietnam. The evaluation of morpho-agronomical characteristics variability of 13 imported asparagus cultivars in the first growing year was arranged in a Random Complete Block Design (RCBD) with 3 replicates in Hanoi, Vietnam. Genetic diversity was assessed using hierarchical clustering on principal component analysis of all measured traits. The results showed that 13 asparagus cultivars were classified into 4 main groups matched with geographical origins based on principal component analysis. Atlas achieved the highest harvested yield (11.4 quintals ha-1) in the first harvesting time, which is correlated with high root CHOs level, followed by UC157, WB231 and Grande varieties. Purple passion had the highest sugar and vitamin C content. However, all varieties were infected with stem blight disease. In general, Atlas could be recommended for asparagus cultivation in Vietnam with high yield and good quality