RESULTS ON BREEDING AND SELECTING OF NEW PROMISING STRAWBERRIES FOR HIGHLANDS IN VIETNAM

Abstract

Research on breeding and selecting promising strawberry clones has been carried out at the Potato, Vegetable and Flower Research Center in Da Lat city, Lam Dong province and Bac Ha district, Lao Cai province since 2018. The research materials were imported from Korea, Japan and - local varieties in Vietnam. Applying sexual hybridization method to create hybrid combinations, evaluation and selection hybrid individuals combined with asexual propagation through tissue culture method was used in this study. As a result, 50 hybrid combinations were created through the research with 10.800 seeds. Six promising clones including PS1.07, PS7.01, PS8.07, PS8.10, PS8.14, PS17.04 were selected for trials that applying high technology in the net houses in Da Lat city, Lam Dong province and Bac Ha district, Lao Cai province. They are considered with high yield potential (27.8-32.6 tons/ha/year in Da Lat city and 12.7-13.2 in Bac Ha district), first classified fruit (73.6-82.1%), fruit sweetness (Total soluble solids(⁰Brix):11.0 - 12.6%), good taste, very fragrant and firmness fruit; tolerated to some main diseases such as powdery mildew (Sphaerotheca macularis), Anthracnose (Colletotrichum fragariae) and Angular leaf spot (Xanthomonas fragariae). Among of 6 promising tested clones, PS8.10 demonstrated to be a remarkable promising clone for high yield (32.6 tons/ha/year in Da Lat city and 13.2 tons/ha/year in Bac Ha district) that it was highly accepted by farmers in productions of Lam Dong and Lao Cai provinces.