Buds of introduced fruit mulberry were irradiated by ion beam.The irradiated buds were grafted,and'Sangzi 2'was selected from the grafmg group.'Sangzi 2'comes into leaf in early March and then blooms.Usually 3-6 fruits come out of every flower bud.The longitudinal diameter of fiuit is 2-4 cm,and the fruit weight is 3-5 g.The fruit matures while it turns purple brown in early May,and lasted for 45 d,with fruit yield of 48 000 kg· hm2.Anthocyanin content in fruits is up to 1.97 g · kg-1.Protein content is 2.26％.Total sugar content is 1.81％,and total acid content is 5.08 g · kg-1.This cultivar has wide adaptability and strong resistance,and is suitable for cultivation in Anhui Province.
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