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60年代,日本、苏联和我国对桑树杂种优势开始进行研究,至今已取得较大的进展。70年代中期,中国农科院蚕研所、广东省蚕研所和顺德县农科所等单位配制了100多个组合,通过田间评比测产,选出了增产幅度较大的中桑5801×育82号(即丰驰桑),沙2×伦100、塘十×伦109、北1×伦104等杂交组合并应用于生产。近几年江苏、浙江、广东、广西、四川、湖北、江西、安徽、山东等省部分蚕区引进和推广了杂交桑,均取得显著效果,促进了我国蚕桑事业的发展。
In the 1960s, Japan, the Soviet Union and China started to study the heterosis of mulberry trees. So far, great progress has been made. The mid 70s, the Chinese Academy of Agricultural Sciences Institute of silkworm, silkworm Institute of Guangdong Province and Shunde County Department of Agricultural Science and other units prepared more than 100 combinations, field test by yield, selected a larger yield increase in the Sang Sang 5801 × Yu 82 (Fung Chi Sang), Sha 2 × Lun 100, Tang Xun Lun 109, North 1 × Lun 104 and other hybrid combinations and applied to the production. In recent years, some silkworms in Jiangsu, Zhejiang, Guangdong, Guangxi, Sichuan, Hubei, Jiangxi, Anhui, Shandong and other provinces introduced and popularized the hybrid mulberry and achieved remarkable results and promoted the development of sericulture in our country.