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一、春用新品种“春四”浙江农科院蚕桑所蚕种研究室,从1970年开始配制育种材料,按照好养、优质、高产的目标,进行5年10代的定向培育而成的日日杂交固定的日系二化性多丝量品种。通过多次实验室杂交组合比较试验,根据各项成绩的综合评定,以春四×苏1号较为优良,该组合的体质强健好养,发育齐,蚕体大而匀,产茧量高,茧丝质优。经农村生产鉴定,生产性能良好。1974年全省8个农村鉴定点平均成绩,春四×苏1号的发育经过、张种产
First, spring with a new variety “Spring IV” Zhejiang Academy of Agricultural Sciences silkworm sericulture research laboratory, starting from 1970 preparation of breeding materials, according to good support, high quality, high yield of the target, 5 years 10 generations of directional cultivation Japanese and Japanese hybrid fixed Japanese multi-filamentous varieties. Through a number of laboratory hybridization combinations of comparative tests, according to the comprehensive evaluation of the results, Chun Si × Su 1 is more excellent, the combination of strong and good physical fitness, development Qi, silkworm body large and uniform, high cocoon production, Cocoon silk excellent quality. Appraised by the rural production, good production performance. In 1974 the province’s eight rural appraisal points, the average score, spring four × Su 1 after the development of Zhang species