家蚕新品种泰·丰、晓·晖的育成

BREEDING OF A NEW SILKWORM VARIETY TAI· FENG ×XIAO· HUI

采用杂交育种的方法，在春、夏、秋不同环境条件下，经严格的后代选择，育成抗逆性强．老熟、眠起齐一的中系蚕品种泰、丰和日系蚕品种晚、晖，其组配成四元杂交种菜·丰×晓·晖，经过多次实验室和农村生产鉴定表明，该四元杂交种产茧量比对照种菁松×皓月提高6％，产值提高6％～9％，茧丝长1400m，解舒率77％，净度95分，同时具有制种容易的特点，是一个优良的蚕品种。

Two Chinese silkworm strains Tai and Feng and two Japanese silkworm stralns Xiao and Hui were bred through hybridization and selection in different seasons. All of them have high resistance and are uniform in hatching, molting, exuviating and mataring. Based on the theory of heterotic vigor, a new silkworm variety Taifeng × Xiaohui was prepared. Compared to the control variety Jingsong × Haoyue, the new variety has a 6% increase in cocoon output, a 6% ~ 9% increase in production value, 1400 metres in silk length of one cocoon, 77% of reelabitity, 95 marks of neatness. Additionally, it is easier to produce eggs of this variety. Therefore, it is a preferable silkworm variety.