本文主要报道我所育成的夏秋用推广品种的几点体会。 在亲本选配上,两个对交原种的一方含有一定的多化性血统,另一方为多丝量二化性血统。采用这样的搭配方法,能将茧丝质及强健性这一夏秋蚕品种选育中的矛盾得到比较合理的解决;用多丝量二化性品种作改良种回交的,以2—3次为宜,回交到4次茧质提高有限,生命力下降,龄期经过延长;采用高温多湿的环境条件,对杂种后代进行定向培育,是夏秋蚕品 This article mainly reports on the summer and autumn I have cultivated varieties to promote a few experiences. In the parental matching, the two on the cross-origin of the party contains a certain diversity of blood, the other is a multi-filamentous serotypes. By adopting such a collocation method, the contradiction between the silkworm cocoon thread quality and its robustness in breeding summer summer autumn silkworm varieties can be solved more reasonably; Is appropriate, back to 4 cocoon quality improvement is limited, vitality decreased, the age has been extended; the use of high temperature and humidity of the environmental conditions, targeted breeding of offspring is summer and autumn silkworm