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《研菁×日桂》丝质优良、丝量高、强健好养,深受群众欢迎,并经全国桑蚕品种委员会审定通过,农牧渔业部批准可供全国夏秋期试养推广。但《日桂》后期死笼率较高,卵量少,《研菁》对农药残效较敏感。直接影响到蚕种场的经济效益,致使扩大饲养受到一定的影响。为提高繁殖系数,满足生产需要,除继续选育提高《研菁》,《日桂》原种的体质和抗性外,还探索组成双交原种。经多年来测交和原种试繁试养,一代杂种室內外品比表
“Chrysanthemum × Gui Gui” silk excellent, high silk, strong and well-nourished, welcomed by the masses, and approved by the National Commission for silkworm varieties, approved by the Ministry of Agriculture, Animal Husbandry and Fisheries for trial promotion throughout the country during the summer. However, the late caged rate of “Gui Gui” is relatively high with fewer oocytes, while “Jingjing” is more sensitive to pesticide residues. Directly affect the economic efficiency of silkworm farms, resulting in increased rearing affected to some extent. In order to increase the multiplication coefficient and meet the production needs, we should explore the composition of the double cross-breeding seed stocks in addition to continuing breeding to improve the physique and resistance of the original seeds of “Jingjing” and “Gui-Gui”. After many years of test and the original test to test breeding, a generation of hybrid indoor and outdoor products than the table