Bombyx mori breeding. Silkworm breeding is aimed at the overall improvement of silkworm from a commercial point of view. The major objectives are improving fecundity (the egg-laying capacity of a breed), the health of larvae, quantity of cocoon and silk production, and disease resistance. Healthy larvae lead to a healthy cocoon crop. Health is dependent on factors such as better pupation rate, fewer dead larvae in the mountage, shorter larval duration (shorter larval duration lessens the chance of infection) and bluish-tinged fifth-instar larvae (which are healthier than the reddish-brown ones). Quantity of cocoon and silk produced are directly related to the pupation
Maru Maru Mori Mori! the record of the longest streak on the Oricon charts. The previous record set by the 2007 song "Gake no Ue no Ponyo", the theme song of the Studio Ghibli film "Ponyo", which remained on the charts for 11 consecutive weeks in 2008. "Gake no Ue no Ponyo" featured the then 8-year old actress Nozomi Ōhashi. The song "Maru Maru Mori Mori" received the Special Award at the 53rd Japan Record Awards. Maru Maru Mori Mori! On 4 April 2011, it was announced that the theme song of the Fuji Television television drama "Marumo no Okite" will be sung by