Bombyx mori the molecular identification of the first known pheromone, bombykol, which required extracts from 500,000 individuals, due to the very small quantities of pheromone produced by any individual worm. Currently, research is focusing on genetics of silkworms and the possibility of genetic engineering. Many hundreds of strains are maintained, and over 400 Mendelian mutations have been described. Another source suggests 1,000 inbred domesticated strains are kept worldwide. One useful development for the silk industry is silkworms that can feed on food other than mulberry leaves, including an artificial diet. Research on the genome also raises the possibility of genetically engineering silkworms
Maru Maru Mori Mori! full-length download to cellphones. Sankei Sports reported that "Maru Maru Mori Mori!" crossed the 250 thousand album sales mark as of 17 July 2011. This makes the group the first Japanese group under 10 years old to exceed 200 thousand sales mark in over 35 years, the last person to do so being Kawahashi Hiroshi with his single "Yamaguchi-sanchi no Tsutomu-kun". On 16 August 2011, Oricon reported that this singles managed to remain in the top 10 list for 12 weeks in a row. Amongst singles released by an artist under 10 years old, "Maru Maru Mori Mori!" now holds