ヤママユガ科Samia属の産卵習性

概要

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Oviposition patterns in the silkmoths, Samia cynthia ricini, Samia cynthia pryeri and their reciprocal F_2 hybrids were investigated under a 16L-8D photoperiod at 25±1℃. Female moths of S.c.ricini mated with males of the same subspecies deposited eggs. About 75% of the total number of eggs were laid during the dark phases of days 1 and 2 after copulation. In virgin females, oviposition occurred mainly on days 3 to 8 after emergence. The average number of eggs in each egg mass of S.c.ricini and S.c.pryeri was about 10 and 25,respectively. The number of eggs per egg mass of S.c.ricini was large, and sometimes more than 100 were laid in concentrated large masses (L-type). On the other hand, female S.c.pryeri laid widely-scattered egg masses in small groups of 1 to 10 eggs (S-type). Inter-subspecific reciprocal crossing produced F_1 progenies with differential oviposition patterns. The average number of eggs per egg mass from S.c.ricini (♀)×S.c.pryeri (♂) was about 28. (Each mass was of the S-type.) However, the number from S.c.pryeri (♀)×S.c.ricini (♂) was about 14. (Each mass was of the L-type.) These results suggest that the gene(s) controlling oviposition behavior is located on the sex chromosome.
日本応用動物昆虫学会の論文
1993-08-25