(041011 revised, 041011 created)
Janz N (1998)
Sex-linked inheritance of host-plant secialization in a polyphagous butterfly.
Proc. R. Soc. Lond. B (1998) 26; 1675-1678.
I investigated the genetic background of intraspecific variation in oviposition specificity in the generalist butterfly Polygonia c-album. Using reciprocal crosses between two populations that differ in their degree of specialization, I show that specificity is strongly sex-linked. This indicates that genes determining this difference are located primarily on the paternally inherited X-chromosome. The results suggest that intraspecific differences in specificity are caused by the same genetic mechanisms that have been shown to determine interspecific differences in host-plant ranking in other betterflies. Accordingly, the common assumpution that secialization and ranking are determined by fundamentally different mechanisms was not supported.
Polygonia c-album English: Comma Butterfly . Japanese : si-tateha, シータテハ。 年２回発生。第１化は７月中旬ー８月中旬。第２化は９月上旬からみられる。越冬した個体は４月上旬（もっともはやい記録は４月３日）から活動をはじめる。 秋の最も遅い記録は１０月２３日。それ以後は越冬するものと思われる。
生息環境は山地の林道や渓流沿い、小さな空き地など。 【食樹】ハルニレ、オヒョウ。