テントウムシ Harmonia axyridis PALLAS の遺傳學的研究 第V報

抄録

In this report two rare pattern types: distincta (new name proposed by Prof. T. Komai) (Fig. 1-a, b) and rostrata (new name proposed by Prof. T. Komai) (Fig. 1-c, d) are dealt with. Both of these are due to the factors (P^D=factor for distincta, P^R=factor for rostrata) belonging to the same allelomorphic series as succinea, axyridia, spectabilis, conspicua, forficula, transversifascia, aulica and gutta and behave as dominants to succinea, but the heterozygote of distincta and succinea and the heterozygote of rostrata and succinea often can be distinguished from the respective homozygotes in that the spot has a concavity on the posterior side (Fig. 1-b, d). The concavity, however, is missing in some cases, and the heterozygote may show the same appearance as the homozygote (Fig. 1-a, c).
Distincta is completely dominant to forficula and rostrata. The heterozygote of distincta and axyridis (P^DP^A) resembles the heterozygote of conspicua and axyridis (see Report II, Fig. 1-l, m), but can be distinguished from the latter by the presence of the antero-median spot of axyridia (Fig. 2-c). All of the heterozygotes of conspicua and distincta (P^CP^D), gutta and distincta (P^GP^D), distincta and spectabilis (P^DP^S), distincta and transversifascia (P^DP^T) and distincta and aulica (P^DP^Au) have phenotypes similar to distincta, except that the antero-median spot is entirely missing (Fig. 2-d).
Rostrata is completely dominant to forficula. The heterozygote of rostrata and axyridis (P^RP^A) resembles the heterozygote of spectabilis and axyridis (see Report II, Fig. 1-h, i), but can be distinguished from it in the presence of the antero-median spot of axyradia (Fig. 2-g). The heterozygotes of spectabilis and rostrata (P^SP^R) and rostrata and aulica (P^RP^Au) cannot be distinguished from the heterozygote of spectabilis and forficula (Fig. 2-h). The heterozygotes of conspicua and rostrata (P^CP^R), gutta and rostrata (P^GP^R) and transversifascia and rostrata (P^TP^R) cannot be distinguished from the heterozygote of conspicua and forficula (Fig. 2-i).