細胞学的に考察した Leptidea morsei Fenton と Leptidea amurensis Menetries の関係
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概要
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In the present paper, the author wishes to present some cytotaxonomical evidence in the following two Japanese species of the family Pieridae, Leptidea morsei morsei, and Leptidea amurensis. The numerical and the morphological differences of chromosomes were observed between these two species Figs. 1-6. Until quite recently, Leptidea morsei morsei was treated as a subspecies of Leptidea sinapis by the name, Leptidea sinapis morsei. Cytotaxonomical investigation by Lorkovic ('41, '50) with European species made clear that the butterflies named L. sinapis include the following two different species, L. sinapis and L. morsei major. Cytologically, L. sinapis shows an individual variation of the chromosome number which ranges from 28 to 41 in haploid. Further noticeable evidence is that some chromosomes of the complex assume a V-or cylinder shape. L. morsei major is characterized by n, 54 dot-like chromosomes. Leptidea morsei morsei (or L. sinapis morsei) was found to possess 54 dot-like chromosomes in haploid. They are isomorphic in complex being consisted of dot-like elements of nearly similar size (Figs. 3, 6). The author's findings on L. morsei from Japan are in complete agreement with those reported in L. morsei major by Lorkovic ('50), and further point out that the chromosomes of the Japaneses species named L. morsei (or L. sinapis morsei) differs greatly from those of the European species, L, sinapis, in number of chronosomes as well as in other morphological respects. Cytological evidence here presented is in favor of, or supports, the view of Lorkovic ('50) based on the morphological study. Leptidea amurensis is characterized by the chromosomes with a somewhat angular outline. In this respect the present species is rather exceptional in the Rhopalocera, since the great majority of lepidopteran species possess the chromosomes of a round or oval shape. Further, this species is also particular in respect of the chromosome number, since it shows the haploid number of 61. It is also remarkable that there are two "Sammelchromosomen" in the haploid complex (Figs. 1, 2, 4, 5). All the cytological features as mentioned above indicate with certainty that L. amurensis is a species distinctly different from L. sinapis as well as from L. morsei.
- 社団法人日本動物学会の論文
- 1958-12-15
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