エゾエンマコオロギの光周性と地理的変異

概要

論文の詳細を見る
Northern and southern strains of Teleogryllus yezoemma (Ohmachi et Matsuura) were reared in short (11 hours per day) or long (16 hours) photoperiods at a temperature of 26-27℃ and their responses were observed. As a result, both the phenotypic and genotypic variations were found in the duration of nymphal growth as well as in the adult body-size. At each photoperiod, the northern strains grew faster and produced smaller-sized adults than the southern strains. Every local strain grew faster in the short than in the long photoperiod, and the difference in growth rate between the two photoperiodic series was greater in the southern than in the northern strains. These variations in the duration of nymphal stage was not due to the occurrence of any sort of nymphal diapause. The longer period of growth in the long-day regime was accompanied by the increased size of adults, which means that the growth was continuous under such conditions. Photoperiod exerted its effect on the body conformation, and the length of tegmina in both sexes and the length of ovipositor in the female tended to be longer in relation to the general body size in the long photoperiod than in the short. The ecological or adaptational significance of this photoperiodic response and the geographic variation in nymphal development is discussed.
日本昆虫学会の論文
1966-12-15