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향류분배장치에 의한 초파리의 행동에 관한 유전학적 연구 : 1. 인위도태 및 잡종분석 1. Artificial Selection and Hybridization Analysis
추종길,김유창 한국유전학회 1982 Genes & Genomics Vol.4 No.2
향류분배장치를 사용하여 초파리의 주광성행동에 관한 positive와 negative 방향으로의 인위도태를 16세대에 걸쳐 행하였다. 최초집단의 주광성지수는 중립을 나타내었고, 도태의 효과는 초기세대에서부터 높게 나타나 약 5세대 이후부터 양 형질이 각각 selection plateau에 달하였다. 10세대까지의 realized heritability를 계산한 결과 positive주광성은 약 3∼9%의 범위였으며, negative주광성은 약 6∼18%의 범위로 나타나 후자의 유전율이 높게 나타났다. For the study of positive and negative phototaxis, directional selections were made with the flies from natural populations of Drosophila melanogaster, using the countercurrent distribution apparatus. The phototaxis of the initial samples was neutral and the effects of selection were clearly recognizable in the initial generations, the phototaxis reaching a selection plateau from the 5th generation onwards. The "realized heritability" of positive and negative phototaxis for the first 10 generations was 3-9% and 6-18% respectively, the latter showing much higher heritability. The crossings of the selected pairs of the 5th, 10th and 15th generations of the samples show that the phototactic scores of the hybrids deviate significantly from the midparent value in the direction of positive phototaxis. The results suggest that the positive-phototaxis-determining genes were partially dominant over those manifesting negative behavior.
초파리의 P - M System 역교배에 의한 P 전이인자의 유전적 변화
추종길,송선주 한국유전학회 1997 Genes & Genomics Vol.19 No.2
In an attempt to the effect of continuous backcrossing to M flies on the P element activity of males in Drosophila melanogaster, P flies and their offspring were backcrossed with M flies. Two components of dysgenesis, P element activity and P element DNA amount, were examined during the six generations. From the result of experiments where P flies were backcrossed to M flies, the ability of males to induce gonadal dysgenesis decreased rapidly until the 6th generation where it was below 5% in the dysgenic crosses and the similar results was detedcted in the nondysgenic crosses. The amount of P elements DNA was measured by Southern analysis using biotin-labeled pπ25.1 probe. The total amount of autonomous P element DNA were decreased gradually. It was suggested that the ability of flies to either induce or suppress gonadal sterility in different generations seems closely correlated with the amount of P element DNA. These results seem to support the stochastic loss hypothesis of P element in the natural populations of Drosophila.
추종길,최은희 한국곤충학회 1983 Korean journal of entomology Vol.13 No.1
Field crickets were collected from 1980 to 1981 at five localities of Korea and classified into spccies of the family Gryllidae. Five genera and 11 species including 5841 specimens were recorded. Ceographic variation of the adult size(head width and body length) increases from north (Gangneung city) to southward(Jeju Island) in Teleogryllus emma. Mean developmental day of eggs collected from five localities was positively correlated with the original latitudr. The time from egg to nymphal emergence was 89.6 days at southern latitude of Jeiu Island, while it averaged was about 62 days at northern latitude of Seoul, Donghae and Gangneung. The nymphal emergence time of eggs in the species of T. emma was controlled by photo-period. In odor to elucidate the correlation between photoperiodic response and developmental time, the eggs laid on rotten wool plug were stored in refrigerator at 6$^{\circ}C$, and the eggs were transferred to 26$^{\circ}C$ after 20 days. Photoperiodic tests were carried out in five separate series. The eggs emerged in about 32 days at 16L : 8D, l4L : 10D and 12L : 12D. On the other hand, the eggs reared at the constant light(24LL) and constant dark(24DD) environments emerged in 45 and 55 days. 국내의 제주도, 지리산, 서울, 동해 및 강을 등 5개지역을 대상으로 1980년부터 2년간에 걸쳐 귀뚜라미를 채집한 결과 5속 11종, 총5,841개체를 기록하였다. Teleogryllus emma 에 대하여 체장 및 두폭의 지리적 변이를 조사한 결과 위도가 높을수록 체장 및 두폭이 작아지는 경향을 보였다. 국내 5개 지역에서 채집한 T. emma 에 대하여 지역간 평균부화일수를 조사하였다. 위도가 제일 낯은 제주도(33$^{\circ}$N)가 89.6일이었고, 북쪽으로 약 5$^{\circ}$N 위에 위치한 동해, 서울 및 강릉지역은 평균 약 62일로 나타나 위도차에 따라 30일 가량의 주화시차를 보였다. T. emma 의 알을 20일간 6$^{\circ}C$에서 저온처리한 다음 26$^{\circ}C$의 고온에 옮겨 광주기를 달리하여 평균부화 일수를 조사하였다. 실험결과 16L, 14L 및 12L의 광주기하에서는 각각 27.64일, 32.50일 및 35.50일이 소요되었고, 부화율도 각각 약 70~80%로 나타났다. 그러나 24LL와 24DD 에서는 각각 44.25 일과 54.65 일이었으며, 부화율도 52.6%, 61.7%에 지나지 않았다. 또한 부화된 약충의 발육도 극히 미진하였다.