RAPD와 SSR 마커를 이용한 사과 품종의 유전적 다양성 분석
Analysis of Genetic Diversity of Apple Cultivars Using RAPD and SSR Markers
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본 연구는 사과 품종의 유전적 다양성을 분석하여 육종의기초 자료로 활용하기 위하여 최근에 국내에서 육성된 품종및 도입품종을 포함한 34품종을 대상으로 RAPD와 SSR 분석을 수행하였다. RAPD분석에서 총 37종의 선발된 임의primer를 분석하여 193개의 다형성 밴드(36.2%)를 얻었으며,평균 다형성 밴드 수는 5.6개였다. SSR 마커 26종을 이용하여 분석한 결과 총 112개의 대립인자가 확인되었고, 마커 당대립인자 수는 평균 4.3개였다. 유전적 다양성(PIC 값)은 평균 0.843이었고 범위는 0.536(CH03d12)-0.952(CH04c06)였다. RAPD와 SSR분석에서 획득된 305개의 다형성 밴드를이용하여 UPGMA(비가중 평균결합) 방식으로 유사도 및 집괴분석을 수행한 결과 유전적 유사도 0.640를 기준으로 4개의 그룹으로 분류되었다. 제1그룹에는 ‘서광’이 단독으로 분류되었고, 제2그룹에는 12품종이 속하였는데 ‘Spur Earliblaze’와 ‘Jonathan’을 제외하고 대부분 ‘Golden delicious’를 교배친으로 이용하여 육성된 품종이 분포하는 것으로 나타났다. 제3그룹에는 ‘Fuji’와 ‘Fuji’를 교배친으로 이용되여 선발된품종 및 그의 아조변이 품종 등 13개 품종이 속하였고 제4그룹에는 ‘홍로’, ‘감홍’, ‘새나라’ 등 8품종이 포함되었다. 품종간 유전적 유사도는 0.529-0.987의 범위로 평균 유전적 유사도는 0.647이었다. 가장 높은 유사도 값(0.987)을 나타낸 품종은 ‘화랑’과 ‘단홍’ 품종 간이었고 가장 낮은 유사도 지수(0.529)를 나타낸 품종은 ‘서광’과 ‘화랑’ 품종 간이었다. 본실험을 통해 사과 34품종 간의 유연관계는 알려진 pedigree 와 일치하는 것을 알 수 있었다.
Abstract
In this study, random amplified polymorphic DNA (RAPD) and simple sequence repeat (SSR) analyses were utilized for evaluation of genetic diversity of 34 Korean bred and introduced apple cultivars. Thirty-seven RAPD primers detected a total of 193 polymorphic bands (36.2%) with an average of 5.6. Twenty-six SSR markers generated a total of 112 alleles with an average 4.3 alleles per locus. Genetic diversity of 34 cultivars estimated by polymorphic information content (PIC) value ranged from 0.536 (CH03d12) to 0.952 (CH04c06) with an average of 0.843. By UPGMA (unweighted pair-group method arithmetic average) cluster analysis with 305 polymorphic bands, the apple cultivars were classified four groups by similarity index of 0.640. The ‘Seokwang’ was included in group I. Group II consisted of 12 cultivars which have ‘Golden Delicious’ in their pedigree,with the exception of ‘Spur Earliblaze’ and ‘Jonathan’. Group III included 13 cultivars which have usually ‘Fuji’ in their ancestry and bud sport of ‘Fuji’ cultivars. Group IV consisted of 8 cultivars with ‘Hongro’, ‘Gamhong’, and ‘Saenara’. Similarity values among the tested apple cultivars ranged from 0.529 to 0.987, and the average similarity value was 0.647. The similarity index was the highest (0.987) between ‘Hwarang’ and ‘Danhong’, and the lowest (0.529) between ‘Seokwang’ and ‘Hwarang’. The genetic relationships among the 34 studied apple cultivars were basically consistent with the known pedigree.
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