Development of a SCAR Marker Linked to Male Fertility Traits in ‘Jinkyool’(Citrus sunki)

국문 초록 (Abstract)

감귤류 중 수술이 퇴화되어 웅성불임형질을 나타내는 ‘청견’ 품종에 정상적인 수술의 형태를 가진 웅성가임인 ‘진귤’ 품종을 교배하여 150개체의 F₁ 집단을 구축하여 수술이 퇴화되는 개체와 정상인 개체를 분리하였다. 분리된 F₁ 개체들을 사용하여 SRAP 기법과 집단 분리 분석법(BSA)을 조합하여 웅성 가임 연관 마커 개발에 활용하였 다. F1 집단 내 150개체 중 66개체가 퇴화 수술을 갖고 있으며 웅성 가임성과 웅성 불임성의 분리비는 1:1이며 χ² 값은 2.16(p=0.05)이었다. 197개의 SRAP 프라이머 조합들 중 웅성가임 특이밴드를 형성하는 3개의 SRAP 프라이머 조합(F4/R27, F39/R60, 및 F15/R37)을 선발하였으며, 이 중 F39/R60 프라이머에 특이적으로 증폭하는 DNA단편의 염기서열을 기본으로 하여 새롭게 작성한 양방향 프라이머 조합 중 웅성 가임 계통에서만 약 1.4 Kb의 특이밴드를 증폭하는 프라이머 조합, pMS 33U/pMS 1462L를 선발하여 SCAR 마커를 개발 하였다. 이러한 결과는 개발된 SCAR 마커로 무핵성 계통들의 육종 선발에 효율성을 높일 수 있을 것으로 기대된다.

다국어 초록 (Multilingual Abstract)

In Citrus, an F1 segregation population of 150 plants was constructed from a cross between ‘Kiyomi’ (C. unshiu × C. sinensis) carrying the male sterility trait and ‘Jinkyool’ (C. sunki). Sequence-related amplification polymorphism (SRAP) combined with bulked segregant analysis was used to develop markers linked to male fertility. In the F1 population, 66 out of 150 seedlings had aborted anthers and the ratio of male sterile plants to fertile plants in the progenies matched the expected Mendelian segregation ratio of 1:1 (χ² =2.16 at p=0.05). From the profiling of the 197 SRAP primer sets, three SRAP primer sets (F4/R27, F39/R60, and F15/R37) that were closely linked to the target trait were identified and successfully converted into a sequence characterized amplified region (SCAR) marker for selection of male fertility in citrus. The SCAR marker, using the pMS 33U/pMS 1462L primer set specifically, produced a single 1.4-Kb fragment that was linked to male fertility. Our results suggested that this SCAR marker can be useful for marker-assisted selection of male sterile individuals in breeding F₁ progenies in Citrus.

목차 (Table of Contents)

• Introduction
• Materials and Methods
• Results and Discussion
• Acknowledgment
• References
• 초록

참고문헌 (Reference)

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