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Genome-Wide Association Study of Rice Core Set Related to Grain Weight
( Buung Choi ),( Ji-min Yoo ),( Sang-beom Lee ),( Gyeong-jin Kim ),( Kyu-won Kim ),( Ji-hyock Yoo ),( Kyeong-seok Oh ),( Byeong-churl Moon ),( Wook-han Kim ),( Yoo-hyun Cho ),( Sang-won Park ),( Yong- 한국육종학회 2018 Plant Breeding and Biotechnology Vol.6 No.3
Rice is being consumed in over 50% of the world's population, and it is main food in Korea. Many accessions of rice have been utilized for breeding purposes such as the use for functional food, disease resistance, improved quality and yield. In this study, the 1000-grain weight, one of important components for yield in rice, was investigated and analyzed by conducting a genome-wide association study (GWAS) using whole genome SNP genotype data on 295 Korean rice core sets. Four genes, Os01g0315700, Os03g0604566, Os04g0413500 and Os05g0216950, are significantly associated with 1000-grain weight. We presume carefully that the function of these kind genes will help in the selection of intermediate parents with high yield and genetic markers to develop new varieties.
Evolutionary study for rice iron uptake from Korean authentic rice core set
Buung Choi,Min-Young Yoon,Tae-Sung Kim,Kyu-Won Kim,Donghwan Shim,Beom-Seok Park,Won-Il Kim,Yong-Jin Park 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Iron is an essential mineral found in every cell of the human body to make the oxygen-carrying proteins hemoglobin and myoglobin. More than 2 billion people face Fe deficiency. Rice can be a potentially valuable source to supplement that mineral since it is staple food for two-thirds of the world’s population. To bring the nutritional level of the milled product up to that of the whole grain (brown), rice should be enriched with thiamin, niacin and iron. Also iron has important role that absorption from the photosynthetic cells proceeds, chlorophyll synthesis and the growth process of the plant. Orthologous genes, which are homologous genes that diverged after a speciation event, generally maintain a similar function in different species. We applied a McDonald-Kreitman Test (MKT) to examine more than 10,000 orthologous genes between rice (Oryza sativa) and Brachypodium (outgroup) based on different phenotypic groups. This analysis was undertaken to find fast evolutionary genes in rice iron uptake. Three groups were separated based on the phenotype and each group was examined with the outgroup for MKT. Fast evolutionary genes that have a positive selection with FDR ≤ 0.05 were detected at each groups. Annotation of these genes were conducted and the predicted functions were also discussed here. And also, the association study between the candidate gene related to iron uptake phenotype was performed. These results support that using this orthologous based method, we may find some important candidate genes underlying the ion uptake in rice.
비소 오염지에서 재배된 벼 선발집단의 미네랄 함량 차이
최부웅 ( Buung Choi ),이상범 ( Sang-beom Lee ),김경진 ( Gyeong-jin Kim ),류지혁 ( Ji-hyock Yoo ),오경석 ( Kyeong-seok Oh ),문병철 ( Byeong-churl Moon ),김욱한 ( Wook-han Kim ),정남진 ( Nam-jin Chung ),박상원 ( Sang-won Park ) 한국환경농학회 2017 한국환경농학회 학술대회집 Vol.2017 No.-
세계 3대 식량작물로 전 세계 인구의 50% 이상이 섭취하고 있는 쌀은 주로 아시아 지역에서 재배되며 미네랄, 비타민 등이 풍부하고 영양적 가치가 높아 우리나라에서도 오래 전부터 주식으로 이용해 왔다. 현재까지 우리나라에서 육성 및 재배된 벼는 95% 이상이 자포니카(japnonica type) 품종으로 이루어져 있다. 최근 급속한 기후변화에 따라 향후 30~50년 뒤에는 대부분의 품종이 인 디카(indica type) 품종으로 대체될 것으로 전망되고 있다. 그런데 인디카 품종은 상대적으로 자포니카 품종 보다 비소 등 중금속뿐만 아니라 다양한 미네랄을 많이 흡수 한다는 연구 결과들이 보고되고 있다. 벼 선발집단 295종을 비소 등 중금속이 오염된 농경지에서 재배한 다음 미네랄 27종을 ICP-MS로 정량분석한 결과 전반적으로 인디카 품종들이 자포니카 품종등 다른 생태형 품종들 보다 비소를 포함한 중금속뿐만 아니라 기능성 미네랄들의 함량이 높은 것으로 나타났다. 향후 정확한 미네랄 흡수·축적에 대한 메카니즘과 미네랄 네트워크 분석이 필요한 것으로 판단된다.