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손재근,권용삼,김경민 慶北大學校農業科學技術硏究所 1997 慶北大農學誌 Vol.15 No.-
벼의 유묘기 저온처리하에 나타나는 chlorosis현상의 유전양식을 규명하기 위하여 실험한 결과를 요약하면 다음과 같다. 벼 21 공시품종 유묘기 저온(18℃)처리에서 chlorosis가 나타나는 품종은 통일형인 "밀양23호"와 인디카형인 "IR 36", "Dular"로 3품종이었고, 모든 자포니카형 품종에서는 chlorosis가 나타나지 않았다. 저온처리하의 엽록소 함량 감소는 품종군과 재배종간에 다양한 차이를 나타내었다. Dular와 Toyohatamochi가 교배된 F₂집단에서 저온처리에 의해 나타나는 제3엽의 chlorosis 현상에 대한 분리비는 정상 개체와 chlorsis 개체가 3:1의 이론적 분리비 적합하였다. 이결과로 벼의 유묘기 chlorosis의 유전은 단순열성 유전자에 의해 지배 되는 것으로 분석되었다. The purpose of this study was to determine the inheritance of chlorosis under low temperature at seedling stage of rice. The expression of chlorosis among 21 rice cultivars treated at 18℃ showed in one Tongil type cultivar. Milyang 23. and two Indica type cultivars. IR 36 and Dular. The sign of chlorosis was not appeared in all of the japonica type cultivars under the same treatment. The reduction of chlorophyll content under the low temperature was differed from varietal group and cultivars. The F₂population from a cross between Toyohatamochi and Dular segregated 3:1 ratio for normal and white phenotypes of third leaf. From the result, it was suggested that the chlorosis was controlled by a single recessive gene. The chlorosis rice detected from this study will be used as a good material for the genetic study related to photosynthetic ability of rice.
Kwon, Yong-Sham,Lee, Je-Min,Yi, Gi-Bum,Yi, Seung-In,Kim, Kyung-Min,Soh, Eun-Hee,Bae, Kyung-Mi,Park, Eun-Kyung,Song, In-Ho,Kim, Byung-Dong Korean Society for Molecular Biology 2005 Molecules and cells Vol.19 No.3
<P>This study was carried out to assess the potential of SSR markers for variety identification by comparing SSR markers and morphological traits in tests of distinctiveness, uniformity, and stability (DUS) of pepper (Capsicum annuum L.) varieties. Twenty-seven SSR markers were polymorphic in 66 pepper varieties, revealing a total of 89 alleles. Average polymorphism information content (PIC) value was 0.529, ranging from 0.03 to 0.877. Cluster analysis of the band patterns separated the varieties into three groups corresponding to varietal types. Morphological trait-based clustering showed some degree of similarity to dendrogram topologies based on the SSR index. However, no significance correlation was found between the SSR and morphological data. SSR markers could be used to complement a DUS test of a candidate variety and to select complimentary varieties by pre-screening existing varieties in the context of protecting new varieties of pepper.</P>
Yong-Sham Kwon,Kyung-Min Kim,Do-Hoon Kim,은무영,Jae-Keun Sohn 한국분자세포생물학회 2002 Molecules and cells Vol.14 No.1
A marker-assisted selection (MAS) breeding program was used to improve the plant regenerability of indica rice. A significant quantitative trait loci (QTL) that is associated with the capacity for green plant regenera-tion in the anther culture of rice was mapped on chromosome 10 using recombinant inbred (RI) popu-lation from Milyang 23/Gihobyeo. The marker that was chosen to follow the QTL region was used in MAS. This marker co-segregated with the regeneration abil-ity in F2 individuals that were derived from MGRI 079/IR 36. In order to clarify the relationship between this marker and plant regenerability, the backcross population was screened with a RFLP marker. The capacity of plant regeneration of the backcross popu-lation was clearly distinguished by the marker geno-type. The development of near isogenic line (NILs) with high regenerability through MAS will save time, labor, and cost in indica rice breeding.
Construction of a Microsatellite Database Containing 325 Rice Varieties (Oryza sativa L.)
Yong-Sham Kwon,Keun-Jin Choi 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Microsatellite marker is one of the most suitable markers for variety identification as it has great discrimination power for varieties with limited genetic variation. The suitability of simple sequence repeat (SSR) markers for varietal identification and genetic diversity were evaluated for 325 rice varieties. Four hundred thirty six pairs of SSR primers were screened against 11 rice varieties. Twenty six primer pairs were highly polymorphic and reproducible. These primer sets were used to construct a DNA profile database containing 325 rice varieties grown in Korea through automatic detection system (ABI 3130XL). Microsatellite polymorphism was showed to be high. A total of 331 polymorphic amplified fragments were obtained by using 26 microsatellite markers. The number of alleles per locus ranged from 9 to 18 with an average of 12.73 alleles per locus. The average polymorphism information content (PIC) was 0.734 ranging from 0.555 to 0.880. Three hundred thirty one SSR loci were used to calculate Jaccard’s distance coefficients for UPGMA cluster analysis. These varieties were separated into several distinctive groups corresponding to varietal types. Almost all of the varieties were discriminated by SSR marker genotypes. This information may be useful to select comparative variety through comparison of genetic relationship analysis between existing variety and candidate varieties in distinctive tests.
Use of Microsatellite Markers to Identify Commercial Melon (Cucumis melo L.) Varieties
Yong-Sham Kwon,Keun-Jin Choi 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Microsatellite is one of the most suitable markers for variety identification as it has great discrimination power for varieties with narrow genetic variation. The relationship between marker genotypes and 58 melon varieties was analyzed. Of the 400 pairs of simple sequence repeat (SSR) primers screened against 11 melon varieties. 28 pairs showed highly polymorphism on the basis of PIC (Polymorphism Information Contents) value. These markers were applied to constructing DNA profile data base of 58 major melon varieties through multiplex PCR and fluorescence based automatic detection system. A total of 111 polymorphic amplified fragments were obtained by using 28 SSR markers. The average of PIC value was 0.643 ranging from 0.401 to 0.846. One hundred eleven SSR loci were used to calculate Jaccard’s distance coefficients for UPGMA cluster analysis. A clustering group of varieties, based on the results of SSR analysis, were categorized into plant shape and fruit type. Almost all of the varieties were discriminated by marker genotypes. This information may be used to select comparative variety through comparison of genetic relationship between existing variety and candidate varieties in distinctive tests and protection of plant breeders’ intellectual property rights through variety identification.
Yong-Sham Kwon,Jee-Hwa Hong,Keun-Jin Choi 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07
Microsatellites are one of the most suitable markers for variety identification as it has great discrimination power for varieties with narrow genetic variation. The polymorphism level between forty microsatellite primer pairs and 148 soybean varieties was investigated through fluorescence based automatic detection system. A set of 16 primer pairs showed highly reproducible and polymorphic in these varieties. A total of 204 alleles were detected by using 16 microsatellite markers. The number of alleles per locus ranged from 6 to 28 with an average of 12.75 alleles per locus. The average polymorphism information content (PIC) was 0.86 ranging from 0.75 to 0.95. Two hundred four microsatellite loci were used to calculate Jaccard’s distance coefficients for unweighted pair group method using the arithmetic averages cluster analysis. These varieties were separated into several distinctive groups corresponding to varietal types. All of the varieties were perfectively discriminated by markers genotypes. This information may be useful to compare through genetic relationship analysis between existing and candidate varieties in distinctive tests and protection of plant breeders’ intellectual properties rights through variety identification.