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RISS 인기검색어
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- 저자 : Mong-Huai (검색결과 2 건)
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Genetic Diversity of a Novel Oil Crop, Camellia brevistyla, Revealed by ISSR DNA Markers
Mong-Huai Su,Te-Hua Hsu,Chun-Neng Wang,Kuan-Hung Lin,Ming-Chang Chiang,Ren-Dong Kang,Khiem M. Nguyen,Hoang Nguyen 한국원예학회 2017 원예과학기술지 Vol.35 No.5
Camellia brevistyla plants are used as food oil in Taiwan. To provide a method for identifying germplasm and assessing the genetic diversity of C. brevistyla , 102 individuals were collected from 29 populations in 11 counties throughout the main island of Taiwan. Inter-simple sequence repeat (ISSR) DNA markers were analyzed and a total of 176 bands were amplified. Of these, 175 bands were found to be polymorphic in these populations. Genetic similarities among populations ranged between 34.1-95.1%. Cluster analysis revealed seven groups of populations plus one outlier (C. kissii ). Five individuals from two populations in the southern region were grouped into cluster V, and six populations from both regions were grouped into cluster VII. The remaining populations from the northern region were separated into different clusters from V and VII. Results of an analysis of molecular variance indicated that the variation within populations (75%) was predominantly greater than variations among counties (18%) and among regions (7%). Overall, the gene flow (Nm = 0.509) estimated from genetic differentiation (Gst = 0.534) suggested that gene flow among regions was limited. Higher genetic diversity (H = 0.317), Shannon’s index (I = 0.477), and gene flow (Nm = 0.538) of populations were found in the northern region compared to the southern region. The DNA sequences of C. brevistyla amplified by two oil-biosynthesis genes showed 99-100% homology with those of C. oleifera. Camellia brevistyla populations are highly differentiated and can serve as a basis for the food oil industry as a germplasm resource.
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류영일,김일령,Mong-Huai Su,정종덕,최홍근,김창균 한국식물학회 2019 Journal of Plant Biology Vol.62 No.1
Intraspecific genetic variation provides theinformation on the distributional pattern of plant species byinducing local adaptation, range shifts, and range reduction. Here, genetic variation of amplified fragment lengthpolymorphism (AFLP) and three chloroplast DNA (cpDNA)regions (atpI-atpH, trnD-psbM, and trnT-L) is investigated in37 populations of Camellia japonica to assess the geneticdiversity and population structure. We also infer thephylogeographical history of C. japonica distributed inSouth Korea, Japan (Kyushu and Okinawa), and Taiwan ofEast Asia. The AFLP results reveal high levels of geneticdiversity in C. japonica across East Asia. At the regionallevel, the Kyushu populations display the highest level ofgenetic variation, whereas the mainland populations of SouthKorea exhibit the lowest level of variation. Our results showtrends of loss of genetic diversity along with latitude. On thebasis of 154 polymorphic sites of the combined three cpDNAregions, 11 haplotypes (A-K) were identified across the EastAsian C. japonica populations. Haplotypes A-C are dominantand widespread in South Korea and Japan, while HaplotypesG, I, and J in Taiwan. In addition, five haplotypes (A, B, D-F)are exclusively occur in South Korea/Japan and five (G-K) arein Taiwan. Our molecular dating analysis estimates the age ofinitial diversification of C. japonica haplotypes in the lateTertiary. The phylogeographic patterns of C. japonica coupledwith molecular dating suggest vicariance as key mechanismfor initial diversification between South Korea/Japan andTaiwan. In contrast, the haplotypes of Japan are shared withthose of South Korea indicating that they had insufficienttime to form population structures at the regional level.
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