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RISS 인기검색어
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- 저자 : Chitikineni, Annapurna (검색결과 2 건)
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Genetic diversity of <i>Jatropha curcas</i> collections from different islands in Indonesia
Anggraeni, Tantri Dyah Ayu,Satyawan, Dani,Kang, Yang Jae,Ha, Jungmin,Kim, Moon Young,Chitikineni, Annapurna,Varshney, Rajeev K.,Lee, Suk-Ha Cambridge University Press 2018 Plant genetic resources Vol.16 No.4
<B>Abstract</B><P><I>Jatropha curcas</I> L. is a potential bioenergy crop but has a lack of improved cultivars with high yields and oil content. Therefore, increasing our understanding of <I>J. curcas</I> germplasm is important for designing breeding strategies. This study was performed to investigate the genetic diversity and population structure of Indonesian <I>J. curcas</I> populations from six different islands. To construct a reference, we <I>de novo</I> assembled the scaffolds (N50 = 355.5 kb) using 182 Gb Illumina HiSeq sequencing data from Thai <I>J. curcas</I> variety Chai Nat. Genetic diversity analysis among 52 Indonesian <I>J. curcas</I> accessions was conducted based on yield traits and single nucleotide polymorphism (SNP) markers detected by mapping genotyping-by-sequencing reads from Indonesian population to Chai Nat scaffolds. Strong variation in yield traits was detected among accessions. Using <I>J. integerrima</I> as an outgroup, 13,916 SNPs were detected. Among <I>J. curcas</I> accessions, including accessions from other countries (Thailand, the Philippines and China), 856 SNPs were detected, but only 297 SNPs were detected among Indonesian <I>J. curcas</I> populations, representing low genetic diversity. Through phylogenetic and structural analysis, the populations were clustered into two major groups. Group one consists of populations from Bangka and Sulawesi in the northern part of Indonesia, which are located at a distance of 1572.59 km. Group two contains populations from islands in the southern part: Java, Lombok-Sumbawa, Flores and Timor. These results indicate that introduction of diverse <I>J. curcas</I> germplasms is necessary for the improvement of the genetic variation in the Indonesian collections.</P>
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Ha, Jungmin,Shim, Sangrea,Lee, Taeyoung,Kang, Yang J.,Hwang, Won J.,Jeong, Haneul,Laosatit, Kularb,Lee, Jayern,Kim, Sue K.,Satyawan, Dani,Lestari, Puji,Yoon, Min Y.,Kim, Moon Y.,Chitikineni, Annapurna John Wiley and Sons Inc. 2019 Plant biotechnology journal Vol.17 No.2
<P><B>Summary</B></P><P><I>Jatropha curcas</I> (physic nut), a non‐edible oilseed crop, represents one of the most promising alternative energy sources due to its high seed oil content, rapid growth and adaptability to various environments. We report ~339 Mbp draft whole genome sequence of <I>J. curcas</I> var. Chai Nat using both the PacBio and Illumina sequencing platforms. We identified and categorized differentially expressed genes related to biosynthesis of lipid and toxic compound among four stages of seed development. Triacylglycerol (TAG), the major component of seed storage oil, is mainly synthesized by phospholipid:diacylglycerol acyltransferase in Jatropha, and continuous high expression of homologs of oleosin over seed development contributes to accumulation of high level of oil in kernels by preventing the breakdown of TAG. A physical cluster of genes for diterpenoid biosynthetic enzymes, including casbene synthases highly responsible for a toxic compound, phorbol ester, in seed cake, was syntenically highly conserved between Jatropha and castor bean. Transcriptomic analysis of female and male flowers revealed the up‐regulation of a dozen family of TFs in female flower. Additionally, we constructed a robust species tree enabling estimation of divergence times among nine <I>Jatropha</I> species and five commercial crops in Malpighiales order. Our results will help researchers and breeders increase energy efficiency of this important oil seed crop by improving yield and oil content, and eliminating toxic compound in seed cake for animal feed.</P>
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