38 Result(s)
within
Life Sciences
Plant Genetics and Genomics
Hee-Jong Koh
Article
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Article
Molecular map** of a gene ‘ld(t)’ controlling cleistogamy in rice
Cleistogamy is the self-pollination within closed spikelets and is expected to be a useful genetic tool for prevention of possible gene transfer in transgenic crops, for maintenance of genetic purity in autoga...
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Article
The serine proteinase inhibitor OsSerpin is a potent tillering regulator in rice
Tillering in rice (Oryza sativa L.) is an important agronomic trait that enhances grain production. A tiller is a specialized grain-bearing branch that is formed on a non-elongated basal internode that grows inde...
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Article
Fine map** and candidate gene analysis of hwh1 and hwh2, a set of complementary genes controlling hybrid breakdown in rice
Hybrid breakdown (HB), a phenomenon of reduced viability or fertility accompanied with retarded growth in hybrid progenies, often arises in the offspring of intersubspecific hybrids between indica and japonica in...
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Article
Development of SNP-based CAPS and dCAPS markers in eight different genes involved in starch biosynthesis in rice
Single nucleotide polymorphisms (SNPs), which are inexhaustible, highly stable, and simply detectable sequence polymorphisms, can lead to phenotypic variations by affecting protein composition changes. Here, w...
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Molecular characterization and physico-chemical analysis of a new giant embryo mutant allele (ge t) in rice (Oryza sativa L.)
The rice embryo is rich in lipid and protein bodies, bioactive chemicals such as dietary fiber, phytic acids, vitamin B and E, and gamma aminobutyric acid (GABA) than the endosperm. In this paper, we report a ...
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Article
Map-based cloning of the ERECT PANICLE 3 gene in rice
Panicle architecture in rice can have a strong influence on yield. Using N-methyl-N-nitrosourea mutagenesis, we isolated an erect panicle mutant, Hep, from Hwasunchalbyeo, a glutinous japonica rice cultivar. Gene...
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Article
High-resolution map** of two rice brown planthopper resistance genes, Bph20(t) and Bph21(t), originating from Oryza minuta
Brown planthopper (BPH) is one of the most destructive insect pests of rice. Wild species of rice are a valuable source of resistance genes for develo** resistant cultivars. A molecular marker-based genetic ...
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Article
Identification of QTLs for hybrid fertility in inter-subspecific crosses of rice (Oryza sativa L.)
Two subspecies in rice, japonica and indica, have their own ecotypic traits. However, reproductive barriers such as spikelet sterility in hybrid progenies between subspecies have been an obstacle in breeding prog...
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Article
Fine map** and candidate gene analysis of dense and erect panicle 3, DEP3, which confers high grain yield in rice (Oryza sativa L.)
Architecture of the rice inflorescence, which is determined mainly by the morphology, number and length of primary and secondary inflorescence branches, is an important agronomical trait. In the current study,...
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QTL analyses of heterosis for grain yield and yield-related traits in indica-japonica crosses of rice (Oryza sativa L.)
Two sets of rice materials, 166 RILs derived from a cross between Milyang 23 (Korean indica-type rice) and Tong 88-7 (japonica Rice), and BC1F1 hybrids derived from crosses between the RILs and the female parent,...
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Article
QTLs for hybrid fertility and their association with female and male sterility in rice
Hybrid sterility is one of the major barriers to the application of wide crosses in plant breeding and is commonly encountered in crosses between indica and japonica rice varieties. Ten map** populations compri...
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Article
Tiller formation in rice is altered by overexpression of OsIAGLU gene encoding an IAA-conjugating enzyme or exogenous treatment of free IAA
Optimization of plant architecture is important for cultivation and yield of cereal crops in the field. Tillering is an essential factor used to determine the overall architecture of cereal crops. It has long ...
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Morphological and genetic characterization of off-type rice plants collected from farm fields in Korea
Off-type rice plants occurring in farm fields cause yield loss due to competition with cultivated rice, in addition to hindering field management and harvest work. This study aimed to observe the agronomic cha...
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Article
Gene identification using rice genome sequences
Identifying useful gene(s) is one of the most important objectives of plant geneticists. Various strategies can be used, which are based on the characteristics of plant reproduction and available technology. R...
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Article
Genetic map** and QTL analysis for yield and agronomic traits with an F2:3 population derived from a waxy corn × sweet corn cross
We constructed a framework map using SSR markers in the F2 population derived from a cross between a waxy corn inbred line and a sweet corn inbred line. We constructed a genetic linkage map of the F2:3 population...
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Article
Fine map** and candidate gene analysis of a new mutant gene for panicle apical abortion in rice
The rice panicle architecture depends on the arrangement of branches and spikelets which directly affect grain yield. We identified a mutant for panicle apical abortion (PAA-Hwa) from a japonica cultivar Hwacheon...
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Article
Open AccessAnalysis of segregation distortion and its relationship to hybrid barriers in rice
Segregation distortion (SD) is a frequently observed occurrence in map** populations generated from crosses involving divergent genotypes. In the present study, ten genetic linkage maps constructed from reci...
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Open AccessDefining the genome structure of `Tongil' rice, an important cultivar in the Korean "Green Revolution"
Tongil (IR667-98-1-2) rice, developed in 1972, is a high-yield rice variety derived from a three-way cross between indica and japonica varieties. Tongil contributed to the self-sufficiency of staple food producti...
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Article
Open AccessIdentifying and confirming quantitative trait loci associated with heat tolerance at flowering stage in different rice populations
Climate change is affecting rice production in many countries. Develo** new rice varieties with heat tolerance is an essential way to sustain rice production in future global warming. We have previously repo...
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Genome-wide transcriptome comparison of flag leaves among japonica and indica varieties
Flag leaves in crops are one of the key organs determining grain yield, which significantly affects total yield. However, our understanding of the molecular and genetic regulation of flag leaves is very limite...
