Y. Ukai

Publications95
h-index17
Citations1,816
Highly Influential Citations197
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SHAPE: a computer program package for quantitative evaluation of biological shapes based on elliptic Fourier descriptors.
Quantitative evaluation of the shapes of biological organs is often required in various research fields, such as agronomy, medicine, genetics, ecology, and taxonomy. Elliptic Fourier descriptors… Expand
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Evaluation of variation of root shape of Japanese radish (Raphanus sativus L.) based on image analysis using elliptic Fourier descriptors
Variation was of root shape in Japanese radish, due to genotypes, soil types and growth stages, were quantitatively evaluated by principal components scores based on elliptic Fourier descriptors.… Expand
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Linkage map of restriction fragment length polymorphism loci in rice.
We have constructed a genetic map of the nuclear genome in rice (Oryza sativa L.), utilizing 322 restriction fragment length polymorphism (RFLP) DNA markers and nine morphologlcal and biochemical… Expand
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The Evaluation of Genotype × Environment Interactions of Citrus Leaf Morphology Using Image Analysis and Elliptic Fourier Descriptors
Variations of leaf form, i.e., differences in shape and size, among citrus varieties and the genotype × environment (GE) interactions influencing the variations were examined. Leaf shape was… Expand
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Quantitative trait loci for phyllochron and tillering in rice
Morphogenetic processes in sequentially growing leaves and tiller buds are highly synchronized in rice (Oryza sativa L.). Consequently, the appearance of successive leaves in the main tiller acts as… Expand
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Method for mapping a partial lethal-factor locus on a molecular-marker linkage map of a backcross and doubled-haploid population
Abstract Distorted segregation has been repeatedly observed in various plant species in molecular-marker linkage mapping where distant crosses were made. It may be caused by a partial lethal-factor… Expand
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MAPL: A package of computer programs for construction of DNA polymorphismlinkage maps and analysis of QTL
We have recently developed a package of programs named MAPL which can be used for construction of DNA polymorphism linkage maps from segregatrion data in F2, backcross, and dihaploid derived from a… Expand
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Optimal Spatial and Temporal Measurement Repetition for Selection in Japanese Persimmon Breeding
Genetic and environmental variances for fruit ripening time (FRT), fruit weight, and soluble solids concentration (SSC) in Japanese persimmon (Diospyros kaki Thunb.) were estimated. The variance… Expand
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Comparison of QTLs for Early Elongation Ability between Two Floating Rice Cultivars with a Different Phylogenetic Origin
The ability to initiate stem elongation at the early growth stages of a plant is the major survival mechanism of floating rice in the presence of flooding. We previously identified two quantitative… Expand
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Estimation of the position and effect of a lethal factor locus on a molecular marker linkage map
In the mapping of DNA markers the distortion of segregation of marker genotypes is often observed, which may be caused by a lethal factor acting in filial generations derived from distant crosses. A… Expand
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