Soichiro Nishiyama

Soichiro Nishiyama
Kyoto University | Kyodai · Division of Agronomy and Horticultural Science

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20
Publications
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98
Citations

Publications

Publications (20)
Article
Full-text available
Genetic variation in phenological traits is the key in expanding production areas of crops. Southern highbush blueberry (SHB) is a blueberry cultivar group adapted to warmer climates and has been developed by multiple interspecific hybridizations between elite northern highbush blueberry (NHB) ( Vaccinium corymbosum L.) and low-chill Vaccinium spec...
Article
Full-text available
Unreduced gametes (2n gametes), possessing double the haploid genome, whatever ploidy that happens to be, are a common source of ploidy variation in plant populations. First and second division restitution (FDR and SDR) are the dominant mechanisms of 2n gamete production; all else being equal, FDR gametes have a higher degree of heterozygosity, thu...
Conference Paper
Bud dormancy broadly affects factors related to tree growth and development, including blooming date and leafing date (LD), which are important phenological traits associated with fruit production. We previously identified significant quantitative trait loci (QTLs) for the leaf bud chilling requirement, heat requirement, and LD on Prunus consensus...
Article
Interspecific hybridization is a common breeding approach for introducing novel traits and genetic diversity to breeding populations. Southern highbush blueberry (SHB) is a blueberry cultivar group that has been intensively bred over the last 60 years. Specifically, it was developed by multiple interspecific crosses between northern highbush bluebe...
Article
We previously identified the FLOWERING LOCUS C (FLC)-like gene, a MADS-box transcription factor gene that belongs to Arabidopsis thaliana FLC clade, in apple (Malus x domestica), and its expression in dormant flower buds is positively correlated with cumulative cold exposure. To elucidate the role of the MdFLC-like in the dormancy process and flowe...
Article
Endodormancy release and the fulfillment of the chilling requirement (CR) are critical physiological processes that enable uniform blooming in fruit tree species, including apple (Malus ×domestica). However, the molecular mechanisms underlying these traits have not been fully characterized. The objective of this study was to identify potential mast...
Article
Full-text available
Bud dormancy is an important developmental stage affecting blooming date and leafing date (LD) in Japanese apricot (Prunus mume), but the genetic factors controlling the chilling requirement (CR) and heat requirement (HR) for dormancy release and bud burst time remain to be elucidated. Here, a quantitative trait locus (QTL) analysis using two F1 se...
Article
Full-text available
Main conclusion: Transcriptome analysis of a persimmon population segregating for an astringency trait in fruit suggested central roles for a limited number of transcriptional regulators in the loss of proanthocyanidin accumulation. Persimmon (Diospyros kaki; 2n = 6x = 90) accumulates a large amount of proanthocyanidins (PAs) in its fruit, resulti...
Article
Persimmon (Diospyros kaki) is a tree crop species that originated in East Asia, consists mainly of hexaploid individuals (2n = 6x = 90) with some nonaploid individuals. One of the unique characteristics of persimmon is the continuous accumulation of proanthocyanidins (PAs) in its fruit until the middle of fruit development, resulting in a strong as...
Article
Japanese persimmon ‘Totsutanenashi’ (TTN) is a spontaneous small fruit mutant derived from ‘Hiratanenashi’ (HTN). To characterize the small fruit phenotype of TTN, we carried out a histological analysis, plant growth regulator treatments, and a transcriptome analysis using Illumina sequencing. The parenchymal cell number in TTN fruit was significan...
Article
Sexuality of crops affects both cultivation and breeding systems. Cultivated persimmon (Diospyros kaki Thunb) has a morphologically well-characterized polygamous or gyonodioecious sexual system. However, the genetic basis of sexuality in D. kaki has yet to be characterized. Here, we used dioecious D. lotus L., a diploid wild relative species to hex...
Article
Mangosteen, known as the queen of tropical fruits, has a unique sexual reproductive feature; that is, it can produce seeds without fertilization by apomixis. Interestingly, all seeds in mangosteen fruit are produced by apomixis, since the mangosteen tree is dioecious and no male trees have been found. As mangosteen is mainly propagated by seeds, al...
Article
Persimmon fruit accumulates large quantities of tannins and has astringent taste. However, there is a mutation type, in which the fruit stops tannin accumulation at early stages of development and loses astringency naturally on the tree. This mutation is called pollination constant and non-astringent (PCNA), since the fruit of this type can lose as...

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