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BACKGROUND The advent of genomics-based technologies has revolutionized many fields of biological enquiry. However, chromosome walking or flanking sequence cloning is still a necessary and important procedure to determining gene structure. Such methods are used to identify T-DNA insertion sites and so are especially relevant for organisms where large T-DNA(More)
This study describes a plant regeneration system for Rosa hybrida ‘Samantha’, a mainstream commercial cultivar, via direct somatic embryogenesis. Somatic embryogenesis was induced from in vitro-derived leaf explants, achieving a frequency of 7.5% following 8 weeks of culture on a Murashige and Skoog (MS) medium supplemented with 3.0 mg/L(More)
The potential for transgene dispersal through pollen, fruit, and seed is an important argument against the release of genetically modified plants. One approach toward addressing the concerns of gene flow from transgenic crops into closely related wild species involves in the use of tissue-specific promoters to engineer male and/or female sterility. In this(More)
Tissue-specific promoters can drive genes specifically expressed in the target organs and have been widely used in plant molecular breeding. In this study, a 1.2-kb promoter region of an anther-specific gene PhLRR from Petunia hybrida “Fantasy” was isolated and fused to the β-glucuronidase (GUS) gene. The pPhLRR::GUS vector was heterogeneously transformed(More)
Flower color is the main character throughout the plant kingdom. Though substantial information exists regarding the structural and regulatory genes involved in anthocyanin and flavonol biosynthesis, little is known that what make a diverse white vs. red color flower in natural species. Here, the contents of pigments in seven species from varied(More)
An efficient and reproducible Agrobacterium-mediated transformation system via repetitive secondary somatic embryogenesis was developed for Rosa rugosa ‘Bao white’. Somatic embryogenesis was induced from in vitro-derived unexpanded leaflet explants on MS medium supplemented with 4.0 mg/L 2,4-dichlorophenoxyacetic acid (2,4-D), 0.05 mg/L Kinetin and 30 g/L(More)
Odd traits in few of plant species usually implicate potential biology significances in plant evolutions. The genus Helwingia Willd, a dioecious medical shrub in Aquifoliales order, has an odd floral architecture-epiphyllous inflorescence. The potential significances and possible evolutionary origin of this specie are not well understood due to poorly(More)
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