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Plant Breeding Lab
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The lab explores the genetics and breeding of rice through genes and evolution.
AboutAbout the lab
Exploring genetics and breeding through rice
Since its founding, the Plant Breeding Lab has consistently conducted research in genetics and breeding on rice.
Rice is one of the world's three major cereals and the most important crop when considering the world's food problems.
The lab pursues research on locating genes, research on the evolution and differentiation of cultivated rice, and research on observing chromosomes.
The lab uses sets of experimental rice lines it has developed as materials for this research.
Key terms
- Map-based cloning
- A method of isolating and studying a gene using its position on a chromosomal map as a clue.
- DNA marker
- A DNA difference among varieties or individuals. It is used as a landmark for locating genes and for selecting lines.
- Experimental line sets
- A group of rice lines that the lab creates through crossing and DNA marker selection, serving as materials for gene analysis.
ResearchResearch themes
The lab conducts research in genetics and breeding using rice as experimental material. Using experimental lines developed in the lab, it carries out gene mapping and cloning, studies the inheritance of various traits, investigates the evolution of cultivated rice, and analyzes chromosomes.
*Illustrative imageLocating and Isolating Genes
The lab works on linkage analysis, which determines the positions of genes on chromosomes, and on map-based cloning, which isolates a gene using that positional information as a clue. It is carrying out cloning of genes that have been analyzed genetically.
*Illustrative imageInheritance of Various Traits in Rice
The lab studies the inheritance of traits related to domestication such as seed shattering and grain size, as well as hybrid sterility, heading time, and resistance to pests such as the green rice leafhopper. Using materials developed through DNA marker selection, it develops evaluation methods, searches for genetic resources, and performs gene mapping.
*Illustrative imageEvolution and Differentiation of Cultivated Rice
The lab considers that wild rice in tropical Asia split into many lineages and that cultivated rice arose as humans harvested it, and it studies the differentiation of cultivated rice collected from around the world. By comparing DNA differences between cultivated species and closely related wild species, it explores the phylogenetic relationships within the genus Oryza.
*Illustrative imageCytogenetics: Examining Rice Chromosomes
Using an enzyme-based method, the lab prepares specimens of rice chromosomes, which have been difficult to observe, and analyzes them. It develops lines in which a single wild-species chromosome is added to cultivated rice, and investigates the characteristics of the wild species and the possibility of introducing useful genes into cultivated rice.
MembersFaculty
The members of the Plant Breeding Lab consist of faculty, project faculty, doctoral, master's, and undergraduate students, technical staff, and technical assistants.
- ProfessorHideshi Yasui
- Project ProfessorAtsushi Yoshimura
- Associate ProfessorYoshiyuki Yamagata
- Project LecturerKhin Thanda Win
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Perennial rice breeding nursery” Desmanthus4food / CC BY-SA 3.0 us (cropped)
- Locating and Isolating Genes: “Agarose Gel DNA Electrophoresis” Ajay Kumar Chaurasiya / CC BY-SA 4.0 (cropped)
- Inheritance of Various Traits in Rice: “Oryza sativa Ear rice Stugaru roman rice IMG 4234” あ
おもりくま,(Aomorikuma) / CC BY-SA 4.0 (cropped) - Evolution and Differentiation of Cultivated Rice: “Wild rice harvest on Mud Lake” U.S. Army Corps of Engineers / Public domain (cropped)
- Cytogenetics: Examining Rice Chromosomes: “Drosophila metaphase chromosomes female” J. Albert Vallunen (albval) / CC BY-SA 2.5 (cropped)
- Related lab (Agricultural Production System Design Lab): “Stubble field with tractor and other farm machinery - geograph.org.uk - 4683057” Trevor Littlewood / CC BY-SA 2.0 (cropped)
- Related lab (Crop Science Lab): “Khndzoresk, Wheat field, Armenia” Vyacheslav Argenberg / CC BY 4.0 (cropped)
- Related lab (Aquatic Molecular Developmental Biology Lab): “Oryzias latipes(Hamamatsu,Shizuoka,Japan,2007)-2” Seotaro / CC BY-SA 3.0 (cropped)
- Related lab (Zoology Lab): “IVF laboratory” Galina Fomina / CC BY 4.0 (cropped)
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