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Triangle of U

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The triangle of U ( ) is a theory about the evolution and relationships among the six most commonly known members of the plant genus Brassica. The theory states that the genomes of three ancestral diploid species of Brassica combined to create three common tetraploidvegetables and oilseed crop species. It has been confirmed by studies of DNA and proteins.

BrassicaBrassicaBrassica () is a genus of plants in the cabbage and mustard family (Brassicaceae). The members of the genus are informally known as cruciferous vegetables, cabbages, mustard plants, or simply brassicas. Crops from this genus are sometimes called cole crops—derived from the Latin caulis, denoting the stem or stalk of a plant.ChromosomeChromosomeDNA molecule containing genetic material of a cellDifferent representations of chromosomesMain parts of a condensed chromosomeCondensed chromosome (purple rod) inside a bone marrow erythrokaryocyte undergoing mitosisDiagram of a duplicated and condensed metaphase eukaryotic chromosome: ChromatidCentromereShort armLong armA chromosome is a package of DNA containing part or all of the genetic material of an organism.OvuleOvuleThe ovule (from Latin: ovulum) is a small structure present in a seed plant's floral ovary that gives rise to and contains its female reproductive cells. It consists of three parts: the integument, forming its outer layer, the nucellus (or remnant of the megasporangium), and the female gametophyte (formed from a haploid megaspore) in its center. The female gametophyte — specifically termed a megagametophyte — is also called the embryo sac in angiosperms.GameteGameteA gamete ( GAM-eet ), reproductive cell, or sex cell, is a haploid cell that fuses with another haploid cell during fertilization in organisms that reproduce sexually. The name gamete was introduced by the German cytologist Eduard Strasburger in 1878. The type of gamete an organism produces determines its sex and sets the basis for the sexual roles and sexual selection. Female gametes are called ova or egg cells, and male gametes are called sperm.PolyploidyPolyploidyPolyploidy is a condition in which the cells of an organism have more than two paired sets of (homologous) chromosomes. Most species whose cells have nuclei (eukaryotes) are diploid, meaning they have two complete sets of chromosomes, one from each of two parents; each set contains the same number of chromosomes, and the chromosomes are joined in pairs of homologous chromosomes. However, some organisms are polyploid. Polyploidy is especially common in plants.GenomeGenomeIn the fields of molecular biology and genetics, a genome is all the genetic information of an organism. It consists of nucleotide sequences of DNA (or RNA in RNA viruses). The nuclear genome includes protein-coding genes and non-coding genes, other functional regions of the genome such as regulatory sequences (see non-coding DNA), and often a substantial fraction of junk DNA with no evident function. Almost all eukaryotes have mitochondria and a small mitochondrial genome.Japanese peopleJapanese peopleLanguagesJapaneseReligionPrimarily, in a traditional/cultural context, a mix of Shinto and Buddhism; minorities ascribe to Christianity and other religionsRelated ethnic groupsAinu·Ryukyuan^ Note: For this country, only the number of residents with Japanese nationality is shown, since the number of naturalized Japanese people and their descendants is unknown.Japanese people (Japanese: , Hepburn: Nihonjin; IPA:) are people or ethnic groups identified with the Japanese archipelago.VegetableVegetableVegetables are edible parts of plants that are consumed by humans or other animals as food. This original meaning is still commonly used, and is applied to plants collectively to refer to all edible plant matter, including flowers, fruits, stems, leaves, roots, and seeds.Hybrid (biology)Hybrid (biology)Offspring of cross-species reproductionA mule is a sterile hybrid of a male donkey and a female horse. Mules are smaller than horses but stronger than donkeys, making them useful as pack animals.In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different varieties, subspecies, species or genera through sexual reproduction.PloidyPloidyPloidy () is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomalgenes. Here sets of chromosomes refers to the number of maternal and paternal chromosome copies, respectively, in each homologous chromosome pair—the form in which chromosomes naturally exist.Woo Jang-chunWoo Jang-chunJapanese nameKanji禹 長春Alternative Japanese nameKanji須永長春Woo Jang-chun (April 8, 1898 – August 10, 1959) was an agricultural scientist and botanist active in Japanese Korea and later in South Korea, famous for his discoveries in the genetics and breeding of plants. Woo was born and raised in Japan, overcoming poverty and discrimination in Imperial Japan to become a prominent researcher and teacher.BotanyBotanyBotany, also called plant science, is the branch of natural science and biology that studies the growth, reproduction and evolution of plants over the last 3.5 billion years of life on earth. As with all areas of biology and medicine, plants can be studied at range of levels from their biochemistry, molecular biology, cell biology and genetics to their ecology, pathology, anatomy, morphology and taxonomy.allohexaploidallohexaploidRelated word or term.

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