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Triangle Of U
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 tetraploid vegetables and oilseed crop species. It has since been confirmed by studies of DNA and proteins. The theory is summarized by a triangular diagram that shows the three ancestral genomes, denoted by AA, BB, and CC, at the corners of the triangle, and the three derived ones, denoted by AABB, AACC, and BBCC, along its sides. The theory was first published in 1935 by Woo Jang-choon, a Korean-Japanese botanist (writing under the Japanized name "U Nagaharu"). Woo made synthetic hybrids between the diploid and tetraploid species and examined how the chromosomes paired in the resulting triploids. U's theory The six species are The code in the "Chr.count" column specifies the total number of chromosomes in each so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triangle Of U Simple1
A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices ''A'', ''B'', and ''C'' is denoted \triangle ABC. In Euclidean geometry, any three points, when non-collinear, determine a unique triangle and simultaneously, a unique plane (i.e. a two-dimensional Euclidean space). In other words, there is only one plane that contains that triangle, and every triangle is contained in some plane. If the entire geometry is only the Euclidean plane, there is only one plane and all triangles are contained in it; however, in higher-dimensional Euclidean spaces, this is no longer true. This article is about triangles in Euclidean geometry, and in particular, the Euclidean plane, except where otherwise noted. Types of triangle The terminology for categorizing triangles is more than two thousand years old, having been defined on the very first page of Euclid's Elements. The names used for modern classification are eit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brassica Oleracea
''Brassica oleracea'' is a plant species from family Brassicaceae that includes many common cultivars used as vegetables, such as cabbage, broccoli, cauliflower, kale, Brussels sprouts, collard greens, Savoy cabbage, kohlrabi, and gai lan. Its uncultivated form, wild cabbage, native to coastal southern and western Europe, is a hardy plant with high tolerance for salt and lime. However, its intolerance of competition from other plants typically restrict its natural occurrence to limestone sea cliffs, like the chalk cliffs on both sides of the English Channel. Wild ''B. oleracea'' is a tall biennial plant that forms a stout rosette of large leaves in the first year. The leaves are fleshier and thicker than other ''Brassica'' species—an adaptation that helps it store water and nutrients in its difficult growing environment. In its second year, it uses the stored nutrients to produce a flower spike tall with numerous yellow flowers. A 2021 study suggested that the Eastern Medite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethiopian Mustard
''Brassica carinata'' is a species of flowering plant in the Brassicaceae family. It is referred to by the common names Ethiopian rape or Ethiopian mustard. It is believed to be a hybrid between ''Brassica nigra'' and ''Brassica oleracea''. The flowers attract honey bees to collect pollen and nectar. Leaf uses The plant has a mild flavor, and is eaten as a leaf vegetable. It is known as ( om, Raafuu); ''habesha gomen'', (Amharic: ሐበሻ ጎመን). Named varieties include Texsel, which is particularly adapted to temperate climates. Cultivation of Ethiopia mustard as leaf vegetable is limited to small-scale production but it is slowly gaining popularity in rural as well as urban areas where commercial production is taking place. Seed uses Although ''Brassica carinata'' is cultivated as an oilseed crop in Ethiopia, it has high levels of undesirable glucosinolates and erucic acid. The closely related ''Brassica napus'' (rapeseed) is considered a better oilseed crop in compariso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
