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The American Chestnut Foundation
The American Chestnut Foundation (TACF) is a nonprofit United States, American organization dedicated to breeding a chestnut blight, blight-resistant American chestnut, American chestnut (''Castanea dentata'') tree and the reintroduction of this tree to the forests of the Eastern United States. The mission of The American Chestnut Foundation (TACF) is to restore the American chestnut tree to the forests of Eastern North America by breeding genetically diverse blight-resistant trees, evaluating various approaches to the management of chestnut pests and pathogens, and reintroducing the trees into the forest in an ecologically acceptable manner. The American chestnut tree once comprised a quarter of the eastern hardwood forest from Maine to Georgia (U.S. state), Georgia and west to the Ohio River, Ohio River Valley, providing a valuable economic resource in both timber and Nut (fruit), nuts, as well as an abundant food source for wildlife. An accidentally imported Asiatic chestnut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tower Hill Botanic Garden - American Chestnuts
A tower is a tall Nonbuilding structure, structure, taller than it is wide, often by a significant factor. Towers are distinguished from guyed mast, masts by their lack of guy-wires and are therefore, along with tall buildings, self-supporting structures. Towers are specifically distinguished from buildings in that they are built not to be habitable but to serve other functions using the height of the tower. For example, the height of a clock tower improves the visibility of the clock, and the height of a tower in a fortified building such as a castle increases the visibility of the surroundings for defensive purposes. Towers may also be built for observation tower, observation, leisure, or telecommunication purposes. A tower can stand alone or be supported by adjacent buildings, or it may be a feature on top of a larger structure or building. Etymology Old English ''torr'' is from Latin ''turris'' via Old French ''tor''. The Latin term together with Greek language, Greek τύ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
US Forest Service
The United States Forest Service (USFS) is an agency of the U.S. Department of Agriculture that administers the nation's 154 national forests and 20 national grasslands. The Forest Service manages of land. Major divisions of the agency include the Chief's Office, National Forest System, State and Private Forestry, Business Operations, and Research and Development. The agency manages about 25% of federal lands and is the only major national land management agency not part of the U.S. Department of the Interior, which manages the National Park Service, the U.S. Fish and Wildlife Service, and the Bureau of Land Management. History The concept of national forests was born from Theodore Roosevelt's conservation group, Boone and Crockett Club, due to concerns regarding Yellowstone National Park beginning as early as 1875. In 1876, Congress formed the office of Special Agent in the Department of Agriculture to assess the quality and conditions of forests in the United ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Environmental Organizations Based In The United States
A biophysical environment is a biotic and abiotic surrounding of an organism or population, and consequently includes the factors that have an influence in their survival, development, and evolution. A biophysical environment can vary in scale from microscopic to global in extent. It can also be subdivided according to its attributes. Examples include the marine environment, the atmospheric environment and the terrestrial environment. The number of biophysical environments is countless, given that each living organism has its own environment. The term ''environment'' can refer to a singular global environment in relation to humanity, or a local biophysical environment, e.g. the UK's Environment Agency. Life-environment interaction All life that has survived must have adapted to the conditions of its environment. Temperature, light, humidity, soil nutrients, etc., all influence the species within an environment. However, life in turn modifies, in various forms, its conditions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seed
A seed is an embryonic plant enclosed in a protective outer covering, along with a food reserve. The formation of the seed is a part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiosperm plants. Seeds are the product of the ripened ovule, after the embryo sac is fertilized by sperm from pollen, forming a zygote. The embryo within a seed develops from the zygote, and grows within the mother plant to a certain size before growth is halted. The seed coat arises from the integuments of the ovule. Seeds have been an important development in the reproduction and success of vegetable gymnosperm and angiosperm plants, relative to more primitive plants such as ferns, mosses and liverworts, which do not have seeds and use water-dependent means to propagate themselves. Seed plants now dominate biological niches on land, from forests to grasslands both in hot and cold climates. The term "seed" also has a general mean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Castanea Mollissima
''Castanea mollissima'' (), also known as the Chinese chestnut, is a member of the family Fagaceae, and a species of chestnut native to China, Taiwan, and Korea. Description It is a deciduous tree growing to 20 m tall with a broad crown. The leaves are alternate, simple, 10–22 cm long and 4.5–8 cm broad, with a toothed margin. The flowers are produced in catkins 4–20 cm long, with the female flowers at the base of the catkin and males on the rest. The fruit is a densely spiny cupule 4–8 cm diameter, containing two or three glossy brown nuts; these are 2–3 cm diameter on wild trees. The scientific name ''mollissima'' derives from the softly downy shoots and young leaves. Taxonomy Synonyms: ''Castanea bungeana'' Blume; ''C. duclouxii'' Dode; ''C. fargesii'' Dode; ''C. formosana'' (Hayata) Hayata; ''C. hupehensis'' Dode; ''C. mollissima'' var. ''pendula'' X. Y. Zhou & Z. D. Zhou; ''C. sativa'' Miller var. ''formosana'' Hayata; ''C. sativa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Backcrossing
Backcrossing is a crossing of a hybrid with one of its parents or an individual genetically similar to its parent, to achieve offspring with a genetic identity closer to that of the parent. It is used in horticulture, animal breeding, and production of gene knockout organisms. Backcrossed hybrids are sometimes described with acronym "BC"; for example, an F1 hybrid crossed with one of its parents (or a genetically similar individual) can be termed a BC1 hybrid, and a further cross of the BC1 hybrid to the same parent (or a genetically similar individual) produces a BC2 hybrid. Plants Advantages * If the recurrent parent is an elite genotype, at the end of the backcrossing programme, an elite genotype is recovered. * As no "new" recombination results, the elite combination is not lost. Disadvantages * It works poorly for quantitative traits. * It is more restricted for recessive traits. * In practice, sections of genome from the nonrecurrent parents are often still presen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meadowview, Virginia
Meadowview (listed as Meadow View by the Census Bureau) is a census-designated place (CDP) in Washington County, Virginia, United States. The population was 967 at the 2010 census. It is part of the Kingsport– Bristol (TN)– Bristol (VA) Metropolitan Statistical Area, which is a component of the Johnson City–Kingsport–Bristol, TN-VA Combined Statistical Area – commonly known as the " Tri-Cities" region. History The quiet community of Meadowview was called Meadow View (two separate words) until the 1930s. Native American trails passed near the later site of the town. The first settler was James Glenn, who purchased land in 1783. Different theories exist regarding the origin of community's name. Some believe the name may come from an early name of Meadow Mountain, the name for nearby Whitetop Mountain on the 1749 Peter Jefferson Map. Another explanation is that William Edmondson named his house '' Edmondson's Meadow'' and enjoyed looking at the n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maize
Maize ( ; ''Zea mays'' subsp. ''mays'', from es, maíz after tnq, mahiz), also known as corn (North American English, North American and Australian English), is a cereal grain first domesticated by indigenous peoples of Mexico, indigenous peoples in southern Mexico about 10,000 years ago. The leafy stalk of the plant produces pollen inflorescences (or "tassels") and separate ovule, ovuliferous inflorescences called ear (botany), ears that when fertilized yield Corn kernels, kernels or seeds, which are fruits. The term ''maize'' is preferred in formal, scientific, and international usage as a common name because it refers specifically to this one grain, unlike ''corn'', which has a complex variety of meanings that vary by context and geographic region. Maize has become a staple food in many parts of the world, with the List of most valuable crops and livestock products, total production of maize surpassing that of wheat or rice. In addition to being consumed directly by huma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Burnham (geneticist)
Charles Russell Burnham (1904–1995) was an American plant geneticist who studied maize cytology and genetics. In 1968 he was elected a fellow of the American Society of Agronomy. After his retirement he played a critical role in developing a blight resistant strain of the American chestnut. Early life and education Burnham was born in Hebron, Wisconsin in 1904 and grew up in Fort Atkinson, Wisconsin. He attended college first at the University of Minnesota for two years, then transferring to the University of Wisconsin where he earned his BA in 1924, and MS in 1925. He became a graduate assistant of RA Brink studying maize genetics and earned a PhD in genetics with a minor in Plant Pathology in 1929. At this point, he received a National Research Fellowship to travel to Cornell University where he studied under Rollins A. Emerson and alongside Marcus Rhoades and future Nobel Prize winners Barbara McClintock and George Beadle. After Cornell, Burnham went on to work at Ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Missouri Botanical Garden
The Missouri Botanical Garden is a botanical garden located at 4344 Shaw Boulevard in St. Louis, Missouri. It is also known informally as Shaw's Garden for founder and philanthropist Henry Shaw. Its herbarium, with more than 6.6 million specimens, is the second largest in North America, behind that of the New York Botanical Garden. The '' Index Herbariorum'' code assigned to the herbarium is MO and it is used when citing housed specimens. History The land that is currently the Missouri Botanical Garden was previously the land of businessman Henry Shaw. Founded in 1859, the Missouri Botanical Garden is one of the oldest botanical institutions in the United States and a National Historic Landmark. It is also listed in the National Register of Historic Places. In 1983, the botanical garden was added as the fourth subdistrict of the Metropolitan Zoological Park and Museum District. The garden is a center for botanical research and science education of international ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peter Raven
Peter Hamilton Raven (born June 13, 1936) is an American botanist and environmentalist, notable as the longtime director, now President Emeritus, of the Missouri Botanical Garden. Early life On June 13, 1936, Raven was born in Shanghai, China to American parents, Walter Francis Raven and Isabelle Marion Breen. His father's uncle Frank Jay Raven was, for a time, one of the wealthiest Americans in China, but was later jailed in a banking scandal. That incident and Japanese aggression in China led the Raven family to return to San Francisco, CA in the late 1930s. After becoming a member of the California Academy of Sciences while still a youth, Raven went on to graduate with a BSc in biology from the University of California, Berkeley in 1957 and a Ph.D. in botany from the University of California, Los Angeles in 1960. Career After teaching at Stanford University, Raven went on to become Director of the Missouri Botanical Garden in 1971. In 2006, his position was renamed Presid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norman Borlaug
Norman Ernest Borlaug (; March 25, 1914September 12, 2009) was an American agronomist who led initiatives worldwide that contributed to the extensive increases in agricultural production termed the Green Revolution. Borlaug was awarded multiple honors for his work, including the Nobel Peace Prize, the Presidential Medal of Freedom and the Congressional Gold Medal. Borlaug received his B.S. in forestry in 1937 and Ph.D. in plant pathology and genetics from the University of Minnesota in 1942. He took up an agricultural research position with CIMMYT in Mexico, where he developed semi-dwarf, high- yield, disease-resistant wheat varieties. During the mid-20th century, Borlaug led the introduction of these high-yielding varieties combined with modern agricultural production techniques to Mexico, Pakistan, and India. As a result, Mexico became a net exporter of wheat by 1963. Between 1965 and 1970, wheat yields nearly doubled in Pakistan and India, greatly improving the food securi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
