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Rice Cultivation
The history of rice cultivation is an interdisciplinary subject that studies archaeological and documentary evidence to explain how rice was first domesticated and cultivated by humans, the spread of cultivation to different regions of the planet, and the technological changes that have impacted cultivation over time. The current scientific consensus, based on archaeological and linguistic evidence, is that ''Oryza sativa'' rice was first domesticated in the Yangtze River basin in China 9,000 years ago. Cultivation, migration and trade spread rice around the world—first to much of east Asia, and then further abroad, and eventually to the Americas as part of the Columbian exchange. The now less common ''Oryza glaberrima'' rice, also known as African Rice, was independently domesticated in Africa around 3,000 years ago. ''O. glaberrima'' spread to the Americas through the transatlantic slave trade. It is still commonly grown in West Africa and is grown in a number of countrie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KITLV 40091 - Kassian Céphas - Relief Of The Hidden Base Of Borobudur - 1890-1891
The KITLV/Royal Netherlands Institute of Southeast Asian and Caribbean Studies (, abbreviated as KITLV) at Leiden was founded in 1851. Its objective is the advancement of the study of the anthropology, linguistics, social sciences, and history of Southeast Asia, the Pacific Area, and the Caribbean. Special emphasis is laid on the former Dutch colonies of the Dutch East Indies (now Indonesia), Suriname, and the Dutch West Indies (the Netherlands Antilles and Aruba). Its unique collection of books, manuscripts, prints and photographs attracts visiting scholars from all over the world. On July 1, 2014, the management of the collection was taken over by Leiden University Libraries. Jakarta In 1969, a KITLV office was started by Hans Ras in Jakarta ("KITLV-Jakarta"), as a part of an agreement with the Indonesian Institute of Sciences. Here, publications from Indonesia, Malaysia and Singapore are bought and given a place in the library of the institute, publications of the institute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oryzeae
Oryzeae is a Tribe (biology), tribe of flowering plants in the true grass family, Poaceae. It contains 11 genera, including both cultivated rice (''Oryza'') and wild rice (''Zizania''). Genera There are 11 genera classified in two subtribes: References External links * * Oryzoideae Poaceae tribes {{Poaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Biology And Evolution
''Molecular Biology and Evolution'' (''MBE'') is a monthly peer-reviewed scientific journal published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. It publishes work in the intersection of molecular biology and evolutionary biology. The founding editors were Walter Fitch and Masatoshi Nei; the present editors-in-chief are Brandon Gaut and Claudia Russo. Subject matter Evolution is the most fundamental of biological processes. MBE publishes patterns and processes that impact the evolution of life at molecular levels, across a full breadth of taxonomy, genomic organization, and functions, forms, and phenotypes. MBE's Methods, Resource, and Protocol sections include research tools that enable discoveries, while the Reviews and Perspectives synthesize different aspects of the evolutionary thought. Editorial process All MBE manuscripts are peer-reviewed. Decisions to publish are made by the Board of Editors, led by the Editors-in-Chief (Ei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oryza Nivara
''Oryza rufipogon'' is a species of flowering plant in the family ''Poaceae''. It is known as brownbeard rice, wild rice, and red rice. In 1965, ''Oryza nivara'' was separated off from ''O. rufipogon''. The separation has been questioned, and now many sources consider ''O. nivara'' to be a synonym of ''O. rufipogon''. ''O. nivara'' may be treated as the annual form of ''O. rufipogon''. It is native to East-, Southeast- and South- Asia. It has a close evolutionary relation to ''Oryza sativa'', the plant grown as a major rice food crop throughout the world. ''Oryza nivara'' is a possible wild progenitor of cultivated rice. Both have an AA genome. Description For those who accept ''Oryza nivara'' as a separate species, it is an annual, short to intermediate height (usually <) grass; panicles usually compact, rarely open; spikelets large, long and wide, with strong awn ( long); anthers long. It grows in shallow water up to , in seasonally dry and open ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japonica Rice
Japonica rice (''Oryza sativa'' subsp. ''japonica''), sometimes called sinica rice, is one of the two major domestic types of Asian rice varieties. Japonica rice is extensively cultivated and consumed in East Asia and Italy, whereas in most other regions indica rice is the dominant type of rice. Japonica rice originated from Central China, where it was first domesticated along the Yangtze River basin approximately 9,500 to 6,000 years ago. Classification The subspecies ''japonica'' can be classified into three subgroups, 'temperate japonica', 'tropical japonica' (obsolete designations: 'javanica'; ), and 'aromatic'. Temperate japonica is cultivated in East Asia (China, Japan, Korea, and Vietnam), while tropical japonica is in Indonesia, Madagascar, and also the Americas where it was brought to with slave trade. File:Chapssal (glutinous rice).jpg, Glutinous japonica rice File:Korean aromatic rice.png, Aromatic japonica rice File:Black rice.jpg, Black japonica rice File:Gree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single-nucleotide Polymorphism
In genetics and bioinformatics, a single-nucleotide polymorphism (SNP ; plural SNPs ) is a germline substitution of a single nucleotide at a specific position in the genome. Although certain definitions require the substitution to be present in a sufficiently large fraction of the population (e.g. 1% or more), many publications do not apply such a frequency threshold. For example, a Guanine, G nucleotide present at a specific location in a reference genome may be replaced by an Adenine, A in a minority of individuals. The two possible nucleotide variations of this SNP – G or A – are called alleles. SNPs can help explain differences in susceptibility to a wide range of diseases across a population. For example, a common SNP in the Factor H, CFH gene is associated with increased risk of age-related macular degeneration. Differences in the severity of an illness or response to treatments may also be manifestations of genetic variations caused by SNPs. For example, two ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shattering (agriculture)
In agriculture, shattering is the dispersal of a crop's seeds upon their becoming ripe. From an agricultural perspective this is generally an undesirable process, and in the history of crop domestication several important advances have involved a mutation in a crop plant that reduced shattering—instead of the seeds being dispersed as soon as they were ripe, the mutant plants retained the seeds for longer, which made harvesting much more effective. Non-shattering phenotype is one of the prerequisites for plant breeding especially when introgressing valuable traits from wild varieties of domesticated crops. A particularly important mutation that was selected very early in the history of agriculture removed the "brittle rachis" problem from wheat. A ripe head ("ear") of wild-type wheat is easily shattered into dispersal units when touched, or blown by the wind, because during ripening a series of abscission layers forms that divides the rachis into short segments, each attached ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allele
An allele is a variant of the sequence of nucleotides at a particular location, or Locus (genetics), locus, on a DNA molecule. Alleles can differ at a single position through Single-nucleotide polymorphism, single nucleotide polymorphisms (SNP), but they can also have insertions and deletions of up to several thousand base pairs. Most alleles observed result in little or no change in the function or amount of the gene product(s) they code or regulate for. However, sometimes different alleles can result in different observable phenotypic traits, such as different pigmentation. A notable example of this is Gregor Mendel's discovery that the white and purple flower colors in pea plants were the result of a single gene with two alleles. Nearly all multicellular organisms have two sets of chromosomes at some point in their biological life cycle; that is, they are diploid. For a given locus, if the two chromosomes contain the same allele, they, and the organism, are homozygous with re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neolithic China
This is a list of Neolithic cultures of China that have been unearthed by archaeologists. They are sorted in chronological order from earliest to latest and are followed by a schematic visualization of these cultures. It would seem that the definition of Neolithic in China is undergoing changes. The discovery in 2012 of pottery about 20,000 years BC indicates that this measure alone can no longer be used to define the period. It will fall to the more difficult task of determining when cereal domestication started. List Schematic outline These cultures existed during the period from 8500 to 1500 BC. Neolithic cultures remain unmarked and Bronze Age cultures (from 2000 BC) are marked with *. There are many differences in opinion on the dating for these cultures, so the dates chosen here are tentative: For this schematic outline of its neolithic cultures China has been divided into the following nine parts: #Northeast China: Inner Mongolia, Heilongjiang, Jilin and Liaoning. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green Revolution
The Green Revolution, or the Third Agricultural Revolution, was a period during which technology transfer initiatives resulted in a significant increase in crop yields. These changes in agriculture initially emerged in Developed country , developed countries in the early 20th century and subsequently spread globally until the late 1980s. In the late 1960s, farmers began incorporating new technologies, including High-yielding variety, high-yielding varieties of cereals, particularly dwarf wheat and rice, and the widespread use of Fertilizer, chemical fertilizers (to produce their high yields, the new seeds require far more fertilizer than traditional varieties), Pesticide , pesticides, and controlled irrigation. At the same time, newer methods of cultivation, including mechanization, were adopted, often as a package of practices to replace traditional agricultural technology. This was often in conjunction with loans conditional on policy changes being made by the Developing coun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
