7/25/2023 0 Comments Corn spike definition![]() High- protein barley is best suited for animal feed. distichon, has a lower protein content than six-row barley, thus a more fermentable sugar content. Two-row barley, sometimes considered a separate species, H. Recent genetic studies have revealed that a mutation in one gene, vrs1, is responsible for the transition from two-row to six-row barley. A pair of mutations (one dominant, the other recessive) result in fertile lateral spikelets to produce six-row barleys. This condition is retained in certain cultivars known as two-row barleys. In wild barley (and other Old World species of Hordeum), only the central spikelet is fertile, while the other two are reduced. ![]() Spikelets are arranged in triplets which alternate along the rachis. Little is known about the genetic variation among domesticated and wild genes in the chromosomal regions. ĭomestication in barley is followed by the change of key phenotypic traits at the genetic level. The nonshattering condition is recessive, so varieties of barley that exhibit this condition are homozygous for the mutant allele. The nonshattering condition is caused by a mutation in one of two tightly linked genes known as Bt 1 and Bt 2 many cultivars possess both mutations. Domesticated barley has nonshattering spikes, making it much easier to harvest the mature ears. Wild barley has a brittle spike upon maturity, the spikelets separate, facilitating seed dispersal. Additionally, wild barley has distinctive genes, alleles, and regulators with potential for resistance to abiotic or biotic stresses to cultivated barley and adaptation to climatic changes. Over the course of domestication, barley grain morphology changed substantially, moving from an elongated shape to a more rounded spherical one. spontaneum) is the ancestor of domestic barley ( H. However, in a study of genome-wide diversity markers, Tibet was found to be an additional center of domestication of cultivated barley. Outside this region, the wild barley is less common and is usually found in disturbed habitats. spontaneum, is abundant in grasslands and woodlands throughout the Fertile Crescent area of Western Asia and northeast Africa, and is abundant in disturbed habitats, roadsides, and orchards. The wild ancestor of domesticated barley, Hordeum vulgare subsp. It is a self-pollinating, diploid species with 14 chromosomes. inval.īarley is a member of the grass family. ![]() Hordeum transcaucasicum R.E.Regel nom.Special thanks to the contributors of the open-source code that was used in this project: Elastic Search, WordNet, and note that Reverse Dictionary uses third party scripts (such as Google Analytics and advertisements) which use cookies. The definitions are sourced from the famous and open-source WordNet database, so a huge thanks to the many contributors for creating such an awesome free resource. In case you didn't notice, you can click on words in the search results and you'll be presented with the definition of that word (if available). For those interested, I also developed Describing Words which helps you find adjectives and interesting descriptors for things (e.g. So this project, Reverse Dictionary, is meant to go hand-in-hand with Related Words to act as a word-finding and brainstorming toolset. That project is closer to a thesaurus in the sense that it returns synonyms for a word (or short phrase) query, but it also returns many broadly related words that aren't included in thesauri. I made this tool after working on Related Words which is a very similar tool, except it uses a bunch of algorithms and multiple databases to find similar words to a search query. So in a sense, this tool is a "search engine for words", or a sentence to word converter. It acts a lot like a thesaurus except that it allows you to search with a definition, rather than a single word. The engine has indexed several million definitions so far, and at this stage it's starting to give consistently good results (though it may return weird results sometimes). ![]() For example, if you type something like "longing for a time in the past", then the engine will return "nostalgia". It simply looks through tonnes of dictionary definitions and grabs the ones that most closely match your search query. The way Reverse Dictionary works is pretty simple.
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