12/7/2023 0 Comments Corn cob translucent backgroundCollins supposed that waxy maize has arisen by a way of mutation in Upper Burma. He also states that Portuguese arrived in China in 1516, simultaneously introducing maize. I consider these two assertions as positive, in spite of the contrary opinion of some authors." īut the finding of this unique variety of maize suggested a re-examination of the question. The question was considered closed at the end of the 19th century by De Candolle who stated: "Maize is of American origin, and has only been introduced into the old world since the discovery of the new. The discovery in China of a distinct type of maize bears the historical question whether maize was known in the Orient before the discovery of America. Kuleshov, when screening the distribution of maize in Asia, found it in many other places. In 1915, the plant was rediscovered in Upper Burma and in 1920 in the Philippines. He was able to grow 53 plants to maturity and made a thorough characterisation of these plants, including photographs, which were published in a USDA bulletin issued in December 1909. The corn is much more glutinous than the other varieties, so far as I know, and may be found to be of some use, perhaps as porridge." These seeds were planted on May 9, 1908, near Washington, D.C., by a botanist named Guy N. There are several colours, but they are said to be all the same variety. A note with the seeds called it: "A peculiar kind of corn. Office of Foreign Seed and Plant Introduction. Farnham, a Presbyterian missionary in Shanghai, sent a sample of seeds to the U.S. The first mentions of it were found in the archives of the U.S. The exact history of waxy maize is unknown. Please help rewrite it to a more formal, encyclopedic tone. This section uses first-person ( we) inappropriately. Waxy maize yield about 3.5% less than their normal dent counterparts and has to be isolated from any nearby normal maize fields by at least 200 meters. It is coded by a single recessive gene (wx). Geneticists could show that waxy maize has a defect in metabolism precluding the synthesis of amylose in the endosperm. When feeding trials later on showed that waxy maize could produce more efficient feed gains than normal dent maize, interest in waxy maize suddenly expanded. Amylopectin or waxy starch is now used mainly in food products, but also in the textile, adhesive, corrugating and paper industry. Until World War II, the main source of starch in the United States was tapioca, but when Japan severed the supply lines of the U.S., they forced processors to turn to waxy maize. In 1922 a researcher found that the endosperm of waxy maize contained only amylopectin and no amylose starch molecule in opposition to normal dent corn varieties that contain both. As this plant showed many peculiar traits, the American breeders long used it as a genetic marker to tag the existence of hidden genes in other maize breeding programs. The corn was first described from a specimen from China in 1909. Waxy corn or glutinous corn is a type of field corn characterized by its sticky texture when cooked as a result of larger amounts of amylopectin. ( January 2014) ( Learn how and when to remove this template message) Please help improve it to make it understandable to non-experts, without removing the technical details. This article may be too technical for most readers to understand.
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