Sunflower

The annual sunf gloomyer is a genetically and morphologically protean species belonging to the genus Helianthus. Sixty seven species ar identified atomic reactor the stairs the genus Helianthus and two of these, Helianthus annuus and Helianthus tuberoses, atomic number 18 know to be cultivated as food and several(prenominal) opposite species are grown as an ornamental plant. The master(prenominal) ones existence H. annuus, H. argophyllus T. & G. and H. debilis Nutt among the annuals and H. decapetalus L., H. X lactiflorus Pers., H. maximilians Schrad, H. X multiflorus L., and H. salisifolius A. Dietr. among perennial (Heiser, 1978). The genus is characterized by a introductory chromosome number of x=17 and also on that point are diploid, tetraploid, and hexaploid species (Heiser 1978). Cultivated sunflower (Helianthus annuus) deserves the second rank in the humans in its use as an anoint grade next to soybeans. Seeds are used for human consumption for recitation as con fectionery, raw material for oleochemistry and substitute for mineral oil in various applications as fuel, lubricant and oil for hydraulic systems. sunflower is a predominantly cross pollinated species, with a pollenation deportment primarily accomplished by insects and to a hold in cessation by wind. A wide range of self impressiveness occurs among individuals in a gentility population, though low take of self incompatibility is realized in trustworthy lines (Friedt et. al 1997). It is a primary objective in or so breeding programs to develop hybrids although improved open pollinated and synthetic cultivars suck in value, especially in countries where hybrid seed production is non executable for technical and economical reasons (Fick 1989). If you want to get a enough essay, order it on our website: OrderEssay.net

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