Sunflower

The annual sunf mooer is a genetically and morphologically protean species belonging to the genus Helianthus. Sixty seven species ar identified coldcock the stairs the genus Helianthus and two of these, Helianthus annuus and Helianthus tuberoses, ar know to be cultivated as food and several(prenominal) opposite species are grown as an ornamental plant. The top dog 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 at that place are diploid, tetraploid, and hexaploid species (Heiser 1978). Cultivated sunflower (Helianthus annuus) deserves the second rank in the humans in its use as an fossil oil harvesting next to soybeans. Seeds are used for human consumption for employment as confectionery, 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 pollination deportment primarily accomplished by insects and to a special cessation by wind.

A wide range of ego impressiveness occurs among individuals in a gentility population, though low take of self incompatibility is realized in reliable lines (Friedt et. al 1997). It is a primary objective in well-nigh breeding programs to develop hybrids although improved open pollinated and synthetic cultivars cause value, especially in countries where hybrid seed production is non executable for technic al and economical reasons (Fick 1989). ! If you want to get a enough essay, order it on our website: OrderEssay.net

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