Catalogue of Organisms: Scattering the Sheaves (Taxon of.
Wheat is a grass widely cultivated for its seed, a cereal grain which is a worldwide staple food. The many species of wheat together make up the genus Triticum; the most widely grown is common wheat (T. aestivum).The archaeological record suggests that wheat was first cultivated in the regions of the Fertile Crescent around 9600 BCE. Botanically, the wheat kernel is a type of fruit called a.A number of authors had integrated some cytogenetic data into revisions of Triticeae but two authors in 1984 independently suggested that Triticeae classification should be based entirely on cytogenetic data alone. Not surprisingly, this lead to a botanical rift - even if one was willing to credit that genetic characters might be a better.Angiosperm - Angiosperm - Significance to humans: Angiosperms are as important to humans as they are to other animals. Angiosperms serve as the major source of food—either directly or indirectly through consumption by herbivores—and, as mentioned above, they are a primary source of consumer goods, such as building materials, textile fibres, spices and herbs, and pharmaceuticals. Among the.
Establishing relationships within the Triticeae has always been a difficult prospect; hybridisation and polyploidy have been major factors in the evolution of the tribe. Until the mid-1980s, most western authors continued to use a classification whose basic philosophy went right back to Linnaeus' Species Plantarum (Barkworth, 2000.Triticum (wheat) comprises six biological species at the diploid, tetraploid, and hexaploid levels (Table 1).The polyploid Triticum species originated by hybridization between Triticum and the neighboring genus Aegilops (goatgrass), as shown schematically in Figure 1.The tetraploid species, T. turgidum (genomes AABB) and T. timopheevii (genomes AAGG), are polyphyletic.
Transposable elements (TEs) are genomic units able to move within the genome of virtually all organisms. Due to their natural repetitive numbers and their high structural diversity, the identification and classification of TEs remain a challenge in sequenced genomes. Although TEs were initially regarded as “junk DNA”, it has been demonstrated that they play key roles in chromosome.
