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This image shows haploid (single), diploid (double), triploid (triple), and tetraploid (quadruple) sets of chromosomes. Triploid and tetraploid chromosomes are examples of polyploidy. Polyploidy is a condition in which the cells of an organism have more than two paired sets of ( homologous ) chromosomes .
Grass carp grow large and are strong fighters when hooked on a line, but because of their vegetarian habits and their wariness, they can be difficult to catch via angling. [18] The IGFA World record for a grass carp caught on line and hook is 39.75 kg (87.6 lb), caught in Bulgaria in 2009. [ 19 ]
Asian carp is an informal grouping of several species of cyprinid freshwater fishes native to Eurasia, commonly referring to the four East Asian species silver carp, bighead carp, grass carp (a.k.a. white amur) and black carp (a.k.a. black amur), [note 1] which were introduced to North America during the 1970s and now regarded as invasive in the United States.
The haploid embryo is rescued, cultured, and chromosome-doubling produces doubled haploids. The in vitro methods include gynogenesis (ovary and flower culture) and androgenesis (anther and microspore culture). [3] Androgenesis is the preferred method. Another method of producing the haploids is wide crossing.
Cyprinus rubrofuscus, the Amur carp, is a species of cyprinid fish, and is the wild form of the well-known koi. It is widespread in the fresh waters of eastern Asia , native to China , Korea , Russia , Vietnam and Laos from the Amur to Red River basins , and has also been introduced outside its native range. [ 1 ]
Two single-celled haploid gametes, each containing n unpaired chromosomes, fuse to form a single-celled diploid zygote, which now contains n pairs of chromosomes, i.e. 2n chromosomes in total. [17] The single-celled diploid zygote germinates, dividing by the normal process , which maintains the number of chromosomes at 2n.
Cypriniformes / s ɪ ˈ p r ɪ n ɪ f ɔːr m iː z / is an order of ray-finned fish, which includes many families and genera of cyprinid (carps and their kin) fish, such as barbs, gobies, loaches, botias, and minnows (among others).
Common carp by Alexander Francis Lydon. The type subspecies is Cyprinus carpio carpio, native to much of Europe (notably the Danube and Volga Rivers). [2] [4]The subspecies Cyprinus carpio haematopterus (Amur carp), native to eastern Asia, was recognized in the past, [4] but recent authorities treat it as a separate species under the name Cyprinus rubrofuscus.