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Figure 6. Comparison of chromosomal locations of chicken microchromosomal linkages among vertebrate species.The chromosomal locations of chicken microchromosomal linkages on X. tropicalis chromosome 3 (A) and E. quadrivirgata chromosome 2 (B) are compared among four tetrapod species, X. tropicalis, salamander (A. mexicanum/A. tigrinum), lizard (A. carolinensis), and snake (E. quadrivirgata), and ancestral teleost fish. Genetic linkages of chicken macro- and microchromosomes are represented by the same colored bars as those in Figure 5, and each conserved genetic linkage was defined when two or more genes were located on each of chicken chromosomes. The chromosome numbers of the chicken microchromosomes are shown to the left of each chromosome. Information on the genetic linkages for the ancestral teleost fish, salamander, snake, lizard, and chicken was taken from Kasahara et al. [17] and Nakatani et al. [24], Voss et al. [27], Matsubara et al. [31], [32], Alföldi et al. [19] and the Ensembl Anole Lizard Genome Browser (http://www.ensembl.org/Anolis_carolinensis), and the Ensembl Chicken Genome Browser (http://www.ensembl.org/Gallus_gallus), respectively. The lizard chromosome that is homologous to GGA10 has not been identified yet. The genetic linkages of GGA10, 13, and 22 on X. tropicalis chromosome 3 and GGA12, 13, and 18 on snake chromosome 2 were localized to nonhomologous chromosomes in the other species, except for GGA13 and GGA18 on salamander chromosome 3. The salamander linkage 8 and 12 were contained in the same linkage group [26], [27], [49]. Image published in: Uno Y et al. (2012) Image reproduced on Xenbase with permission of the publisher and the copyright holder. This image is reproduced with permission of the journal and the copyright holder. This is an open-access article distributed under the terms of the Creative Commons Attribution license Larger Image Printer Friendly View

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