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An updated linkage and comparative map of porcine chromosome 18

✍ Scribed by E. M. G. Campbell; S. C. Fahrenkrug; J. L. Vallet; T. P. L. Smith; G. A. Rohrer

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
112 KB
Volume
32
Category
Article
ISSN
0268-9146

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✦ Synopsis

Swine chromosome 18 (SSC18) has the poorest marker density in the USDA‐MARC porcine linkage map. In order to increase the marker density, seven genes from human chromosome 7 (HSA7) expected to map to SSC18 were selected for marker development. The genes selected were: growth hormone releasing hormone receptor (GHRHR), GLI‐Kruppel family member (GLI3), leptin (LEP), capping protein muscle Z‐line α 2 subunit (CAPZA2), β A inhibin (INHBA), T‐cell receptor β (TCRB) and T‐cell receptor γ (TCRG). Large‐insert clones (YACs, BACs and cosmids) that contained these genes, as well as two previously mapped microsatellite markers (SW1808 and SW1984), were identified and screened for microsatellites. New microsatellite markers were developed from these clones and mapped. Selected clones were also physically assigned by fluorescence in situ hybridization (FISH). Fifteen new microsatellite markers were added to the SSC18 linkage map resulting in a map of 28 markers. Six genes have been included into the genetic map improving the resolution of the SSC18 and HSA7 comparative map. Assignment of TCRG to SSC9 has identified a break in conserved synteny between SSC18 and HSA7.

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