Journal of Veterinary Medical Science
Online ISSN : 1347-7439
Print ISSN : 0916-7250
Theriogenology
X monosomy in the endangered Kiso horse breed detected by a parentage test using sex chromosome linked genes and microsatellites
Shiori GAMOTeruaki TOZAKIHironaga KAKOIKei-ichi HIROTAKotono NAKAMURANoriko NISHIIJulio ALUMUNIAMasaki TAKASU
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2019 年 81 巻 1 号 p. 91-94

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A routine parentage test as part of a conservation program for Kiso horses identified a possible sex chromosome anomaly in a 7 months-old filly because of an aberrant result using LEX3, an X-linked marker. We then analyzed X-linked markers (LEX26, TKY38, and TKY270), Y-linked markers (Eca.YH12, Eca.YM2, Eca.YA16, and the sex-determining region Y gene), and an X/Y marker (Amelogenin gene). This analysis demonstrated that the filly had not inherited an X chromosome from her sire. A karyotyping analysis confirmed that the filly was 63,XO. As it was suspected that the horse would be sterile, we avoided using the horse as a broodmare; the information should also serve to prevent unnecessary conflict between owners transferring and receiving the horse.

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