Sex Determination of Sika Deer (Cervus nippon yesoensis) Using Nested PCR from Feces Collected in the Field

概要

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We describe a method for determining the sex of sika deer (Cervus nippon yesoensis) from feces collected in the field. Using a nested polymerase chain reaction (nested PCR), partial sequences of the sex determination region of the Y chromosome (SRY) gene and X zinc finger protein (ZFX) gene were amplified. In 19 individuals with sex information, the correct sex was successfully detected from muscle and fecal samples from the rectum. Sequences of target amplicons in 4 randomly selected samples were completely matched between muscle and fecal samples. Among 75 fecal samples collected noninvasively in the field, 68–71 samples (90.7–94.7%) yielded successful sex determinations. Using this technique, feces collected in the field would enhance the utility of genetic analysis. As a result, instead of biomaterials, these samples can serve as new material or alternative materials. Finally, it can be expected that this technique will contribute to reveal in advanced detail the population dynamics and genetic diversity needed to carry out effective population control and to reduce the extinction risk of sika deer.