Journal of Genetics (2019) 98:36 © Indian Academy of Sciences https://doi.org/10.1007/s12041-018-1048-z RESEARCH NOTE Identification of sex using SBNO1 gene in the Chinese softshell turtle, Pelodiscus sinensis (Trionychidae) LAN ZHAO, XIN WANG, QIU-HONG WAN and SHENG-GUO FANG∗ The Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education and State Conservation Centre for Gene Resources of Endangered Wildlife, College of Life Sciences, Zhejiang University, Hangzhou 310058, People’s Republic of China *For correspondence. E-mail:
[email protected]. Received 20 June 2018; revised 17 September 2018; accepted 19 September 2018; published online 11 April 2019 Abstract. The Chinese softshell turtle exhibits ZZ/ZW sex determination. To identify the sex of embryos, juvenile and adult individuals, we designed two pairs of polymerase chain reaction primers, SB1-196, which amplifies a fragment of 196 bp in the female and the other, CK1-482, which amplifies the 482-bp fragment in both the sexes. It is validated in 24 adult turtles of known sex, sampled from three different locations. This one-step sexing technique is rapid and easy to perform and is reported for the first time. Keywords. polymerase chain reaction; sex identification; sex chromosome; molecular sexing; reptile; Chinese softshell turtle. Introduction rapid method for identifying the sex of this species will contribute to development of breeding and conservation The Chinese softshell turtle, Pelodiscus sinensis (family programmes. Trionychidae, suborder Cryptodira), possesses heteromor- In the present study, a pair of primers is designed phic sex chromosomes (ZZ male, ZW female) (Kawai et al.