Sex Ratio Distortion in Hybrids of Drosophila albomicans and D. nasuta
نویسنده
چکیده
Yung-Yu Yang, Fei-Jann Lin and Hwei-yu Chang (2004) Sex ratio distortion in hybrids of Drosophila albomicans and D. nasuta. Zoological Studies 43(3): 622-628. A sex-ratio distorter in Drosophila albomicans was uncovered by the hybridization between Japanese Okinawa D. albomicans females and Indian D. nasuta males. The F1 male from this cross produces female-biased offspring. The genic nature demonstrated in the present study suggests that meiotic drive instead of non-disjunction of the sex chromosomes during meiosis is the major cause for this. The meiotic driver was found to be located on the neo-X chromosome of D. albomicans, whose genome also contains drive suppressors, while that of D. nasuta is suppressor-free. In addition, hybrid F1 and F2 males were found to be semisterile probably due to an interaction between the 3rd and Y chromosomes of D. nasuta and the autosomes of D. albomicans. http://www.sinica.edu.tw/zool/zoolstud/43.3/622.pdf
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